RISC-V: Add -mpreferred-stack-boundary option.

[official-gcc.git] / gcc / ChangeLog

2018-01-23  Andrew Waterman  <andrew@sifive.com>
            Jim Wilson  <jimw@sifive.com>

        * config/riscv/riscv.c (riscv_stack_boundary): New.
        (riscv_option_override): Set riscv_stack_boundary.  Handle
        riscv_preferred_stack_boundary_arg.
        * config/riscv/riscv.h (MIN_STACK_BOUNDARY, ABI_STACK_BOUNDARY): New.
        (BIGGEST_ALIGNMENT): Set to STACK_BOUNDARY.
        (STACK_BOUNDARY): Set to riscv_stack_boundary.
        (RISCV_STACK_ALIGN): Use STACK_BOUNDARY.
        * config/riscv/riscv.opt (mpreferred-stack-boundary): New.
        * doc/invoke.tex (RISC-V Options): Add -mpreferred-stack-boundary.

2018-01-23  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/83905
        * config/i386/i386.c (ix86_expand_prologue): Use cost reference
        of struct ix86_frame.
        (ix86_expand_epilogue): Likewise.  Add a local variable for
        the reg_save_offset field in struct ix86_frame.

2018-01-23  Bin Cheng  <bin.cheng@arm.com>

        PR tree-optimization/82604
        * tree-loop-distribution.c (enum partition_kind): New enum item
        PKIND_PARTIAL_MEMSET.
        (partition_builtin_p): Support above new enum item.
        (generate_code_for_partition): Ditto.
        (compute_access_range): Differentiate cases that equality can be
        proven at all loops, the innermost loops or no loops.
        (classify_builtin_st, classify_builtin_ldst): Adjust call to above
        function.  Set PKIND_PARTIAL_MEMSET for partition appropriately.
        (finalize_partitions, distribute_loop): Don't fuse partition of
        PKIND_PARTIAL_MEMSET kind when distributing 3-level loop nest.
        (prepare_perfect_loop_nest): Distribute 3-level loop nest only if
        parloop is enabled.

2018-01-23  Martin Liska  <mliska@suse.cz>

        * predict.def (PRED_INDIR_CALL): Set probability to PROB_EVEN in
        order to ignore the predictor.
        (PRED_POLYMORPHIC_CALL): Likewise.
        (PRED_RECURSIVE_CALL): Likewise.

2018-01-23  Martin Liska  <mliska@suse.cz>

        * tree-profile.c (tree_profiling): Print function header to
        aware reader which function we are working on.
        * value-prof.c (gimple_find_values_to_profile): Do not print
        not interesting value histograms.

2018-01-23  Martin Liska  <mliska@suse.cz>

        * profile-count.h (enum profile_quality): Add
        profile_uninitialized as the first value. Do not number values
        as they are zero based.
        (profile_count::verify): Update sanity check.
        (profile_probability::verify): Likewise.

2018-01-23  Nathan Sidwell  <nathan@acm.org>

        * doc/invoke.texi (ffor-scope): Deprecate.

2018-01-23  David Malcolm  <dmalcolm@redhat.com>

        PR tree-optimization/83510
        * domwalk.c (set_all_edges_as_executable): New function.
        (dom_walker::dom_walker): Convert bool param
        "skip_unreachable_blocks" to enum reachability.  Move setup of
        edge flags to set_all_edges_as_executable and only do it when
        reachability is REACHABLE_BLOCKS.
        * domwalk.h (enum dom_walker::reachability): New enum.
        (dom_walker::dom_walker): Convert bool param
        "skip_unreachable_blocks" to enum reachability.
        (set_all_edges_as_executable): New decl.
        * graphite-scop-detection.c  (gather_bbs::gather_bbs): Convert
        from false for "skip_unreachable_blocks" to ALL_BLOCKS for
        "reachability".
        * tree-ssa-dom.c (dom_opt_dom_walker::dom_opt_dom_walker): Likewise,
        but converting true to REACHABLE_BLOCKS.
        * tree-ssa-sccvn.c (sccvn_dom_walker::sccvn_dom_walker): Likewise.
        * tree-vrp.c
        (check_array_bounds_dom_walker::check_array_bounds_dom_walker):
        Likewise, but converting it to REACHABLE_BLOCKS_PRESERVING_FLAGS.
        (vrp_dom_walker::vrp_dom_walker): Likewise, but converting it to
        REACHABLE_BLOCKS.
        (vrp_prop::vrp_finalize): Call set_all_edges_as_executable
        if check_all_array_refs will be called.

2018-01-23  David Malcolm  <dmalcolm@redhat.com>

        * tree.c (selftest::test_location_wrappers): Add more test
        coverage.

2018-01-23  David Malcolm  <dmalcolm@redhat.com>

        * sbitmap.c (selftest::test_set_range): Fix memory leaks.
        (selftest::test_bit_in_range): Likewise.

2018-01-23  Richard Sandiford  <richard.sandiford@linaro.org>

        PR testsuite/83888
        * doc/sourcebuild.texi (vect_float): Say that the selector
        only describes the situation when -funsafe-math-optimizations is on.
        (vect_float_strict): Document.

2018-01-23  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83965
        * tree-vect-patterns.c (vect_reassociating_reduction_p): New function.
        (vect_recog_dot_prod_pattern, vect_recog_sad_pattern): Use it
        instead of checking only for a reduction.
        (vect_recog_widen_sum_pattern): Likewise.

2018-01-23  Jan Hubicka  <hubicka@ucw.cz>

        * predict.c (probably_never_executed): Only use precise profile info.
        (compute_function_frequency): Skip after inlining hack since we now
        have quality checking.

2018-01-23  Jan Hubicka  <hubicka@ucw.cz>

        * profile-count.h (profile_probability::very_unlikely,
        profile_probability::unlikely, profile_probability::even): Set
        precision to guessed.

2018-01-23  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83963
        * graphite-scop-detection.c (scop_detection::harmful_loop_in_region):
        Properly terminate dominator walk when crossing the exit edge not
        when visiting its source block.

2018-01-23  Jakub Jelinek  <jakub@redhat.com>

        PR c++/83918
        * tree.c (maybe_wrap_with_location): Use NON_LVALUE_EXPR rather than
        VIEW_CONVERT_EXPR to wrap CONST_DECLs.

2018-01-22  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/83957
        * omp-expand.c (expand_omp_for_generic): Ignore virtual PHIs.  Remove
        semicolon after for body surrounded by braces.

        PR tree-optimization/83081
        * profile-count.h (profile_probability::split): New method.
        * dojump.c (do_jump_1) <case TRUTH_ANDIF_EXPR, case TRUTH_ORIF_EXPR>:
        Use profile_probability::split.
        (do_compare_rtx_and_jump): Fix adjustment of probabilities
        when splitting a single conditional jump into 2.

2018-01-22  David Malcolm  <dmalcolm@redhat.com>

        PR tree-optimization/69452
        * tree-ssa-loop-im.c (class move_computations_dom_walker): Remove
        decl.

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78-expand.md: New define_expand "bswaphi2"
        * config/rl78/rl78-virt.md: New define_insn "*bswaphi2_virt"
        * config/rl78/rl78-real.md: New define_insn "*bswaphi2_real"

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78-protos.h: New function declaration rl78_split_movdi
        * config/rl78/rl78.md: New define_expand "movdi"
        * config/rl78/rl78.c: New function definition rl78_split_movdi

2018-01-22  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/83862
        * config/rs6000/rs6000-protos.h (rs6000_split_signbit): Delete,
        no longer used.
        * config/rs6000/rs6000.c (rs6000_split_signbit): Likewise.
        * config/rs6000/rs6000.md (signbit<mode>2): Change code for IEEE
        128-bit to produce an UNSPEC move to get the double word with the
        signbit and then a shift directly to do signbit.
        (signbit<mode>2_dm): Replace old IEEE 128-bit signbit
        implementation with a new version that just does either a direct
        move or a regular move.  Move memory interface to separate insns.
        Move insns so they are next to the expander.
        (signbit<mode>2_dm_mem_be): New combiner insns to combine load
        with signbit move.  Split big and little endian case.
        (signbit<mode>2_dm_mem_le): Likewise.
        (signbit<mode>2_dm_<su>ext): Delete, no longer used.
        (signbit<mode>2_dm2): Likewise.

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78.md: New define_expand "anddi3".

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78.md: New define_expand "umindi3".

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78.md: New define_expand "smindi3".

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78.md: New define_expand "smaxdi3".

2018-01-22 Carl Love <cel@us.ibm.com>

        * config/rs6000/rs6000-builtin.def (ST_ELEMREV_V1TI, LD_ELEMREV_V1TI,
        LVX_V1TI): Add macro expansion.
        * config/rs6000/rs6000-c.c (altivec_builtin_types): Add argument
        definitions for VSX_BUILTIN_VEC_XST_BE, VSX_BUILTIN_VEC_ST,
        VSX_BUILTIN_VEC_XL, LD_ELEMREV_V1TI builtins.
        * config/rs6000/rs6000-p8swap.c (insn_is_swappable_p);
        Change check to determine if the instruction is a byte reversing
        entry.  Fix typo in comment.
        * config/rs6000/rs6000.c (altivec_expand_builtin): Add case entry
        for VSX_BUILTIN_ST_ELEMREV_V1TI and VSX_BUILTIN_LD_ELEMREV_V1TI.
        Add def_builtin calls for new builtins.
        * config/rs6000/vsx.md (vsx_st_elemrev_v1ti, vsx_ld_elemrev_v1ti):
        Add define_insn expansion.

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

        * config/rl78/rl78.md: New define_expand "umaxdi3".

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>
        
        * config/rl78/rl78.c (rl78_note_reg_set): fixed dead reg check 
        for non-QImode registers

2018-01-22  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83963
        * graphite-scop-detection.c (scop_detection::get_sese): Delay
        including the loop exit block.
        (scop_detection::merge_sese): Likewise.
        (scop_detection::add_scop): Do it here instead.

2018-01-22  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        * doc/sourcebuild.texi (arm_softfloat): Document.

2018-01-21  John David Anglin  <danglin@gcc.gnu.org>

        PR gcc/77734
        * config/pa/pa.c (pa_function_ok_for_sibcall): Use
        targetm.binds_local_p instead of TREE_PUBLIC to check local binding.
        Move TARGET_PORTABLE_RUNTIME check after TARGET_64BIT check.

2018-01-21  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
            David Edelsohn <dje.gcc@gmail.com>

        PR target/83946
        * config/rs6000/rs6000.md (*call_indirect_nonlocal_sysv<mode>):
        Change "crset eq" to "crset 2".
        (*call_value_indirect_nonlocal_sysv<mode>): Likewise.
        (*call_indirect_aix<mode>_nospec): Likewise.
        (*call_value_indirect_aix<mode>_nospec): Likewise.
        (*call_indirect_elfv2<mode>_nospec): Likewise.
        (*call_value_indirect_elfv2<mode>_nospec): Likewise.
        (*sibcall_nonlocal_sysv<mode>): Change "crset eq" to "crset 2";
        change assembly output from . to $.
        (*sibcall_value_nonlocal_sysv<mode>): Likewise.
        (indirect_jump<mode>_nospec): Change assembly output from . to $.
        (*tablejump<mode>_internal1_nospec): Likewise.

2018-01-21  Oleg Endo  <olegendo@gcc.gnu.org>

        PR target/80870
        * config/sh/sh_optimize_sett_clrt.cc:
        Use INCLUDE_ALGORITHM and INCLUDE_VECTOR instead of direct includes.

2018-01-20  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83940
        * tree-vect-stmts.c (vect_truncate_gather_scatter_offset): Set
        offset_dt to vect_constant_def rather than vect_unknown_def_type.
        (vect_check_load_store_mask): Add a mask_dt_out parameter and
        use it to pass back the definition type.
        (vect_check_store_rhs): Likewise rhs_dt_out.
        (vect_build_gather_load_calls): Add a mask_dt argument and use
        it instead of a call to vect_is_simple_use.
        (vectorizable_store): Update calls to vect_check_load_store_mask
        and vect_check_store_rhs.  Use the dt returned by the latter instead
        of scatter_src_dt.  Use the cached mask_dt and gs_info.offset_dt
        instead of calls to vect_is_simple_use.  Pass the scalar rather
        than the vector operand to vect_is_simple_use when handling
        second and subsequent copies of an rhs value.
        (vectorizable_load): Update calls to vect_check_load_store_mask
        and vect_build_gather_load_calls.  Use the cached mask_dt and
        gs_info.offset_dt instead of calls to vect_is_simple_use.

2018-01-20  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/83945
        * tree-emutls.c: Include gimplify.h.
        (lower_emutls_2): New function.
        (lower_emutls_1): If ADDR_EXPR is a gimple invariant and walk_tree
        with lower_emutls_2 callback finds some TLS decl in it, unshare_expr
        it before further processing.

        PR target/83930
        * simplify-rtx.c (simplify_binary_operation_1) <case UMOD>: Use
        UINTVAL (trueop1) instead of INTVAL (op1).

2018-01-19  Jakub Jelinek  <jakub@redhat.com>

        PR debug/81570
        PR debug/83728
        * dwarf2cfi.c (DEFAULT_INCOMING_FRAME_SP_OFFSET): Define to
        INCOMING_FRAME_SP_OFFSET if not defined.
        (scan_trace): Add ENTRY argument.  If true and
        DEFAULT_INCOMING_FRAME_SP_OFFSET != INCOMING_FRAME_SP_OFFSET,
        emit a note to adjust the CFA offset.
        (create_cfi_notes): Adjust scan_trace callers.
        (create_cie_data): Use DEFAULT_INCOMING_FRAME_SP_OFFSET rather than
        INCOMING_FRAME_SP_OFFSET in the CIE.
        * config/i386/i386.h (DEFAULT_INCOMING_FRAME_SP_OFFSET): Define.
        * config/stormy16/stormy16.h (DEFAULT_INCOMING_FRAME_SP_OFFSET):
        Likewise.
        * doc/tm.texi.in (DEFAULT_INCOMING_FRAME_SP_OFFSET): Document.
        * doc/tm.texi: Regenerated.

2018-01-19  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

        PR rtl-optimization/83147
        * lra-constraints.c (remove_inheritance_pseudos): Use
        lra_substitute_pseudo_within_insn.

2018-01-19  Tom de Vries  <tom@codesourcery.com>
            Cesar Philippidis  <cesar@codesourcery.com>

        PR target/83920
        * config/nvptx/nvptx.c (nvptx_single): Fix jit workaround.

2018-01-19  Cesar Philippidis  <cesar@codesourcery.com>

        PR target/83790
        * config/nvptx/nvptx.c (output_init_frag): Don't use generic address
        spaces for function labels.

2018-01-19  Martin Liska  <mliska@suse.cz>

        * predict.def (PRED_LOOP_EXIT): Change from 85 to 89.
        (PRED_LOOP_EXIT_WITH_RECURSION): Change from 72 to 78.
        (PRED_LOOP_EXTRA_EXIT): Change from 83 to 67.
        (PRED_OPCODE_POSITIVE): Change from 64 to 59.
        (PRED_TREE_OPCODE_POSITIVE): Change from 64 to 59.
        (PRED_CONST_RETURN): Change from 69 to 65.
        (PRED_NULL_RETURN): Change from 91 to 71.
        (PRED_LOOP_IV_COMPARE_GUESS): Change from 98 to 64.
        (PRED_LOOP_GUARD): Change from 66 to 73.

2018-01-19  Martin Liska  <mliska@suse.cz>

        * predict.c (predict_insn_def): Add new assert.
        (struct branch_predictor): Change type to signed integer.
        (test_prediction_value_range): Amend test to cover
        PROB_UNINITIALIZED.
        * predict.def (PRED_LOOP_ITERATIONS): Use the new constant.
        (PRED_LOOP_ITERATIONS_GUESSED): Likewise.
        (PRED_LOOP_ITERATIONS_MAX): Likewise.
        (PRED_LOOP_IV_COMPARE): Likewise.
        * predict.h (PROB_UNINITIALIZED): Define new constant.

2018-01-19  Martin Liska  <mliska@suse.cz>

        * predict.c (dump_prediction): Add new format for
        analyze_brprob.py script which is enabled with -details
        suboption.
        * profile-count.h (precise_p): New function.

2018-01-19  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83922
        * tree-vect-loop.c (vect_verify_full_masking): Return false if
        there are no statements that need masking.
        (vect_active_double_reduction_p): New function.
        (vect_analyze_loop_operations): Use it when handling phis that
        are not in the loop header.

2018-01-19  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83914
        * tree-vect-loop.c (vectorizable_induction): Don't convert
        init_expr or apply the peeling adjustment for inductions
        that are nested within the vectorized loop.

2018-01-19  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        * config/arm/thumb2.md (*thumb2_negsi2_short): Use RSB mnemonic
        instead of NEG.

2018-01-18  Jakub Jelinek  <jakub@redhat.com>

        PR sanitizer/81715
        PR testsuite/83882
        * function.h (gimplify_parameters): Add gimple_seq * argument.
        * function.c: Include gimple.h and options.h.
        (gimplify_parameters): Add cleanup argument, add CLOBBER stmts
        for the added local temporaries if needed.
        * gimplify.c (gimplify_body): Adjust gimplify_parameters caller,
        if there are any parameter cleanups, wrap whole body into a
        try/finally with the cleanups.

2018-01-18  Wilco Dijkstra  <wdijkstr@arm.com>

        PR target/82964
        * config/aarch64/aarch64.c (aarch64_legitimate_constant_p):
        Use GET_MODE_CLASS for scalar floating point.

2018-01-18  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/82256
        patch by PaX Team
        * cgraphclones.c (cgraph_node::create_version_clone_with_body):
        Fix call of call_cgraph_insertion_hooks.

2018-01-18  Martin Sebor  <msebor@redhat.com>

        * doc/invoke.texi (-Wclass-memaccess): Tweak text.

2018-01-18  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/83619
        * cgraph.c (cgraph_edge::redirect_call_stmt_to_callee): Update edge
        frequencies.

2018-01-18  Boris Kolpackov  <boris@codesynthesis.com>

        PR other/70268
        * common.opt: (-ffile-prefix-map): New option.
        * opts.c (common_handle_option): Defer it.
        * opts-global.c (handle_common_deferred_options): Handle it.
        * debug.h (remap_debug_filename, add_debug_prefix_map): Move to...
        * file-prefix-map.h: New file.
        (remap_debug_filename, add_debug_prefix_map): ...here.
        (add_macro_prefix_map, add_file_prefix_map, remap_macro_filename): New.
        * final.c (debug_prefix_map, add_debug_prefix_map
        remap_debug_filename): Move to...
        * file-prefix-map.c: New file.
        (file_prefix_map, add_prefix_map, remap_filename) ...here and rename,
        generalize, get rid of alloca(), use strrchr() instead of strchr().
        (add_macro_prefix_map, add_debug_prefix_map, add_file_prefix_map):
        Implement in terms of add_prefix_map().
        (remap_macro_filename, remap_debug_filename): Implement in term of
        remap_filename().
        * Makefile.in (OBJS, PLUGIN_HEADERS): Add new files.
        * builtins.c (fold_builtin_FILE): Call remap_macro_filename().
        * dbxout.c: Include file-prefix-map.h.
        * varasm.c: Likewise.
        * vmsdbgout.c: Likewise.
        * xcoffout.c: Likewise.
        * dwarf2out.c: Likewise plus omit new options from DW_AT_producer.
        * doc/cppopts.texi (-fmacro-prefix-map): Document.
        * doc/invoke.texi (-ffile-prefix-map): Document.
        (-fdebug-prefix-map): Update description.

2018-01-18  Martin Liska  <mliska@suse.cz>

        * config/i386/i386.c (indirect_thunk_name): Document that also
        lfence is emitted.
        (output_indirect_thunk): Document why both instructions
        (pause and lfence) are generated.

2018-01-18  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83887
        * graphite-scop-detection.c
        (scop_detection::get_nearest_dom_with_single_entry): Remove.
        (scop_detection::get_nearest_pdom_with_single_exit): Likewise.
        (scop_detection::merge_sese): Re-implement with a flood-fill
        algorithm that properly finds a SESE region if it exists.

2018-01-18  Jakub Jelinek  <jakub@redhat.com>

        PR c/61240
        * match.pd ((P + A) - P, P - (P + A), (P + A) - (P + B)): For
        pointer_diff optimizations use view_convert instead of convert.

2018-01-17  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        * config/rs6000/rs6000.md (*call_indirect_nonlocal_sysv<mode>):
        Generate different code for -mno-speculate-indirect-jumps.
        (*call_value_indirect_nonlocal_sysv<mode>): Likewise.
        (*call_indirect_aix<mode>): Disable for
        -mno-speculate-indirect-jumps.
        (*call_indirect_aix<mode>_nospec): New define_insn.
        (*call_value_indirect_aix<mode>): Disable for
        -mno-speculate-indirect-jumps.
        (*call_value_indirect_aix<mode>_nospec): New define_insn.
        (*sibcall_nonlocal_sysv<mode>): Generate different code for
        -mno-speculate-indirect-jumps.
        (*sibcall_value_nonlocal_sysv<mode>): Likewise.

2018-01-17  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * config/rs6000/rs6000.c (rs6000_emit_move): If we load or store a
        long double type, set the flags for noting the default long double
        type, even if we don't pass or return a long double type.

2018-01-17  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/83051
        * ipa-inline.c (flatten_function): Do not overwrite final inlining
        failure.

2018-01-17  Will Schmidt  <will_schmidt@vnet.ibm.com>

        * config/rs6000/rs6000.c (rs6000_gimple_builtin): Add gimple folding
        support for merge[hl].
        (fold_mergehl_helper): New helper function.
        (tree-vector-builder.h): New #include for tree_vector_builder usage.
        * config/rs6000/altivec.md (altivec_vmrghw_direct): Add xxmrghw insn.
        (altivec_vmrglw_direct): Add xxmrglw insn.

2018-01-17  Andrew Waterman  <andrew@sifive.com>

        * config/riscv/riscv.c (riscv_conditional_register_usage): If
        UNITS_PER_FP_ARG is 0, set call_used_regs to 1 for all FP regs.

2018-01-17  David Malcolm  <dmalcolm@redhat.com>

        PR lto/83121
        * ipa-devirt.c (add_type_duplicate): When comparing memory layout,
        call the lto_location_cache before reading the
        DECL_SOURCE_LOCATION of the types.

2018-01-17  Wilco Dijkstra  <wdijkstr@arm.com>
            Richard Sandiford  <richard.sandiford@linaro.org>

        * config/aarch64/aarch64.md (movti_aarch64): Use Uti constraint.
        * config/aarch64/aarch64.c (aarch64_mov128_immediate): New function.
        (aarch64_legitimate_constant_p): Just support CONST_DOUBLE
        SF/DF/TF mode to avoid creating illegal CONST_WIDE_INT immediates.
        * config/aarch64/aarch64-protos.h (aarch64_mov128_immediate):
        Add declaration.
        * config/aarch64/constraints.md (aarch64_movti_operand):
        Limit immediates.
        * config/aarch64/predicates.md (Uti): Add new constraint.

2018-01-17 Carl Love  <cel@us.ibm.com>
        * config/rs6000/vsx.md (define_expand xl_len_r,
        define_expand stxvl, define_expand *stxvl): Add match_dup argument.
        (define_insn): Add, match_dup 1 argument to define_insn stxvll and
        lxvll.
        (define_expand, define_insn): Move the shift left from  the
        define_insn to the define_expand for lxvl and stxvl instructions.
        * config/rs6000/rs6000-builtin.def (BU_P9V_64BIT_VSX_2): Change LXVL
        and XL_LEN_R definitions to PURE.

2018-01-17  Uros Bizjak  <ubizjak@gmail.com>

        * config/i386/i386.c (indirect_thunk_name): Declare regno
        as unsigned int.  Compare regno with INVALID_REGNUM.
        (output_indirect_thunk): Ditto.
        (output_indirect_thunk_function): Ditto.
        (ix86_code_end): Declare regno as unsigned int.  Use INVALID_REGNUM
        in the call to output_indirect_thunk_function.

2018-01-17  Richard Sandiford  <richard.sandiford@linaro.org>

        PR middle-end/83884
        * expr.c (expand_expr_real_1): Use the size of GET_MODE (op0)
        rather than the size of inner_type to determine the stack slot size
        when handling VIEW_CONVERT_EXPRs on strict-alignment targets.

2018-01-16  Sebastian Peryt  <sebastian.peryt@intel.com>

        PR target/83546
        * config/i386/i386.c (ix86_option_override_internal): Add PTA_RDRND
        to PTA_SILVERMONT.

2018-01-16  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * config.gcc (powerpc*-linux*-*): Add support for 64-bit little
        endian Linux systems to optionally enable multilibs for selecting
        the long double type if the user configured an explicit type.
        * config/rs6000/rs6000.h (TARGET_IEEEQUAD_MULTILIB): Indicate we
        have no long double multilibs if not defined.
        * config/rs6000/rs6000.c (rs6000_option_override_internal): Do not
        warn if the user used -mabi={ieee,ibm}longdouble and we built
        multilibs for long double.
        * config/rs6000/linux64.h (MULTILIB_DEFAULTS_IEEE): Define as the
        appropriate multilib option.
        (MULTILIB_DEFAULTS): Add MULTILIB_DEFAULTS_IEEE to the default
        multilib options.
        * config/rs6000/t-ldouble-linux64le-ibm: New configuration files
        for building long double multilibs.
        * config/rs6000/t-ldouble-linux64le-ieee: Likewise.

2018-01-16  John David Anglin  <danglin@gcc.gnu.org>

        * config.gcc (hppa*-*-linux*): Change callee copies ABI to caller
        copies.

        * config/pa.h (MALLOC_ABI_ALIGNMENT): Set 32-bit alignment default to
        64 bits.
        * config/pa/pa32-linux.h (MALLOC_ABI_ALIGNMENT): Set alignment to
        128 bits.

        * config/pa/som.h (ASM_DECLARE_FUNCTION_NAME): Cleanup type and mode
        variables.

        * config/pa/pa.c (pa_function_arg_size): Apply CEIL to GET_MODE_SIZE
        return value.

2018-01-16  Eric Botcazou  <ebotcazou@adacore.com>

        * gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): For an
        ADDR_EXPR, do not count the offset of a COMPONENT_REF twice.

2018-01-16  Kelvin Nilsen  <kelvin@gcc.gnu.org>

        * config/rs6000/rs6000-p8swap.c (rs6000_gen_stvx): Generate
        different rtl trees depending on TARGET_64BIT.
        (rs6000_gen_lvx): Likewise.

2018-01-16  Eric Botcazou  <ebotcazou@adacore.com>

        * config/visium/visium.md (nop): Tweak comment.
        (hazard_nop): Likewise.

2018-01-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        * config/rs6000/rs6000.c (rs6000_opt_vars): Add entry for
        -mspeculate-indirect-jumps.
        * config/rs6000/rs6000.md (*call_indirect_elfv2<mode>): Disable
        for -mno-speculate-indirect-jumps.
        (*call_indirect_elfv2<mode>_nospec): New define_insn.
        (*call_value_indirect_elfv2<mode>): Disable for
        -mno-speculate-indirect-jumps.
        (*call_value_indirect_elfv2<mode>_nospec): New define_insn.
        (indirect_jump): Emit different RTL for
        -mno-speculate-indirect-jumps.
        (*indirect_jump<mode>): Disable for
        -mno-speculate-indirect-jumps.
        (*indirect_jump<mode>_nospec): New define_insn.
        (tablejump): Emit different RTL for
        -mno-speculate-indirect-jumps.
        (tablejumpsi): Disable for -mno-speculate-indirect-jumps.
        (tablejumpsi_nospec): New define_expand.
        (tablejumpdi): Disable for -mno-speculate-indirect-jumps.
        (tablejumpdi_nospec): New define_expand.
        (*tablejump<mode>_internal1): Disable for
        -mno-speculate-indirect-jumps.
        (*tablejump<mode>_internal1_nospec): New define_insn.
        * config/rs6000/rs6000.opt (mspeculate-indirect-jumps): New
        option.

2018-01-16  Artyom Skrobov tyomitch@gmail.com

        * caller-save.c (insert_save): Drop unnecessary parameter.  All
        callers updated.

2018-01-16  Jakub Jelinek  <jakub@redhat.com>
            Richard Biener  <rguenth@suse.de>

        PR libgomp/83590
        * gimplify.c (gimplify_one_sizepos): For is_gimple_constant (expr)
        return early, inline manually is_gimple_sizepos.  Make sure if we
        call gimplify_expr we don't end up with a gimple constant.
        * tree.c (variably_modified_type_p): Don't return true for
        is_gimple_constant (_t).  Inline manually is_gimple_sizepos.
        * gimplify.h (is_gimple_sizepos): Remove.

2018-01-16  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83857
        * tree-vect-loop.c (vect_analyze_loop_operations): Don't call
        vectorizable_live_operation for pure SLP statements.
        (vectorizable_live_operation): Handle PHIs.

2018-01-16  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83867
        * tree-vect-stmts.c (vect_transform_stmt): Precompute
        nested_in_vect_loop_p since the scalar stmt may get invalidated.

2018-01-16  Jakub Jelinek  <jakub@redhat.com>

        PR c/83844
        * stor-layout.c (handle_warn_if_not_align): Use byte_position and
        multiple_of_p instead of unchecked tree_to_uhwi and UHWI check.
        If off is not INTEGER_CST, issue a may not be aligned warning
        rather than isn't aligned.  Use isn%'t rather than isn't.
        * fold-const.c (multiple_of_p) <case BIT_AND_EXPR>: Don't fall through
        into MULT_EXPR.
        <case MULT_EXPR>: Improve the case when bottom and one of the
        MULT_EXPR operands are INTEGER_CSTs and bottom is multiple of that
        operand, in that case check if the other operand is multiple of
        bottom divided by the INTEGER_CST operand.

2018-01-16  Richard Sandiford  <richard.sandiford@linaro.org>

        PR target/83858
        * config/pa/pa.h (FUNCTION_ARG_SIZE): Delete.
        * config/pa/pa-protos.h (pa_function_arg_size): Declare.
        * config/pa/som.h (ASM_DECLARE_FUNCTION_NAME): Use
        pa_function_arg_size instead of FUNCTION_ARG_SIZE.
        * config/pa/pa.c (pa_function_arg_advance): Likewise.
        (pa_function_arg, pa_arg_partial_bytes): Likewise.
        (pa_function_arg_size): New function.

2018-01-16  Richard Sandiford  <richard.sandiford@linaro.org>

        * fold-const.c (fold_ternary_loc): Construct the vec_perm_indices
        in a separate statement.

2018-01-16  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83847
        * tree-vect-data-refs.c (vect_analyze_data_ref_accesses): Don't
        group gathers and scatters.

2018-01-16  Jakub Jelinek  <jakub@redhat.com>

        PR rtl-optimization/86620
        * params.def (max-sched-ready-insns): Bump minimum value to 1.

        PR rtl-optimization/83213
        * recog.c (peep2_attempt): Copy over CROSSING_JUMP_P from peepinsn
        to last if both are JUMP_INSNs.

        PR tree-optimization/83843
        * gimple-ssa-store-merging.c
        (imm_store_chain_info::output_merged_store): Handle bit_not_p on
        store_immediate_info for bswap/nop orig_stores.

2018-01-15  Andrew Waterman  <andrew@sifive.com>

        * config/riscv/riscv.c (riscv_rtx_costs) <MULT>: Increase cost if
        !TARGET_MUL.
        <UDIV>: Increase cost if !TARGET_DIV.

2018-01-15  Segher Boessenkool  <segher@kernel.crashing.org>

        * config/rs6000/rs6000.md (define_attr "type"): Remove delayed_cr.
        (define_attr "cr_logical_3op"): New.
        (cceq_ior_compare): Adjust.
        (cceq_ior_compare_complement): Adjust.
        (*cceq_rev_compare): Adjust.
        * config/rs6000/rs6000.c (rs6000_adjust_cost): Adjust.
        (is_cracked_insn): Adjust.
        (insn_must_be_first_in_group): Adjust.
        * config/rs6000/40x.md: Adjust.
        * config/rs6000/440.md: Adjust.
        * config/rs6000/476.md: Adjust.
        * config/rs6000/601.md: Adjust.
        * config/rs6000/603.md: Adjust.
        * config/rs6000/6xx.md: Adjust.
        * config/rs6000/7450.md: Adjust.
        * config/rs6000/7xx.md: Adjust.
        * config/rs6000/8540.md: Adjust.
        * config/rs6000/cell.md: Adjust.
        * config/rs6000/e300c2c3.md: Adjust.
        * config/rs6000/e500mc.md: Adjust.
        * config/rs6000/e500mc64.md: Adjust.
        * config/rs6000/e5500.md: Adjust.
        * config/rs6000/e6500.md: Adjust.
        * config/rs6000/mpc.md: Adjust.
        * config/rs6000/power4.md: Adjust.
        * config/rs6000/power5.md: Adjust.
        * config/rs6000/power6.md: Adjust.
        * config/rs6000/power7.md: Adjust.
        * config/rs6000/power8.md: Adjust.
        * config/rs6000/power9.md: Adjust.
        * config/rs6000/rs64.md: Adjust.
        * config/rs6000/titan.md: Adjust.

2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/predicates.md (indirect_branch_operand): Rewrite
        ix86_indirect_branch_register logic.

2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/constraints.md (Bs): Update
        ix86_indirect_branch_register check.  Don't check
        ix86_indirect_branch_register with GOT_memory_operand.
        (Bw): Likewise.
        * config/i386/predicates.md (GOT_memory_operand): Don't check
        ix86_indirect_branch_register here.
        (GOT32_symbol_operand): Likewise.

2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/predicates.md (constant_call_address_operand):
        Rewrite ix86_indirect_branch_register logic.
        (sibcall_insn_operand): Likewise.

2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/constraints.md (Bs): Replace
        ix86_indirect_branch_thunk_register with
        ix86_indirect_branch_register.
        (Bw): Likewise.
        * config/i386/i386.md (indirect_jump): Likewise.
        (tablejump): Likewise.
        (*sibcall_memory): Likewise.
        (*sibcall_value_memory): Likewise.
        Peepholes of indirect call and jump via memory: Likewise.
        * config/i386/i386.opt: Likewise.
        * config/i386/predicates.md (indirect_branch_operand): Likewise.
        (GOT_memory_operand): Likewise.
        (call_insn_operand): Likewise.
        (sibcall_insn_operand): Likewise.
        (GOT32_symbol_operand): Likewise.

2018-01-15  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/83837
        * omp-expand.c (expand_omp_atomic_pipeline): Use loaded_val
        type rather than type addr's type points to.
        (expand_omp_atomic_mutex): Likewise.
        (expand_omp_atomic): Likewise.

2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/83839
        * config/i386/i386.c (output_indirect_thunk_function): Use
        ASM_OUTPUT_LABEL, instead of ASM_OUTPUT_DEF, for TARGET_MACHO
        for  __x86_return_thunk.

2018-01-15  Richard Biener  <rguenther@suse.de>

        PR middle-end/83850
        * expmed.c (extract_bit_field_1): Fix typo.

2018-01-15  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        PR target/83687
        * config/arm/iterators.md (VF): New mode iterator.
        * config/arm/neon.md (neon_vabd<mode>_2): Use the above.
        Remove integer-related logic from pattern.
        (neon_vabd<mode>_3): Likewise.

2018-01-15  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/82694
        * common.opt (fstrict-overflow): No longer an alias.
        (fwrapv-pointer): New option.
        * tree.h (TYPE_OVERFLOW_WRAPS, TYPE_OVERFLOW_UNDEFINED): Define
        also for pointer types based on flag_wrapv_pointer.
        * opts.c (common_handle_option) <case OPT_fstrict_overflow>: Set
        opts->x_flag_wrap[pv] to !value, clear opts->x_flag_trapv if
        opts->x_flag_wrapv got set.
        * fold-const.c (fold_comparison, fold_binary_loc): Revert 2017-08-01
        changes, just use TYPE_OVERFLOW_UNDEFINED on pointer type instead of
        POINTER_TYPE_OVERFLOW_UNDEFINED.
        * match.pd: Likewise in address comparison pattern.
        * doc/invoke.texi: Document -fwrapv and -fstrict-overflow.

2018-01-15  Richard Biener  <rguenther@suse.de>

        PR lto/83804
        * tree.c (free_lang_data_in_type): Always unlink TYPE_DECLs
        from TYPE_FIELDS.  Free TYPE_BINFO if not used by devirtualization.
        Reset type names to their identifier if their TYPE_DECL doesn't
        have linkage (and thus is used for ODR and devirt).
        (save_debug_info_for_decl): Remove.
        (save_debug_info_for_type): Likewise.
        (add_tree_to_fld_list): Adjust.
        * tree-pretty-print.c (dump_generic_node): Make dumping of
        type names more robust.

2018-01-15  Richard Biener  <rguenther@suse.de>

        * BASE-VER: Bump to 8.0.1.

2018-01-14  Martin Sebor  <msebor@redhat.com>

        PR other/83508
        * builtins.c (check_access): Avoid warning when the no-warning bit
        is set.

2018-01-14  Cory Fields  <cory-nospam-@coryfields.com>

        * tree-ssa-loop-im.c (sort_bbs_in_loop_postorder_cmp): Stabilize sort.
        * ira-color (allocno_hard_regs_compare): Likewise.

2018-01-14  Nathan Rossi  <nathan@nathanrossi.com>

        PR target/83013
        * config/microblaze/microblaze.c (microblaze_asm_output_ident):
        Use .pushsection/.popsection.

2018-01-14  Martin Sebor  <msebor@redhat.com>

        PR c++/81327
        * doc/invoke.texi (-Wlass-memaccess): Document suppression by casting.

2018-01-14  Jakub Jelinek  <jakub@redhat.com>

        * config.gcc (i[34567]86-*-*): Remove one duplicate gfniintrin.h
        entry from extra_headers.
        (x86_64-*-*): Remove two duplicate gfniintrin.h entries from
        extra_headers, make the list bitwise identical to the i?86-*-* one.

2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/i386.c (ix86_set_indirect_branch_type): Disallow
        -mcmodel=large with -mindirect-branch=thunk,
        -mindirect-branch=thunk-extern, -mfunction-return=thunk and
        -mfunction-return=thunk-extern.
        * doc/invoke.texi: Document -mcmodel=large is incompatible with
        -mindirect-branch=thunk, -mindirect-branch=thunk-extern,
        -mfunction-return=thunk and -mfunction-return=thunk-extern.

2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/i386.c (print_reg): Print the name of the full
        integer register without '%'.
        (ix86_print_operand): Handle 'V'.
         * doc/extend.texi: Document 'V' modifier.

2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/constraints.md (Bs): Disallow memory operand for
        -mindirect-branch-register.
        (Bw): Likewise.
        * config/i386/predicates.md (indirect_branch_operand): Likewise.
        (GOT_memory_operand): Likewise.
        (call_insn_operand): Likewise.
        (sibcall_insn_operand): Likewise.
        (GOT32_symbol_operand): Likewise.
        * config/i386/i386.md (indirect_jump): Call convert_memory_address
        for -mindirect-branch-register.
        (tablejump): Likewise.
        (*sibcall_memory): Likewise.
        (*sibcall_value_memory): Likewise.
        Disallow peepholes of indirect call and jump via memory for
        -mindirect-branch-register.
        (*call_pop): Replace m with Bw.
        (*call_value_pop): Likewise.
        (*sibcall_pop_memory): Replace m with Bs.
        * config/i386/i386.opt (mindirect-branch-register): New option.
        * doc/invoke.texi: Document -mindirect-branch-register option.

2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/i386-protos.h (ix86_output_function_return): New.
        * config/i386/i386.c (ix86_set_indirect_branch_type): Also
        set function_return_type.
        (indirect_thunk_name): Add ret_p to indicate thunk for function
        return.
        (output_indirect_thunk_function): Pass false to
        indirect_thunk_name.
        (ix86_output_indirect_branch_via_reg): Likewise.
        (ix86_output_indirect_branch_via_push): Likewise.
        (output_indirect_thunk_function): Create alias for function
        return thunk if regno < 0.
        (ix86_output_function_return): New function.
        (ix86_handle_fndecl_attribute): Handle function_return.
        (ix86_attribute_table): Add function_return.
        * config/i386/i386.h (machine_function): Add
        function_return_type.
        * config/i386/i386.md (simple_return_internal): Use
        ix86_output_function_return.
        (simple_return_internal_long): Likewise.
        * config/i386/i386.opt (mfunction-return=): New option.
        (indirect_branch): Mention -mfunction-return=.
        * doc/extend.texi: Document function_return function attribute.
        * doc/invoke.texi: Document -mfunction-return= option.

2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/i386-opts.h (indirect_branch): New.
        * config/i386/i386-protos.h (ix86_output_indirect_jmp): Likewise.
        * config/i386/i386.c (ix86_using_red_zone): Disallow red-zone
        with local indirect jump when converting indirect call and jump.
        (ix86_set_indirect_branch_type): New.
        (ix86_set_current_function): Call ix86_set_indirect_branch_type.
        (indirectlabelno): New.
        (indirect_thunk_needed): Likewise.
        (indirect_thunk_bnd_needed): Likewise.
        (indirect_thunks_used): Likewise.
        (indirect_thunks_bnd_used): Likewise.
        (INDIRECT_LABEL): Likewise.
        (indirect_thunk_name): Likewise.
        (output_indirect_thunk): Likewise.
        (output_indirect_thunk_function): Likewise.
        (ix86_output_indirect_branch_via_reg): Likewise.
        (ix86_output_indirect_branch_via_push): Likewise.
        (ix86_output_indirect_branch): Likewise.
        (ix86_output_indirect_jmp): Likewise.
        (ix86_code_end): Call output_indirect_thunk_function if needed.
        (ix86_output_call_insn): Call ix86_output_indirect_branch if
        needed.
        (ix86_handle_fndecl_attribute): Handle indirect_branch.
        (ix86_attribute_table): Add indirect_branch.
        * config/i386/i386.h (machine_function): Add indirect_branch_type
        and has_local_indirect_jump.
        * config/i386/i386.md (indirect_jump): Set has_local_indirect_jump
        to true.
        (tablejump): Likewise.
        (*indirect_jump): Use ix86_output_indirect_jmp.
        (*tablejump_1): Likewise.
        (simple_return_indirect_internal): Likewise.
        * config/i386/i386.opt (mindirect-branch=): New option.
        (indirect_branch): New.
        (keep): Likewise.
        (thunk): Likewise.
        (thunk-inline): Likewise.
        (thunk-extern): Likewise.
        * doc/extend.texi: Document indirect_branch function attribute.
        * doc/invoke.texi: Document -mindirect-branch= option.

2018-01-14  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/83051
        * ipa-inline.c (edge_badness): Tolerate roundoff errors.

2018-01-14  Richard Sandiford  <richard.sandiford@linaro.org>

        * ipa-inline.c (want_inline_small_function_p): Return false if
        inlining has already failed with CIF_FINAL_ERROR.
        (update_caller_keys): Call want_inline_small_function_p before
        can_inline_edge_p.
        (update_callee_keys): Likewise.

2018-01-10  Kelvin Nilsen  <kelvin@gcc.gnu.org>

        * config/rs6000/rs6000-p8swap.c (rs6000_sum_of_two_registers_p):
        New function.
        (rs6000_quadword_masked_address_p): Likewise.
        (quad_aligned_load_p): Likewise.
        (quad_aligned_store_p): Likewise.
        (const_load_sequence_p): Add comment to describe the outer-most loop.
        (mimic_memory_attributes_and_flags): New function.
        (rs6000_gen_stvx): Likewise.
        (replace_swapped_aligned_store): Likewise.
        (rs6000_gen_lvx): Likewise.
        (replace_swapped_aligned_load): Likewise.
        (replace_swapped_load_constant): Capitalize argument name in
        comment describing this function.
        (rs6000_analyze_swaps): Add a third pass to search for vector loads
        and stores that access quad-word aligned addresses and replace
        with stvx or lvx instructions when appropriate.
        * config/rs6000/rs6000-protos.h (rs6000_sum_of_two_registers_p):
        New function prototype.
        (rs6000_quadword_masked_address_p): Likewise.
        (rs6000_gen_lvx): Likewise.
        (rs6000_gen_stvx): Likewise.
        * config/rs6000/vsx.md (*vsx_le_perm_load_<mode>): For modes
        VSX_D (V2DF, V2DI), modify this split to select lvx instruction
        when memory address is aligned.
        (*vsx_le_perm_load_<mode>): For modes VSX_W (V4SF, V4SI), modify
        this split to select lvx instruction when memory address is aligned.
        (*vsx_le_perm_load_v8hi): Modify this split to select lvx
        instruction when memory address is aligned.
        (*vsx_le_perm_load_v16qi): Likewise.
        (four unnamed splitters): Modify to select the stvx instruction
        when memory is aligned.

2018-01-13  Jan Hubicka  <hubicka@ucw.cz>

        * predict.c (determine_unlikely_bbs): Handle correctly BBs
        which appears in the queue multiple times.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (vec_lower_bound): New structure.
        (_loop_vec_info): Add check_nonzero and lower_bounds.
        (LOOP_VINFO_CHECK_NONZERO): New macro.
        (LOOP_VINFO_LOWER_BOUNDS): Likewise.
        (LOOP_REQUIRES_VERSIONING_FOR_ALIAS): Check lower_bounds too.
        * tree-data-ref.h (dr_with_seg_len): Add access_size and align
        fields.  Make seg_len the distance travelled, not including the
        access size.
        (dr_direction_indicator): Declare.
        (dr_zero_step_indicator): Likewise.
        (dr_known_forward_stride_p): Likewise.
        * tree-data-ref.c: Include stringpool.h, tree-vrp.h and
        tree-ssanames.h.
        (runtime_alias_check_p): Allow runtime alias checks with
        variable strides.
        (operator ==): Compare access_size and align.
        (prune_runtime_alias_test_list): Rework for new distinction between
        the access_size and seg_len.
        (create_intersect_range_checks_index): Likewise.  Cope with polynomial
        segment lengths.
        (get_segment_min_max): New function.
        (create_intersect_range_checks): Use it.
        (dr_step_indicator): New function.
        (dr_direction_indicator): Likewise.
        (dr_zero_step_indicator): Likewise.
        (dr_known_forward_stride_p): Likewise.
        * tree-loop-distribution.c (data_ref_segment_size): Return
        DR_STEP * (niters - 1).
        (compute_alias_check_pairs): Update call to the dr_with_seg_len
        constructor.
        * tree-vect-data-refs.c (vect_check_nonzero_value): New function.
        (vect_preserves_scalar_order_p): New function, split out from...
        (vect_analyze_data_ref_dependence): ...here.  Check for zero steps.
        (vect_vfa_segment_size): Return DR_STEP * (length_factor - 1).
        (vect_vfa_access_size): New function.
        (vect_vfa_align): Likewise.
        (vect_compile_time_alias): Take access_size_a and access_b arguments.
        (dump_lower_bound): New function.
        (vect_check_lower_bound): Likewise.
        (vect_small_gap_p): Likewise.
        (vectorizable_with_step_bound_p): Likewise.
        (vect_prune_runtime_alias_test_list): Ignore cross-iteration
        depencies if the vectorization factor is 1.  Convert the checks
        for nonzero steps into checks on the bounds of DR_STEP.  Try using
        a bunds check for variable steps if the minimum required step is
        relatively small. Update calls to the dr_with_seg_len
        constructor and to vect_compile_time_alias.
        * tree-vect-loop-manip.c (vect_create_cond_for_lower_bounds): New
        function.
        (vect_loop_versioning): Call it.
        * tree-vect-loop.c (vect_analyze_loop_2): Clear LOOP_VINFO_LOWER_BOUNDS
        when retrying.
        (vect_estimate_min_profitable_iters): Account for any bounds checks.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/sourcebuild.texi (vect_scatter_store): Document.
        * optabs.def (scatter_store_optab, mask_scatter_store_optab): New
        optabs.
        * doc/md.texi (scatter_store@var{m}, mask_scatter_store@var{m}):
        Document.
        * genopinit.c (main): Add supports_vec_scatter_store and
        supports_vec_scatter_store_cached to target_optabs.
        * gimple.h (gimple_expr_type): Handle IFN_SCATTER_STORE and
        IFN_MASK_SCATTER_STORE.
        * internal-fn.def (SCATTER_STORE, MASK_SCATTER_STORE): New internal
        functions.
        * internal-fn.h (internal_store_fn_p): Declare.
        (internal_fn_stored_value_index): Likewise.
        * internal-fn.c (scatter_store_direct): New macro.
        (expand_scatter_store_optab_fn): New function.
        (direct_scatter_store_optab_supported_p): New macro.
        (internal_store_fn_p): New function.
        (internal_gather_scatter_fn_p): Handle IFN_SCATTER_STORE and
        IFN_MASK_SCATTER_STORE.
        (internal_fn_mask_index): Likewise.
        (internal_fn_stored_value_index): New function.
        (internal_gather_scatter_fn_supported_p): Adjust operand numbers
        for scatter stores.
        * optabs-query.h (supports_vec_scatter_store_p): Declare.
        * optabs-query.c (supports_vec_scatter_store_p): New function.
        * tree-vectorizer.h (vect_get_store_rhs): Declare.
        * tree-vect-data-refs.c (vect_analyze_data_ref_access): Return
        true for scatter stores.
        (vect_gather_scatter_fn_p): Handle scatter stores too.
        (vect_check_gather_scatter): Consider using scatter stores if
        supports_vec_scatter_store_p.
        * tree-vect-patterns.c (vect_try_gather_scatter_pattern): Handle
        scatter stores too.
        * tree-vect-stmts.c (exist_non_indexing_operands_for_use_p): Use
        internal_fn_stored_value_index.
        (check_load_store_masking): Handle scatter stores too.
        (vect_get_store_rhs): Make public.
        (vectorizable_call): Use internal_store_fn_p.
        (vectorizable_store): Handle scatter store internal functions.
        (vect_transform_stmt): Compare GROUP_STORE_COUNT with GROUP_SIZE
        when deciding whether the end of the group has been reached.
        * config/aarch64/aarch64.md (UNSPEC_ST1_SCATTER): New unspec.
        * config/aarch64/aarch64-sve.md (scatter_store<mode>): New expander.
        (mask_scatter_store<mode>): New insns.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (vect_gather_scatter_fn_p): Declare.
        * tree-vect-data-refs.c (vect_gather_scatter_fn_p): Make public.
        * tree-vect-stmts.c (vect_truncate_gather_scatter_offset): New
        function.
        (vect_use_strided_gather_scatters_p): Take a masked_p argument.
        Use vect_truncate_gather_scatter_offset if we can't treat the
        operation as a normal gather load or scatter store.
        (get_group_load_store_type): Take the gather_scatter_info
        as argument.  Try using a gather load or scatter store for
        single-element groups.
        (get_load_store_type): Update calls to get_group_load_store_type
        and vect_use_strided_gather_scatters_p.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (vect_create_data_ref_ptr): Take an extra
        optional tree argument.
        * tree-vect-data-refs.c (vect_check_gather_scatter): Check for
        null target hooks.
        (vect_create_data_ref_ptr): Take the iv_step as an optional argument,
        but continue to use the current value as a fallback.
        (bump_vector_ptr): Use operand_equal_p rather than tree_int_cst_compare
        to compare the updates.
        * tree-vect-stmts.c (vect_use_strided_gather_scatters_p): New function.
        (get_load_store_type): Use it when handling a strided access.
        (vect_get_strided_load_store_ops): New function.
        (vect_get_data_ptr_increment): Likewise.
        (vectorizable_load): Handle strided gather loads.  Always pass
        a step to vect_create_data_ref_ptr and bump_vector_ptr.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/md.texi (gather_load@var{m}): Document.
        (mask_gather_load@var{m}): Likewise.
        * genopinit.c (main): Add supports_vec_gather_load and
        supports_vec_gather_load_cached to target_optabs.
        * optabs-tree.c (init_tree_optimization_optabs): Use
        ggc_cleared_alloc to allocate target_optabs.
        * optabs.def (gather_load_optab, mask_gather_laod_optab): New optabs.
        * internal-fn.def (GATHER_LOAD, MASK_GATHER_LOAD): New internal
        functions.
        * internal-fn.h (internal_load_fn_p): Declare.
        (internal_gather_scatter_fn_p): Likewise.
        (internal_fn_mask_index): Likewise.
        (internal_gather_scatter_fn_supported_p): Likewise.
        * internal-fn.c (gather_load_direct): New macro.
        (expand_gather_load_optab_fn): New function.
        (direct_gather_load_optab_supported_p): New macro.
        (direct_internal_fn_optab): New function.
        (internal_load_fn_p): Likewise.
        (internal_gather_scatter_fn_p): Likewise.
        (internal_fn_mask_index): Likewise.
        (internal_gather_scatter_fn_supported_p): Likewise.
        * optabs-query.c (supports_at_least_one_mode_p): New function.
        (supports_vec_gather_load_p): Likewise.
        * optabs-query.h (supports_vec_gather_load_p): Declare.
        * tree-vectorizer.h (gather_scatter_info): Add ifn, element_type
        and memory_type field.
        (NUM_PATTERNS): Bump to 15.
        * tree-vect-data-refs.c: Include internal-fn.h.
        (vect_gather_scatter_fn_p): New function.
        (vect_describe_gather_scatter_call): Likewise.
        (vect_check_gather_scatter): Try using internal functions for
        gather loads.  Recognize existing calls to a gather load function.
        (vect_analyze_data_refs): Consider using gather loads if
        supports_vec_gather_load_p.
        * tree-vect-patterns.c (vect_get_load_store_mask): New function.
        (vect_get_gather_scatter_offset_type): Likewise.
        (vect_convert_mask_for_vectype): Likewise.
        (vect_add_conversion_to_patterm): Likewise.
        (vect_try_gather_scatter_pattern): Likewise.
        (vect_recog_gather_scatter_pattern): New pattern recognizer.
        (vect_vect_recog_func_ptrs): Add it.
        * tree-vect-stmts.c (exist_non_indexing_operands_for_use_p): Use
        internal_fn_mask_index and internal_gather_scatter_fn_p.
        (check_load_store_masking): Take the gather_scatter_info as an
        argument and handle gather loads.
        (vect_get_gather_scatter_ops): New function.
        (vectorizable_call): Check internal_load_fn_p.
        (vectorizable_load): Likewise.  Handle gather load internal
        functions.
        (vectorizable_store): Update call to check_load_store_masking.
        * config/aarch64/aarch64.md (UNSPEC_LD1_GATHER): New unspec.
        * config/aarch64/iterators.md (SVE_S, SVE_D): New mode iterators.
        * config/aarch64/predicates.md (aarch64_gather_scale_operand_w)
        (aarch64_gather_scale_operand_d): New predicates.
        * config/aarch64/aarch64-sve.md (gather_load<mode>): New expander.
        (mask_gather_load<mode>): New insns.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * optabs.def (fold_left_plus_optab): New optab.
        * doc/md.texi (fold_left_plus_@var{m}): Document.
        * internal-fn.def (IFN_FOLD_LEFT_PLUS): New internal function.
        * internal-fn.c (fold_left_direct): Define.
        (expand_fold_left_optab_fn): Likewise.
        (direct_fold_left_optab_supported_p): Likewise.
        * fold-const-call.c (fold_const_fold_left): New function.
        (fold_const_call): Use it to fold CFN_FOLD_LEFT_PLUS.
        * tree-parloops.c (valid_reduction_p): New function.
        (gather_scalar_reductions): Use it.
        * tree-vectorizer.h (FOLD_LEFT_REDUCTION): New vect_reduction_type.
        (vect_finish_replace_stmt): Declare.
        * tree-vect-loop.c (fold_left_reduction_fn): New function.
        (needs_fold_left_reduction_p): New function, split out from...
        (vect_is_simple_reduction): ...here.  Accept reductions that
        forbid reassociation, but give them type FOLD_LEFT_REDUCTION.
        (vect_force_simple_reduction): Also store the reduction type in
        the assignment's STMT_VINFO_REDUC_TYPE.
        (vect_model_reduction_cost): Handle FOLD_LEFT_REDUCTION.
        (merge_with_identity): New function.
        (vect_expand_fold_left): Likewise.
        (vectorize_fold_left_reduction): Likewise.
        (vectorizable_reduction): Handle FOLD_LEFT_REDUCTION.  Leave the
        scalar phi in place for it.  Check for target support and reject
        cases that would reassociate the operation.  Defer the transform
        phase to vectorize_fold_left_reduction.
        * config/aarch64/aarch64.md (UNSPEC_FADDA): New unspec.
        * config/aarch64/aarch64-sve.md (fold_left_plus_<mode>): New expander.
        (*fold_left_plus_<mode>, *pred_fold_left_plus_<mode>): New insns.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-if-conv.c (predicate_mem_writes): Remove redundant
        call to ifc_temp_var.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.def (legitimize_address_displacement): Take the original
        offset as a poly_int.
        * targhooks.h (default_legitimize_address_displacement): Update
        accordingly.
        * targhooks.c (default_legitimize_address_displacement): Likewise.
        * doc/tm.texi: Regenerate.
        * lra-constraints.c (base_plus_disp_to_reg): Take the displacement
        as an argument, moving assert of ad->disp == ad->disp_term to...
        (process_address_1): ...here.  Update calls to base_plus_disp_to_reg.
        Try calling targetm.legitimize_address_displacement before expanding
        the address rather than afterwards, and adjust for the new interface.
        * config/aarch64/aarch64.c (aarch64_legitimize_address_displacement):
        Match the new hook interface.  Handle SVE addresses.
        * config/sh/sh.c (sh_legitimize_address_displacement): Make the
        new hook interface.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>

        * Makefile.in (OBJS): Add early-remat.o.
        * target.def (select_early_remat_modes): New hook.
        * doc/tm.texi.in (TARGET_SELECT_EARLY_REMAT_MODES): New hook.
        * doc/tm.texi: Regenerate.
        * targhooks.h (default_select_early_remat_modes): Declare.
        * targhooks.c (default_select_early_remat_modes): New function.
        * timevar.def (TV_EARLY_REMAT): New timevar.
        * passes.def (pass_early_remat): New pass.
        * tree-pass.h (make_pass_early_remat): Declare.
        * early-remat.c: New file.
        * config/aarch64/aarch64.c (aarch64_select_early_remat_modes): New
        function.
        (TARGET_SELECT_EARLY_REMAT_MODES): Define.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-loop-manip.c (vect_gen_scalar_loop_niters): Replace
        vfm1 with a bound_epilog parameter.
        (vect_do_peeling): Update calls accordingly, and move the prologue
        call earlier in the function.  Treat the base bound_epilog as 0 for
        fully-masked loops and retain vf - 1 for other loops.  Add 1 to
        this base when peeling for gaps.
        * tree-vect-loop.c (vect_analyze_loop_2): Allow peeling for gaps
        with fully-masked loops.
        (vect_estimate_min_profitable_iters): Handle the single peeled
        iteration in that case.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vect_analyze_group_access_1): Allow
        single-element interleaving even if the size is not a power of 2.
        * tree-vect-stmts.c (get_load_store_type): Disallow elementwise
        accesses for single-element interleaving if the group size is
        not a power of 2.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/md.texi (fold_extract_last_@var{m}): Document.
        * doc/sourcebuild.texi (vect_fold_extract_last): Likewise.
        * optabs.def (fold_extract_last_optab): New optab.
        * internal-fn.def (FOLD_EXTRACT_LAST): New internal function.
        * internal-fn.c (fold_extract_direct): New macro.
        (expand_fold_extract_optab_fn): Likewise.
        (direct_fold_extract_optab_supported_p): Likewise.
        * tree-vectorizer.h (EXTRACT_LAST_REDUCTION): New vect_reduction_type.
        * tree-vect-loop.c (vect_model_reduction_cost): Handle
        EXTRACT_LAST_REDUCTION.
        (get_initial_def_for_reduction): Do not create an initial vector
        for EXTRACT_LAST_REDUCTION reductions.
        (vectorizable_reduction): Leave the scalar phi in place for
        EXTRACT_LAST_REDUCTIONs.  Try using EXTRACT_LAST_REDUCTION
        ahead of INTEGER_INDUC_COND_REDUCTION.  Do not check for an
        epilogue code for EXTRACT_LAST_REDUCTION and defer the
        transform phase to vectorizable_condition.
        * tree-vect-stmts.c (vect_finish_stmt_generation_1): New function,
        split out from...
        (vect_finish_stmt_generation): ...here.
        (vect_finish_replace_stmt): New function.
        (vectorizable_condition): Handle EXTRACT_LAST_REDUCTION.
        * config/aarch64/aarch64-sve.md (fold_extract_last_<mode>): New
        pattern.
        * config/aarch64/aarch64.md (UNSPEC_CLASTB): New unspec.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/md.texi (extract_last_@var{m}): Document.
        * optabs.def (extract_last_optab): New optab.
        * internal-fn.def (EXTRACT_LAST): New internal function.
        * internal-fn.c (cond_unary_direct): New macro.
        (expand_cond_unary_optab_fn): Likewise.
        (direct_cond_unary_optab_supported_p): Likewise.
        * tree-vect-loop.c (vectorizable_live_operation): Allow fully-masked
        loops using EXTRACT_LAST.
        * config/aarch64/aarch64-sve.md (aarch64_sve_lastb<mode>): Rename to...
        (extract_last_<mode>): ...this optab.
        (vec_extract<mode><Vel>): Update accordingly.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.def (empty_mask_is_expensive): New hook.
        * doc/tm.texi.in (TARGET_VECTORIZE_EMPTY_MASK_IS_EXPENSIVE): New hook.
        * doc/tm.texi: Regenerate.
        * targhooks.h (default_empty_mask_is_expensive): Declare.
        * targhooks.c (default_empty_mask_is_expensive): New function.
        * tree-vectorizer.c (vectorize_loops): Only call optimize_mask_stores
        if the target says that empty masks are expensive.
        * config/aarch64/aarch64.c (aarch64_empty_mask_is_expensive):
        New function.
        (TARGET_VECTORIZE_EMPTY_MASK_IS_EXPENSIVE): Redefine.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (_loop_vec_info::mask_skip_niters): New field.
        (LOOP_VINFO_MASK_SKIP_NITERS): New macro.
        (vect_use_loop_mask_for_alignment_p): New function.
        (vect_prepare_for_masked_peels, vect_gen_while_not): Declare.
        * tree-vect-loop-manip.c (vect_set_loop_masks_directly): Add an
        niters_skip argument.  Make sure that the first niters_skip elements
        of the first iteration are inactive.
        (vect_set_loop_condition_masked): Handle LOOP_VINFO_MASK_SKIP_NITERS.
        Update call to vect_set_loop_masks_directly.
        (get_misalign_in_elems): New function, split out from...
        (vect_gen_prolog_loop_niters): ...here.
        (vect_update_init_of_dr): Take a code argument that specifies whether
        the adjustment should be added or subtracted.
        (vect_update_init_of_drs): Likewise.
        (vect_prepare_for_masked_peels): New function.
        (vect_do_peeling): Skip prologue peeling if we're using a mask
        instead.  Update call to vect_update_inits_of_drs.
        * tree-vect-loop.c (_loop_vec_info::_loop_vec_info): Initialize
        mask_skip_niters.
        (vect_analyze_loop_2): Allow fully-masked loops with peeling for
        alignment.  Do not include the number of peeled iterations in
        the minimum threshold in that case.
        (vectorizable_induction): Adjust the start value down by
        LOOP_VINFO_MASK_SKIP_NITERS iterations.
        (vect_transform_loop): Call vect_prepare_for_masked_peels.
        Take the number of skipped iterations into account when calculating
        the loop bounds.
        * tree-vect-stmts.c (vect_gen_while_not): New function.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/sourcebuild.texi (vect_fully_masked): Document.
        * params.def (PARAM_MIN_VECT_LOOP_BOUND): Change minimum and
        default value to 0.
        * tree-vect-loop.c (vect_analyze_loop_costing): New function,
        split out from...
        (vect_analyze_loop_2): ...here. Don't check the vectorization
        factor against the number of loop iterations if the loop is
        fully-masked.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-ssa-loop-ivopts.c (USE_ADDRESS): Split into...
        (USE_REF_ADDRESS, USE_PTR_ADDRESS): ...these new use types.
        (dump_groups): Update accordingly.
        (iv_use::mem_type): New member variable.
        (address_p): New function.
        (record_use): Add a mem_type argument and initialize the new
        mem_type field.
        (record_group_use): Add a mem_type argument.  Use address_p.
        Remove obsolete null checks of base_object.  Update call to record_use.
        (find_interesting_uses_op): Update call to record_group_use.
        (find_interesting_uses_cond): Likewise.
        (find_interesting_uses_address): Likewise.
        (get_mem_type_for_internal_fn): New function.
        (find_address_like_use): Likewise.
        (find_interesting_uses_stmt): Try find_address_like_use before
        calling find_interesting_uses_op.
        (addr_offset_valid_p): Use the iv mem_type field as the type
        of the addressed memory.
        (add_autoinc_candidates): Likewise.
        (get_address_cost): Likewise.
        (split_small_address_groups_p): Use address_p.
        (split_address_groups): Likewise.
        (add_iv_candidate_for_use): Likewise.
        (autoinc_possible_for_pair): Likewise.
        (rewrite_groups): Likewise.
        (get_use_type): Check for USE_REF_ADDRESS instead of USE_ADDRESS.
        (determine_group_iv_cost): Update after split of USE_ADDRESS.
        (get_alias_ptr_type_for_ptr_address): New function.
        (rewrite_use_address): Rewrite address uses in calls that were
        identified by find_address_like_use.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_expr_addr_expr_1): Handle ADDR_EXPRs of
        TARGET_MEM_REFs.
        * gimple-expr.h (is_gimple_addressable: Likewise.
        * gimple-expr.c (is_gimple_address): Likewise.
        * internal-fn.c (expand_call_mem_ref): New function.
        (expand_mask_load_optab_fn): Use it.
        (expand_mask_store_optab_fn): Likewise.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/md.texi (cond_add@var{mode}, cond_sub@var{mode})
        (cond_and@var{mode}, cond_ior@var{mode}, cond_xor@var{mode})
        (cond_smin@var{mode}, cond_smax@var{mode}, cond_umin@var{mode})
        (cond_umax@var{mode}): Document.
        * optabs.def (cond_add_optab, cond_sub_optab, cond_and_optab)
        (cond_ior_optab, cond_xor_optab, cond_smin_optab, cond_smax_optab)
        (cond_umin_optab, cond_umax_optab): New optabs.
        * internal-fn.def (COND_ADD, COND_SUB, COND_MIN, COND_MAX, COND_AND)
        (COND_IOR, COND_XOR): New internal functions.
        * internal-fn.h (get_conditional_internal_fn): Declare.
        * internal-fn.c (cond_binary_direct): New macro.
        (expand_cond_binary_optab_fn): Likewise.
        (direct_cond_binary_optab_supported_p): Likewise.
        (get_conditional_internal_fn): New function.
        * tree-vect-loop.c (vectorizable_reduction): Handle fully-masked loops.
        Cope with reduction statements that are vectorized as calls rather
        than assignments.
        * config/aarch64/aarch64-sve.md (cond_<optab><mode>): New insns.
        * config/aarch64/iterators.md (UNSPEC_COND_ADD, UNSPEC_COND_SUB)
        (UNSPEC_COND_SMAX, UNSPEC_COND_UMAX, UNSPEC_COND_SMIN)
        (UNSPEC_COND_UMIN, UNSPEC_COND_AND, UNSPEC_COND_ORR)
        (UNSPEC_COND_EOR): New unspecs.
        (optab): Add mappings for them.
        (SVE_COND_INT_OP, SVE_COND_FP_OP): New int iterators.
        (sve_int_op, sve_fp_op): New int attributes.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * optabs.def (while_ult_optab): New optab.
        * doc/md.texi (while_ult@var{m}@var{n}): Document.
        * internal-fn.def (WHILE_ULT): New internal function.
        * internal-fn.h (direct_internal_fn_supported_p): New override
        that takes two types as argument.
        * internal-fn.c (while_direct): New macro.
        (expand_while_optab_fn): New function.
        (convert_optab_supported_p): Likewise.
        (direct_while_optab_supported_p): New macro.
        * wide-int.h (wi::udiv_ceil): New function.
        * tree-vectorizer.h (rgroup_masks): New structure.
        (vec_loop_masks): New typedef.
        (_loop_vec_info): Add masks, mask_compare_type, can_fully_mask_p
        and fully_masked_p.
        (LOOP_VINFO_CAN_FULLY_MASK_P, LOOP_VINFO_FULLY_MASKED_P)
        (LOOP_VINFO_MASKS, LOOP_VINFO_MASK_COMPARE_TYPE): New macros.
        (vect_max_vf): New function.
        (slpeel_make_loop_iterate_ntimes): Delete.
        (vect_set_loop_condition, vect_get_loop_mask_type, vect_gen_while)
        (vect_halve_mask_nunits, vect_double_mask_nunits): Declare.
        (vect_record_loop_mask, vect_get_loop_mask): Likewise.
        * tree-vect-loop-manip.c: Include tree-ssa-loop-niter.h,
        internal-fn.h, stor-layout.h and optabs-query.h.
        (vect_set_loop_mask): New function.
        (add_preheader_seq): Likewise.
        (add_header_seq): Likewise.
        (interleave_supported_p): Likewise.
        (vect_maybe_permute_loop_masks): Likewise.
        (vect_set_loop_masks_directly): Likewise.
        (vect_set_loop_condition_masked): Likewise.
        (vect_set_loop_condition_unmasked): New function, split out from
        slpeel_make_loop_iterate_ntimes.
        (slpeel_make_loop_iterate_ntimes): Rename to..
        (vect_set_loop_condition): ...this.  Use vect_set_loop_condition_masked
        for fully-masked loops and vect_set_loop_condition_unmasked otherwise.
        (vect_do_peeling): Update call accordingly.
        (vect_gen_vector_loop_niters): Use VF as the step for fully-masked
        loops.
        * tree-vect-loop.c (_loop_vec_info::_loop_vec_info): Initialize
        mask_compare_type, can_fully_mask_p and fully_masked_p.
        (release_vec_loop_masks): New function.
        (_loop_vec_info): Use it to free the loop masks.
        (can_produce_all_loop_masks_p): New function.
        (vect_get_max_nscalars_per_iter): Likewise.
        (vect_verify_full_masking): Likewise.
        (vect_analyze_loop_2): Save LOOP_VINFO_CAN_FULLY_MASK_P around
        retries, and free the mask rgroups before retrying.  Check loop-wide
        reasons for disallowing fully-masked loops.  Make the final decision
        about whether use a fully-masked loop or not.
        (vect_estimate_min_profitable_iters): Do not assume that peeling
        for the number of iterations will be needed for fully-masked loops.
        (vectorizable_reduction): Disable fully-masked loops.
        (vectorizable_live_operation): Likewise.
        (vect_halve_mask_nunits): New function.
        (vect_double_mask_nunits): Likewise.
        (vect_record_loop_mask): Likewise.
        (vect_get_loop_mask): Likewise.
        (vect_transform_loop): Handle the case in which the final loop
        iteration might handle a partial vector.  Call vect_set_loop_condition
        instead of slpeel_make_loop_iterate_ntimes.
        * tree-vect-stmts.c: Include tree-ssa-loop-niter.h and gimple-fold.h.
        (check_load_store_masking): New function.
        (prepare_load_store_mask): Likewise.
        (vectorizable_store): Handle fully-masked loops.
        (vectorizable_load): Likewise.
        (supportable_widening_operation): Use vect_halve_mask_nunits for
        booleans.
        (supportable_narrowing_operation): Likewise vect_double_mask_nunits.
        (vect_gen_while): New function.
        * config/aarch64/aarch64.md (umax<mode>3): New expander.
        (aarch64_uqdec<mode>): New insn.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * optabs.def (reduc_and_scal_optab, reduc_ior_scal_optab)
        (reduc_xor_scal_optab): New optabs.
        * doc/md.texi (reduc_and_scal_@var{m}, reduc_ior_scal_@var{m})
        (reduc_xor_scal_@var{m}): Document.
        * doc/sourcebuild.texi (vect_logical_reduc): Likewise.
        * internal-fn.def (IFN_REDUC_AND, IFN_REDUC_IOR, IFN_REDUC_XOR): New
        internal functions.
        * fold-const-call.c (fold_const_call): Handle them.
        * tree-vect-loop.c (reduction_fn_for_scalar_code): Return the new
        internal functions for BIT_AND_EXPR, BIT_IOR_EXPR and BIT_XOR_EXPR.
        * config/aarch64/aarch64-sve.md (reduc_<bit_reduc>_scal_<mode>):
        (*reduc_<bit_reduc>_scal_<mode>): New patterns.
        * config/aarch64/iterators.md (UNSPEC_ANDV, UNSPEC_ORV)
        (UNSPEC_XORV): New unspecs.
        (optab): Add entries for them.
        (BITWISEV): New int iterator.
        (bit_reduc_op): New int attributes.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/md.texi (vec_shl_insert_@var{m}): New optab.
        * internal-fn.def (VEC_SHL_INSERT): New internal function.
        * optabs.def (vec_shl_insert_optab): New optab.
        * tree-vectorizer.h (can_duplicate_and_interleave_p): Declare.
        (duplicate_and_interleave): Likewise.
        * tree-vect-loop.c: Include internal-fn.h.
        (neutral_op_for_slp_reduction): New function, split out from
        get_initial_defs_for_reduction.
        (get_initial_def_for_reduction): Handle option 2 for variable-length
        vectors by loading the neutral value into a vector and then shifting
        the initial value into element 0.
        (get_initial_defs_for_reduction): Replace the code argument with
        the neutral value calculated by neutral_op_for_slp_reduction.
        Use gimple_build_vector for constant-length vectors.
        Use IFN_VEC_SHL_INSERT for variable-length vectors if all
        but the first group_size elements have a neutral value.
        Use duplicate_and_interleave otherwise.
        (vect_create_epilog_for_reduction): Take a neutral_op parameter.
        Update call to get_initial_defs_for_reduction.  Handle SLP
        reductions for variable-length vectors by creating one vector
        result for each scalar result, with the elements associated
        with other scalar results stubbed out with the neutral value.
        (vectorizable_reduction): Call neutral_op_for_slp_reduction.
        Require IFN_VEC_SHL_INSERT for double reductions on
        variable-length vectors, or SLP reductions that have
        a neutral value.  Require can_duplicate_and_interleave_p
        support for variable-length unchained SLP reductions if there
        is no neutral value, such as for MIN/MAX reductions.  Also require
        the number of vector elements to be a multiple of the number of
        SLP statements when doing variable-length unchained SLP reductions.
        Update call to vect_create_epilog_for_reduction.
        * tree-vect-slp.c (can_duplicate_and_interleave_p): Make public
        and remove initial values.
        (duplicate_and_interleave): Make public.
        * config/aarch64/aarch64.md (UNSPEC_INSR): New unspec.
        * config/aarch64/aarch64-sve.md (vec_shl_insert_<mode>): New insn.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c: Include gimple-fold.h and internal-fn.h
        (can_duplicate_and_interleave_p): New function.
        (vect_get_and_check_slp_defs): Take the vector of statements
        rather than just the current one.  Remove excess parentheses.
        Restriction rejectinon of vect_constant_def and vect_external_def
        for variable-length vectors to boolean types, or types for which
        can_duplicate_and_interleave_p is false.
        (vect_build_slp_tree_2): Update call to vect_get_and_check_slp_defs.
        (duplicate_and_interleave): New function.
        (vect_get_constant_vectors): Use gimple_build_vector for
        constant-length vectors and suitable variable-length constant
        vectors.  Use duplicate_and_interleave for other variable-length
        vectors.  Don't defer the update when inserting new statements.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-loop.c (vect_estimate_min_profitable_iters): Make sure
        min_profitable_iters doesn't go negative.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/md.texi (vec_mask_load_lanes@var{m}@var{n}): Document.
        (vec_mask_store_lanes@var{m}@var{n}): Likewise.
        * optabs.def (vec_mask_load_lanes_optab): New optab.
        (vec_mask_store_lanes_optab): Likewise.
        * internal-fn.def (MASK_LOAD_LANES): New internal function.
        (MASK_STORE_LANES): Likewise.
        * internal-fn.c (mask_load_lanes_direct): New macro.
        (mask_store_lanes_direct): Likewise.
        (expand_mask_load_optab_fn): Handle masked operations.
        (expand_mask_load_lanes_optab_fn): New macro.
        (expand_mask_store_optab_fn): Handle masked operations.
        (expand_mask_store_lanes_optab_fn): New macro.
        (direct_mask_load_lanes_optab_supported_p): Likewise.
        (direct_mask_store_lanes_optab_supported_p): Likewise.
        * tree-vectorizer.h (vect_store_lanes_supported): Take a masked_p
        parameter.
        (vect_load_lanes_supported): Likewise.
        * tree-vect-data-refs.c (strip_conversion): New function.
        (can_group_stmts_p): Likewise.
        (vect_analyze_data_ref_accesses): Use it instead of checking
        for a pair of assignments.
        (vect_store_lanes_supported): Take a masked_p parameter.
        (vect_load_lanes_supported): Likewise.
        * tree-vect-loop.c (vect_analyze_loop_2): Update calls to
        vect_store_lanes_supported and vect_load_lanes_supported.
        * tree-vect-slp.c (vect_analyze_slp_instance): Likewise.
        * tree-vect-stmts.c (get_group_load_store_type): Take a masked_p
        parameter.  Don't allow gaps for masked accesses.
        Use vect_get_store_rhs.  Update calls to vect_store_lanes_supported
        and vect_load_lanes_supported.
        (get_load_store_type): Take a masked_p parameter and update
        call to get_group_load_store_type.
        (vectorizable_store): Update call to get_load_store_type.
        Handle IFN_MASK_STORE_LANES.
        (vectorizable_load): Update call to get_load_store_type.
        Handle IFN_MASK_LOAD_LANES.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/aarch64/aarch64-modes.def: Define x2, x3 and x4 vector
        modes for SVE.
        * config/aarch64/aarch64-protos.h
        (aarch64_sve_struct_memory_operand_p): Declare.
        * config/aarch64/iterators.md (SVE_STRUCT): New mode iterator.
        (vector_count, insn_length, VSINGLE, vsingle): New mode attributes.
        (VPRED, vpred): Handle SVE structure modes.
        * config/aarch64/constraints.md (Utx): New constraint.
        * config/aarch64/predicates.md (aarch64_sve_struct_memory_operand)
        (aarch64_sve_struct_nonimmediate_operand): New predicates.
        * config/aarch64/aarch64.md (UNSPEC_LDN, UNSPEC_STN): New unspecs.
        * config/aarch64/aarch64-sve.md (mov<mode>, *aarch64_sve_mov<mode>_le)
        (*aarch64_sve_mov<mode>_be, pred_mov<mode>): New patterns for
        structure modes.  Split into pieces after RA.
        (vec_load_lanes<mode><vsingle>, vec_mask_load_lanes<mode><vsingle>)
        (vec_store_lanes<mode><vsingle>, vec_mask_store_lanes<mode><vsingle>):
        New patterns.
        * config/aarch64/aarch64.c (aarch64_classify_vector_mode): Handle
        SVE structure modes.
        (aarch64_classify_address): Likewise.
        (sizetochar): Move earlier in file.
        (aarch64_print_operand): Handle SVE register lists.
        (aarch64_array_mode): New function.
        (aarch64_sve_struct_memory_operand_p): Likewise.
        (TARGET_ARRAY_MODE): Redefine.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.def (array_mode): New target hook.
        * doc/tm.texi.in (TARGET_ARRAY_MODE): New hook.
        * doc/tm.texi: Regenerate.
        * hooks.h (hook_optmode_mode_uhwi_none): Declare.
        * hooks.c (hook_optmode_mode_uhwi_none): New function.
        * tree-vect-data-refs.c (vect_lanes_optab_supported_p): Use
        targetm.array_mode.
        * stor-layout.c (mode_for_array): Likewise.  Support polynomial
        type sizes.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * fold-const.c (fold_binary_loc): Check the argument types
        rather than the result type when testing for a vector operation.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>

        * doc/tm.texi.in (DWARF_LAZY_REGISTER_VALUE): Document.
        * doc/tm.texi: Regenerate.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * doc/invoke.texi (-msve-vector-bits=): Document new option.
        (sve): Document new AArch64 extension.
        * doc/md.texi (w): Extend the description of the AArch64
        constraint to include SVE vectors.
        (Upl, Upa): Document new AArch64 predicate constraints.
        * config/aarch64/aarch64-opts.h (aarch64_sve_vector_bits_enum): New
        enum.
        * config/aarch64/aarch64.opt (sve_vector_bits): New enum.
        (msve-vector-bits=): New option.
        * config/aarch64/aarch64-option-extensions.def (fp, simd): Disable
        SVE when these are disabled.
        (sve): New extension.
        * config/aarch64/aarch64-modes.def: Define SVE vector and predicate
        modes.  Adjust their number of units based on aarch64_sve_vg.
        (MAX_BITSIZE_MODE_ANY_MODE): Define.
        * config/aarch64/aarch64-protos.h (ADDR_QUERY_ANY): New
        aarch64_addr_query_type.
        (aarch64_const_vec_all_same_in_range_p, aarch64_sve_pred_mode)
        (aarch64_sve_cnt_immediate_p, aarch64_sve_addvl_addpl_immediate_p)
        (aarch64_sve_inc_dec_immediate_p, aarch64_add_offset_temporaries)
        (aarch64_split_add_offset, aarch64_output_sve_cnt_immediate)
        (aarch64_output_sve_addvl_addpl, aarch64_output_sve_inc_dec_immediate)
        (aarch64_output_sve_mov_immediate, aarch64_output_ptrue): Declare.
        (aarch64_simd_imm_zero_p): Delete.
        (aarch64_check_zero_based_sve_index_immediate): Declare.
        (aarch64_sve_index_immediate_p, aarch64_sve_arith_immediate_p)
        (aarch64_sve_bitmask_immediate_p, aarch64_sve_dup_immediate_p)
        (aarch64_sve_cmp_immediate_p, aarch64_sve_float_arith_immediate_p)
        (aarch64_sve_float_mul_immediate_p): Likewise.
        (aarch64_classify_symbol): Take the offset as a HOST_WIDE_INT
        rather than an rtx.
        (aarch64_sve_ld1r_operand_p, aarch64_sve_ldr_operand_p): Declare.
        (aarch64_expand_mov_immediate): Take a gen_vec_duplicate callback.
        (aarch64_emit_sve_pred_move, aarch64_expand_sve_mem_move): Declare.
        (aarch64_expand_sve_vec_cmp_int, aarch64_expand_sve_vec_cmp_float)
        (aarch64_expand_sve_vcond, aarch64_expand_sve_vec_perm): Declare.
        (aarch64_regmode_natural_size): Likewise.
        * config/aarch64/aarch64.h (AARCH64_FL_SVE): New macro.
        (AARCH64_FL_V8_3, AARCH64_FL_RCPC, AARCH64_FL_DOTPROD): Shift
        left one place.
        (AARCH64_ISA_SVE, TARGET_SVE): New macros.
        (FIXED_REGISTERS, CALL_USED_REGISTERS, REGISTER_NAMES): Add entries
        for VG and the SVE predicate registers.
        (V_ALIASES): Add a "z"-prefixed alias.
        (FIRST_PSEUDO_REGISTER): Change to P15_REGNUM + 1.
        (AARCH64_DWARF_VG, AARCH64_DWARF_P0): New macros.
        (PR_REGNUM_P, PR_LO_REGNUM_P): Likewise.
        (PR_LO_REGS, PR_HI_REGS, PR_REGS): New reg_classes.
        (REG_CLASS_NAMES): Add entries for them.
        (REG_CLASS_CONTENTS): Likewise.  Update ALL_REGS to include VG
        and the predicate registers.
        (aarch64_sve_vg): Declare.
        (BITS_PER_SVE_VECTOR, BYTES_PER_SVE_VECTOR, BYTES_PER_SVE_PRED)
        (SVE_BYTE_MODE, MAX_COMPILE_TIME_VEC_BYTES): New macros.
        (REGMODE_NATURAL_SIZE): Define.
        * config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Handle
        SVE macros.
        * config/aarch64/aarch64.c: Include cfgrtl.h.
        (simd_immediate_info): Add a constructor for series vectors,
        and an associated step field.
        (aarch64_sve_vg): New variable.
        (aarch64_dbx_register_number): Handle VG and the predicate registers.
        (aarch64_vect_struct_mode_p, aarch64_vector_mode_p): Delete.
        (VEC_ADVSIMD, VEC_SVE_DATA, VEC_SVE_PRED, VEC_STRUCT, VEC_ANY_SVE)
        (VEC_ANY_DATA, VEC_STRUCT): New constants.
        (aarch64_advsimd_struct_mode_p, aarch64_sve_pred_mode_p)
        (aarch64_classify_vector_mode, aarch64_vector_data_mode_p)
        (aarch64_sve_data_mode_p, aarch64_sve_pred_mode)
        (aarch64_get_mask_mode): New functions.
        (aarch64_hard_regno_nregs): Handle SVE data modes for FP_REGS
        and FP_LO_REGS.  Handle PR_REGS, PR_LO_REGS and PR_HI_REGS.
        (aarch64_hard_regno_mode_ok): Handle VG.  Also handle the SVE
        predicate modes and predicate registers.  Explicitly restrict
        GPRs to modes of 16 bytes or smaller.  Only allow FP registers
        to store a vector mode if it is recognized by
        aarch64_classify_vector_mode.
        (aarch64_regmode_natural_size): New function.
        (aarch64_hard_regno_caller_save_mode): Return the original mode
        for predicates.
        (aarch64_sve_cnt_immediate_p, aarch64_output_sve_cnt_immediate)
        (aarch64_sve_addvl_addpl_immediate_p, aarch64_output_sve_addvl_addpl)
        (aarch64_sve_inc_dec_immediate_p, aarch64_output_sve_inc_dec_immediate)
        (aarch64_add_offset_1_temporaries, aarch64_offset_temporaries): New
        functions.
        (aarch64_add_offset): Add a temp2 parameter.  Assert that temp1
        does not overlap dest if the function is frame-related.  Handle
        SVE constants.
        (aarch64_split_add_offset): New function.
        (aarch64_add_sp, aarch64_sub_sp): Add temp2 parameters and pass
        them aarch64_add_offset.
        (aarch64_allocate_and_probe_stack_space): Add a temp2 parameter
        and update call to aarch64_sub_sp.
        (aarch64_add_cfa_expression): New function.
        (aarch64_expand_prologue): Pass extra temporary registers to the
        functions above.  Handle the case in which we need to emit new
        DW_CFA_expressions for registers that were originally saved
        relative to the stack pointer, but now have to be expressed
        relative to the frame pointer.
        (aarch64_output_mi_thunk): Pass extra temporary registers to the
        functions above.
        (aarch64_expand_epilogue): Likewise.  Prevent inheritance of
        IP0 and IP1 values for SVE frames.
        (aarch64_expand_vec_series): New function.
        (aarch64_expand_sve_widened_duplicate): Likewise.
        (aarch64_expand_sve_const_vector): Likewise.
        (aarch64_expand_mov_immediate): Add a gen_vec_duplicate parameter.
        Handle SVE constants.  Use emit_move_insn to move a force_const_mem
        into the register, rather than emitting a SET directly.
        (aarch64_emit_sve_pred_move, aarch64_expand_sve_mem_move)
        (aarch64_get_reg_raw_mode, offset_4bit_signed_scaled_p)
        (offset_6bit_unsigned_scaled_p, aarch64_offset_7bit_signed_scaled_p)
        (offset_9bit_signed_scaled_p): New functions.
        (aarch64_replicate_bitmask_imm): New function.
        (aarch64_bitmask_imm): Use it.
        (aarch64_cannot_force_const_mem): Reject expressions involving
        a CONST_POLY_INT.  Update call to aarch64_classify_symbol.
        (aarch64_classify_index): Handle SVE indices, by requiring
        a plain register index with a scale that matches the element size.
        (aarch64_classify_address): Handle SVE addresses.  Assert that
        the mode of the address is VOIDmode or an integer mode.
        Update call to aarch64_classify_symbol.
        (aarch64_classify_symbolic_expression): Update call to
        aarch64_classify_symbol.
        (aarch64_const_vec_all_in_range_p): New function.
        (aarch64_print_vector_float_operand): Likewise.
        (aarch64_print_operand): Handle 'N' and 'C'.  Use "zN" rather than
        "vN" for FP registers with SVE modes.  Handle (const ...) vectors
        and the FP immediates 1.0 and 0.5.
        (aarch64_print_address_internal): Handle SVE addresses.
        (aarch64_print_operand_address): Use ADDR_QUERY_ANY.
        (aarch64_regno_regclass): Handle predicate registers.
        (aarch64_secondary_reload): Handle big-endian reloads of SVE
        data modes.
        (aarch64_class_max_nregs): Handle SVE modes and predicate registers.
        (aarch64_rtx_costs): Check for ADDVL and ADDPL instructions.
        (aarch64_convert_sve_vector_bits): New function.
        (aarch64_override_options): Use it to handle -msve-vector-bits=.
        (aarch64_classify_symbol): Take the offset as a HOST_WIDE_INT
        rather than an rtx.
        (aarch64_legitimate_constant_p): Use aarch64_classify_vector_mode.
        Handle SVE vector and predicate modes.  Accept VL-based constants
        that need only one temporary register, and VL offsets that require
        no temporary registers.
        (aarch64_conditional_register_usage): Mark the predicate registers
        as fixed if SVE isn't available.
        (aarch64_vector_mode_supported_p): Use aarch64_classify_vector_mode.
        Return true for SVE vector and predicate modes.
        (aarch64_simd_container_mode): Take the number of bits as a poly_int64
        rather than an unsigned int.  Handle SVE modes.
        (aarch64_preferred_simd_mode): Update call accordingly.  Handle
        SVE modes.
        (aarch64_autovectorize_vector_sizes): Add BYTES_PER_SVE_VECTOR
        if SVE is enabled.
        (aarch64_sve_index_immediate_p, aarch64_sve_arith_immediate_p)
        (aarch64_sve_bitmask_immediate_p, aarch64_sve_dup_immediate_p)
        (aarch64_sve_cmp_immediate_p, aarch64_sve_float_arith_immediate_p)
        (aarch64_sve_float_mul_immediate_p): New functions.
        (aarch64_sve_valid_immediate): New function.
        (aarch64_simd_valid_immediate): Use it as the fallback for SVE vectors.
        Explicitly reject structure modes.  Check for INDEX constants.
        Handle PTRUE and PFALSE constants.
        (aarch64_check_zero_based_sve_index_immediate): New function.
        (aarch64_simd_imm_zero_p): Delete.
        (aarch64_mov_operand_p): Use aarch64_simd_valid_immediate for
        vector modes.  Accept constants in the range of CNT[BHWD].
        (aarch64_simd_scalar_immediate_valid_for_move): Explicitly
        ask for an Advanced SIMD mode.
        (aarch64_sve_ld1r_operand_p, aarch64_sve_ldr_operand_p): New functions.
        (aarch64_simd_vector_alignment): Handle SVE predicates.
        (aarch64_vectorize_preferred_vector_alignment): New function.
        (aarch64_simd_vector_alignment_reachable): Use it instead of
        the vector size.
        (aarch64_shift_truncation_mask): Use aarch64_vector_data_mode_p.
        (aarch64_output_sve_mov_immediate, aarch64_output_ptrue): New
        functions.
        (MAX_VECT_LEN): Delete.
        (expand_vec_perm_d): Add a vec_flags field.
        (emit_unspec2, aarch64_expand_sve_vec_perm): New functions.
        (aarch64_evpc_trn, aarch64_evpc_uzp, aarch64_evpc_zip)
        (aarch64_evpc_ext): Don't apply a big-endian lane correction
        for SVE modes.
        (aarch64_evpc_rev): Rename to...
        (aarch64_evpc_rev_local): ...this.  Use a predicated operation for SVE.
        (aarch64_evpc_rev_global): New function.
        (aarch64_evpc_dup): Enforce a 64-byte range for SVE DUP.
        (aarch64_evpc_tbl): Use MAX_COMPILE_TIME_VEC_BYTES instead of
        MAX_VECT_LEN.
        (aarch64_evpc_sve_tbl): New function.
        (aarch64_expand_vec_perm_const_1): Update after rename of
        aarch64_evpc_rev.  Handle SVE permutes too, trying
        aarch64_evpc_rev_global and using aarch64_evpc_sve_tbl rather
        than aarch64_evpc_tbl.
        (aarch64_vectorize_vec_perm_const): Initialize vec_flags.
        (aarch64_sve_cmp_operand_p, aarch64_unspec_cond_code)
        (aarch64_gen_unspec_cond, aarch64_expand_sve_vec_cmp_int)
        (aarch64_emit_unspec_cond, aarch64_emit_unspec_cond_or)
        (aarch64_emit_inverted_unspec_cond, aarch64_expand_sve_vec_cmp_float)
        (aarch64_expand_sve_vcond): New functions.
        (aarch64_modes_tieable_p): Use aarch64_vector_data_mode_p instead
        of aarch64_vector_mode_p.
        (aarch64_dwarf_poly_indeterminate_value): New function.
        (aarch64_compute_pressure_classes): Likewise.
        (aarch64_can_change_mode_class): Likewise.
        (TARGET_GET_RAW_RESULT_MODE, TARGET_GET_RAW_ARG_MODE): Redefine.
        (TARGET_VECTORIZE_PREFERRED_VECTOR_ALIGNMENT): Likewise.
        (TARGET_VECTORIZE_GET_MASK_MODE): Likewise.
        (TARGET_DWARF_POLY_INDETERMINATE_VALUE): Likewise.
        (TARGET_COMPUTE_PRESSURE_CLASSES): Likewise.
        (TARGET_CAN_CHANGE_MODE_CLASS): Likewise.
        * config/aarch64/constraints.md (Upa, Upl, Uav, Uat, Usv, Usi, Utr)
        (Uty, Dm, vsa, vsc, vsd, vsi, vsn, vsl, vsm, vsA, vsM, vsN): New
        constraints.
        (Dn, Dl, Dr): Accept const as well as const_vector.
        (Dz): Likewise.  Compare against CONST0_RTX.
        * config/aarch64/iterators.md: Refer to "Advanced SIMD" instead
        of "vector" where appropriate.
        (SVE_ALL, SVE_BH, SVE_BHS, SVE_BHSI, SVE_HSDI, SVE_HSF, SVE_SD)
        (SVE_SDI, SVE_I, SVE_F, PRED_ALL, PRED_BHS): New mode iterators.
        (UNSPEC_SEL, UNSPEC_ANDF, UNSPEC_IORF, UNSPEC_XORF, UNSPEC_COND_LT)
        (UNSPEC_COND_LE, UNSPEC_COND_EQ, UNSPEC_COND_NE, UNSPEC_COND_GE)
        (UNSPEC_COND_GT, UNSPEC_COND_LO, UNSPEC_COND_LS, UNSPEC_COND_HS)
        (UNSPEC_COND_HI, UNSPEC_COND_UO): New unspecs.
        (Vetype, VEL, Vel, VWIDE, Vwide, vw, vwcore, V_INT_EQUIV)
        (v_int_equiv): Extend to SVE modes.
        (Vesize, V128, v128, Vewtype, V_FP_EQUIV, v_fp_equiv, VPRED): New
        mode attributes.
        (LOGICAL_OR, SVE_INT_UNARY, SVE_FP_UNARY): New code iterators.
        (optab): Handle popcount, smin, smax, umin, umax, abs and sqrt.
        (logical_nn, lr, sve_int_op, sve_fp_op): New code attributs.
        (LOGICALF, OPTAB_PERMUTE, UNPACK, UNPACK_UNSIGNED, SVE_COND_INT_CMP)
        (SVE_COND_FP_CMP): New int iterators.
        (perm_hilo): Handle the new unpack unspecs.
        (optab, logicalf_op, su, perm_optab, cmp_op, imm_con): New int
        attributes.
        * config/aarch64/predicates.md (aarch64_sve_cnt_immediate)
        (aarch64_sve_addvl_addpl_immediate, aarch64_split_add_offset_immediate)
        (aarch64_pluslong_or_poly_operand, aarch64_nonmemory_operand)
        (aarch64_equality_operator, aarch64_constant_vector_operand)
        (aarch64_sve_ld1r_operand, aarch64_sve_ldr_operand): New predicates.
        (aarch64_sve_nonimmediate_operand): Likewise.
        (aarch64_sve_general_operand): Likewise.
        (aarch64_sve_dup_operand, aarch64_sve_arith_immediate): Likewise.
        (aarch64_sve_sub_arith_immediate, aarch64_sve_inc_dec_immediate)
        (aarch64_sve_logical_immediate, aarch64_sve_mul_immediate): Likewise.
        (aarch64_sve_dup_immediate, aarch64_sve_cmp_vsc_immediate): Likewise.
        (aarch64_sve_cmp_vsd_immediate, aarch64_sve_index_immediate): Likewise.
        (aarch64_sve_float_arith_immediate): Likewise.
        (aarch64_sve_float_arith_with_sub_immediate): Likewise.
        (aarch64_sve_float_mul_immediate, aarch64_sve_arith_operand): Likewise.
        (aarch64_sve_add_operand, aarch64_sve_logical_operand): Likewise.
        (aarch64_sve_lshift_operand, aarch64_sve_rshift_operand): Likewise.
        (aarch64_sve_mul_operand, aarch64_sve_cmp_vsc_operand): Likewise.
        (aarch64_sve_cmp_vsd_operand, aarch64_sve_index_operand): Likewise.
        (aarch64_sve_float_arith_operand): Likewise.
        (aarch64_sve_float_arith_with_sub_operand): Likewise.
        (aarch64_sve_float_mul_operand): Likewise.
        (aarch64_sve_vec_perm_operand): Likewise.
        (aarch64_pluslong_operand): Include aarch64_sve_addvl_addpl_immediate.
        (aarch64_mov_operand): Accept const_poly_int and const_vector.
        (aarch64_simd_lshift_imm, aarch64_simd_rshift_imm): Accept const
        as well as const_vector.
        (aarch64_simd_imm_zero, aarch64_simd_imm_minus_one): Move earlier
        in file.  Use CONST0_RTX and CONSTM1_RTX.
        (aarch64_simd_or_scalar_imm_zero): Likewise.  Add match_codes.
        (aarch64_simd_reg_or_zero): Accept const as well as const_vector.
        Use aarch64_simd_imm_zero.
        * config/aarch64/aarch64-sve.md: New file.
        * config/aarch64/aarch64.md: Include it.
        (VG_REGNUM, P0_REGNUM, P7_REGNUM, P15_REGNUM): New register numbers.
        (UNSPEC_REV, UNSPEC_LD1_SVE, UNSPEC_ST1_SVE, UNSPEC_MERGE_PTRUE)
        (UNSPEC_PTEST_PTRUE, UNSPEC_UNPACKSHI, UNSPEC_UNPACKUHI)
        (UNSPEC_UNPACKSLO, UNSPEC_UNPACKULO, UNSPEC_PACK)
        (UNSPEC_FLOAT_CONVERT, UNSPEC_WHILE_LO): New unspec constants.
        (sve): New attribute.
        (enabled): Disable instructions with the sve attribute unless
        TARGET_SVE.
        (movqi, movhi): Pass CONST_POLY_INT operaneds through
        aarch64_expand_mov_immediate.
        (*mov<mode>_aarch64, *movsi_aarch64, *movdi_aarch64): Handle
        CNT[BHSD] immediates.
        (movti): Split CONST_POLY_INT moves into two halves.
        (add<mode>3): Accept aarch64_pluslong_or_poly_operand.
        Split additions that need a temporary here if the destination
        is the stack pointer.
        (*add<mode>3_aarch64): Handle ADDVL and ADDPL immediates.
        (*add<mode>3_poly_1): New instruction.
        (set_clobber_cc): New expander.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>

        * simplify-rtx.c (simplify_immed_subreg): Add an inner_bytes
        parameter and use it instead of GET_MODE_SIZE (innermode).  Use
        inner_bytes * BITS_PER_UNIT instead of GET_MODE_BITSIZE (innermode).
        Use CEIL (inner_bytes, GET_MODE_UNIT_SIZE (innermode)) instead of
        GET_MODE_NUNITS (innermode).  Also add a first_elem parameter.
        Change innermode from fixed_mode_size to machine_mode.
        (simplify_subreg): Update call accordingly.  Handle a constant-sized
        subreg of a variable-length CONST_VECTOR.

2018-01-13  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-ssa-address.c (mem_ref_valid_without_offset_p): New function.
        (add_offset_to_base): New function, split out from...
        (create_mem_ref): ...here.  When handling a scale other than 1,
        check first whether the address is valid without the offset.
        Add it into the base if so, leaving the index and scale as-is.

2018-01-12  Jakub Jelinek  <jakub@redhat.com>

        PR c++/83778
        * config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin): Call
        fold_for_warn before checking if arg2 is INTEGER_CST.

2018-01-12  Segher Boessenkool  <segher@kernel.crashing.org>

        * config/rs6000/predicates.md (load_multiple_operation): Delete.
        (store_multiple_operation): Delete.
        * config/rs6000/rs6000-cpus.def (601): Remove MASK_STRING.
        * config/rs6000/rs6000-protos.h (rs6000_output_load_multiple): Delete.
        * config/rs6000/rs6000-string.c (expand_block_move): Delete everything
        guarded by TARGET_STRING.
        (rs6000_output_load_multiple): Delete.
        * config/rs6000/rs6000.c (rs6000_option_override_internal): Delete
        OPTION_MASK_STRING / TARGET_STRING handling.
        (print_operand) <'N', 'O'>: Add comment that these are unused now.
        (const rs6000_opt_masks) <"string">: Change mask to 0.
        * config/rs6000/rs6000.h (TARGET_DEFAULT): Remove MASK_STRING.
        (MASK_STRING): Delete.
        * config/rs6000/rs6000.md (*mov<mode>_string): Delete TARGET_STRING
        parts.  Simplify.
        (load_multiple): Delete.
        (*ldmsi8): Delete.
        (*ldmsi7): Delete.
        (*ldmsi6): Delete.
        (*ldmsi5): Delete.
        (*ldmsi4): Delete.
        (*ldmsi3): Delete.
        (store_multiple): Delete.
        (*stmsi8): Delete.
        (*stmsi7): Delete.
        (*stmsi6): Delete.
        (*stmsi5): Delete.
        (*stmsi4): Delete.
        (*stmsi3): Delete.
        (movmemsi_8reg): Delete.
        (corresponding unnamed define_insn): Delete.
        (movmemsi_6reg): Delete.
        (corresponding unnamed define_insn): Delete.
        (movmemsi_4reg): Delete.
        (corresponding unnamed define_insn): Delete.
        (movmemsi_2reg): Delete.
        (corresponding unnamed define_insn): Delete.
        (movmemsi_1reg): Delete.
        (corresponding unnamed define_insn): Delete.
        * config/rs6000/rs6000.opt (mno-string): New.
        (mstring): Replace by deprecation warning stub.
        * doc/invoke.texi (RS/6000 and PowerPC Options): Delete -mstring.

2018-01-12  Jakub Jelinek  <jakub@redhat.com>

        * regrename.c (regrename_do_replace): If replacing the same
        reg multiple times, try to reuse last created gen_raw_REG.

        PR debug/81155
        * bb-reorder.c (pass_partition_blocks::gate): In lto don't partition
        main to workaround a bug in GDB.

2018-01-12  Tom de Vries  <tom@codesourcery.com>

        PR target/83737
        * config.gcc (nvptx*-*-*): Set use_gcc_stdint=wrap.

2018-01-12  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/80481
        * ira-color.c (get_cap_member): New function.
        (allocnos_conflict_by_live_ranges_p): Use it.
        (slot_coalesced_allocno_live_ranges_intersect_p): Add assert.
        (setup_slot_coalesced_allocno_live_ranges): Ditto.

2018-01-12  Uros Bizjak  <ubizjak@gmail.com>

        PR target/83628
        * config/alpha/alpha.md (*saddsi_1): New insn_ans_split pattern.
        (*saddl_se_1): Ditto.
        (*ssubsi_1): Ditto.
        (*ssubl_se_1): Ditto.

2018-01-12  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-predcom.c (aff_combination_dr_offset): Use wi::to_poly_widest
        rather than wi::to_widest for DR_INITs.
        * tree-vect-data-refs.c (vect_find_same_alignment_drs): Use
        wi::to_poly_offset rather than wi::to_offset for DR_INIT.
        (vect_analyze_data_ref_accesses): Require both DR_INITs to be
        INTEGER_CSTs.
        (vect_analyze_group_access_1): Note that here.

2018-01-12  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vectorizer.c (get_vec_alignment_for_array_type): Handle
        polynomial type sizes.

2018-01-12  Richard Sandiford  <richard.sandiford@linaro.org>

        * gimplify.c (gimple_add_tmp_var_fn): Allow variables to have a
        poly_uint64 size, rather than requiring an unsigned HOST_WIDE_INT size.
        (gimple_add_tmp_var): Likewise.

2018-01-12  Martin Liska  <mliska@suse.cz>

        * gimple.c (gimple_alloc_counts): Use uint64_t instead of int.
        (gimple_alloc_sizes): Likewise.
        (dump_gimple_statistics): Use PRIu64 in printf format.
        * gimple.h: Change uint64_t to int.

2018-01-12  Martin Liska  <mliska@suse.cz>

        * tree-core.h: Use uint64_t instead of int.
        * tree.c (tree_node_counts): Likewise.
        (tree_node_sizes): Likewise.
        (dump_tree_statistics): Use PRIu64 in printf format.

2018-01-12  Martin Liska  <mliska@suse.cz>

        * Makefile.in: As qsort_chk is implemented in vec.c, add
        vec.o to linkage of gencfn-macros.
        * tree.c (build_new_poly_int_cst): Add CXX_MEM_STAT_INFO as it's
        passing the info to record_node_allocation_statistics.
        (test_vector_cst_patterns): Add CXX_MEM_STAT_INFO to declaration
        and pass the info.
        * ggc-common.c (struct ggc_usage): Add operator== and use
        it in operator< and compare function.
        * mem-stats.h (struct mem_usage): Likewise.
        * vec.c (struct vec_usage): Remove operator< and compare
        function. Can be simply inherited.

2018-01-12  Martin Jambor  <mjambor@suse.cz>

        PR target/81616
        * params.def: New parameter PARAM_AVOID_FMA_MAX_BITS.
        * tree-ssa-math-opts.c: Include domwalk.h.
        (convert_mult_to_fma_1): New function.
        (fma_transformation_info): New type.
        (fma_deferring_state): Likewise.
        (cancel_fma_deferring): New function.
        (result_of_phi): Likewise.
        (last_fma_candidate_feeds_initial_phi): Likewise.
        (convert_mult_to_fma): Added deferring logic, split actual
        transformation to convert_mult_to_fma_1.
        (math_opts_dom_walker): New type.
        (math_opts_dom_walker::after_dom_children): New method, body moved
        here from pass_optimize_widening_mul::execute, added deferring logic
        bits.
        (pass_optimize_widening_mul::execute): Moved most of code to
        math_opts_dom_walker::after_dom_children.
        * config/i386/x86-tune.def (X86_TUNE_AVOID_128FMA_CHAINS): New.
        * config/i386/i386.c (ix86_option_override_internal): Added
        maybe_setting of PARAM_AVOID_FMA_MAX_BITS.

2018-01-12  Richard Biener  <rguenther@suse.de>

        PR debug/83157
        * dwarf2out.c (gen_variable_die): Do not reset old_die for
        inline instance vars.

2018-01-12  Oleg Endo  <olegendo@gcc.gnu.org>

        PR target/81819
        * config/rx/rx.c (rx_is_restricted_memory_address):
        Handle SUBREG case.

2018-01-12  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/80846
        * target.def (split_reduction): New target hook.
        * targhooks.c (default_split_reduction): New function.
        * targhooks.h (default_split_reduction): Declare.
        * tree-vect-loop.c (vect_create_epilog_for_reduction): If the
        target requests first reduce vectors by combining low and high
        parts.
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Adjust.
        (get_vectype_for_scalar_type_and_size): Export.
        * tree-vectorizer.h (get_vectype_for_scalar_type_and_size): Declare.
        * doc/tm.texi.in (TARGET_VECTORIZE_SPLIT_REDUCTION): Document.
        * doc/tm.texi: Regenerate.
        * config/i386/i386.c (ix86_split_reduction): Implement
        TARGET_VECTORIZE_SPLIT_REDUCTION.

2018-01-12  Eric Botcazou  <ebotcazou@adacore.com>

        PR target/83368
        * config/sparc/sparc.h (PIC_OFFSET_TABLE_REGNUM): Set to INVALID_REGNUM
        in PIC mode except for TARGET_VXWORKS_RTP.
        * config/sparc/sparc.c: Include cfgrtl.h.
        (TARGET_INIT_PIC_REG): Define.
        (TARGET_USE_PSEUDO_PIC_REG): Likewise.
        (sparc_pic_register_p): New predicate.
        (sparc_legitimate_address_p): Use it.
        (sparc_legitimize_pic_address): Likewise.
        (sparc_delegitimize_address): Likewise.
        (sparc_mode_dependent_address_p): Likewise.
        (gen_load_pcrel_sym): Remove 4th parameter.
        (load_got_register): Adjust call to above.  Remove obsolete stuff.
        (sparc_expand_prologue): Do not call load_got_register here.
        (sparc_flat_expand_prologue): Likewise.
        (sparc_output_mi_thunk): Set the pic_offset_table_rtx object.
        (sparc_use_pseudo_pic_reg): New function.
        (sparc_init_pic_reg): Likewise.
        * config/sparc/sparc.md (vxworks_load_got): Set the GOT register.
        (builtin_setjmp_receiver): Enable only for TARGET_VXWORKS_RTP.

2018-01-12  Christophe Lyon  <christophe.lyon@linaro.org>

        * doc/sourcebuild.texi (Effective-Target Keywords, Other attributes):
        Add item for branch_cost.

2018-01-12  Eric Botcazou  <ebotcazou@adacore.com>

        PR rtl-optimization/83565
        * rtlanal.c (nonzero_bits1): On WORD_REGISTER_OPERATIONS machines, do
        not extend the result to a larger mode for rotate operations.
        (num_sign_bit_copies1): Likewise.

2018-01-12  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

        PR target/40411
        * config/sol2.h (STARTFILE_ARCH_SPEC): Don't use with -shared or
        -symbolic.
        Use values-Xc.o for -pedantic.
        Link with values-xpg4.o for C90, values-xpg6.o otherwise.

2018-01-12  Martin Liska  <mliska@suse.cz>

        PR ipa/83054
        * ipa-devirt.c (final_warning_record::grow_type_warnings):
        New function.
        (possible_polymorphic_call_targets): Use it.
        (ipa_devirt): Likewise.

2018-01-12  Martin Liska  <mliska@suse.cz>

        * profile-count.h (enum profile_quality): Use 0 as invalid
        enum value of profile_quality.

2018-01-12  Chung-Ju Wu  <jasonwucj@gmail.com>

        * doc/invoke.texi (NDS32 Options): Add -mext-perf, -mext-perf2 and
        -mext-string options.

2018-01-12  Richard Biener  <rguenther@suse.de>

        * lto-streamer-out.c (DFS::DFS_write_tree_body): Process
        DECL_DEBUG_EXPR conditional on DECL_HAS_DEBUG_EXPR_P.
        * tree-streamer-in.c (lto_input_ts_decl_common_tree_pointers):
        Likewise.
        * tree-streamer-out.c (write_ts_decl_common_tree_pointers): Likewise.

2018-01-11  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * configure.ac (--with-long-double-format): Add support for the
        configuration option to change the default long double format on
        PowerPC systems.
        * config.gcc (powerpc*-linux*-*): Likewise.
        * configure: Regenerate.
        * config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): If long
        double is IEEE, define __KC__ and __KF__ to allow floatn.h to be
        used without modification.

2018-01-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        * config/rs6000/rs6000-builtin.def (BU_P7_MISC_X): New #define.
        (SPEC_BARRIER): New instantiation of BU_P7_MISC_X.
        * config/rs6000/rs6000.c (rs6000_expand_builtin): Handle
        MISC_BUILTIN_SPEC_BARRIER.
        (rs6000_init_builtins): Likewise.
        * config/rs6000/rs6000.md (UNSPECV_SPEC_BARRIER): New UNSPECV
        enum value.
        (speculation_barrier): New define_insn.
        * doc/extend.texi: Document __builtin_speculation_barrier.

2018-01-11  Jakub Jelinek  <jakub@redhat.com>

        PR target/83203
        * config/i386/i386.c (ix86_expand_vector_init_one_nonzero): If one_var
        is 0, for V{8,16}S[IF] and V[48]D[IF]mode use gen_vec_set<mode>_0.
        * config/i386/sse.md (VI8_AVX_AVX512F, VI4F_256_512): New mode
        iterators.
        (ssescalarmodesuffix): Add 512-bit vectors.  Use "d" or "q" for
        integral modes instead of "ss" and "sd".
        (vec_set<mode>_0): New define_insns for 256-bit and 512-bit
        vectors with 32-bit and 64-bit elements.
        (vecdupssescalarmodesuffix): New mode attribute.
        (vec_dup<mode>): Use it.

2018-01-11  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/83330
        * config/i386/i386.c (ix86_compute_frame_layout): Align stack
        frame if argument is passed on stack.

2018-01-11  Jakub Jelinek  <jakub@redhat.com>

        PR target/82682
        * ree.c (combine_reaching_defs): Optimize also
        reg2=exp; reg1=reg2; reg2=any_extend(reg1); into
        reg2=any_extend(exp); reg1=reg2;, formatting fix.

2018-01-11  Jan Hubicka  <hubicka@ucw.cz>

        PR middle-end/83189
        * gimple-ssa-isolate-paths.c (isolate_path): Fix profile update.

2018-01-11  Jan Hubicka  <hubicka@ucw.cz>

        PR middle-end/83718
        * tree-inline.c (copy_cfg_body): Adjust num&den for scaling
        after they are computed.

2018-01-11  Bin Cheng  <bin.cheng@arm.com>

        PR tree-optimization/83695
        * gimple-loop-linterchange.cc
        (tree_loop_interchange::interchange_loops): Call scev_reset_htab to
        reset cached scev information after interchange.
        (pass_linterchange::execute): Remove call to scev_reset_htab.

2018-01-11  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        * config/arm/arm_neon.h (vfmlal_lane_low_u32, vfmlal_lane_high_u32,
        vfmlalq_laneq_low_u32, vfmlalq_lane_low_u32, vfmlal_laneq_low_u32,
        vfmlalq_laneq_high_u32, vfmlalq_lane_high_u32, vfmlal_laneq_high_u32,
        vfmlsl_lane_low_u32, vfmlsl_lane_high_u32, vfmlslq_laneq_low_u32,
        vfmlslq_lane_low_u32, vfmlsl_laneq_low_u32, vfmlslq_laneq_high_u32,
        vfmlslq_lane_high_u32, vfmlsl_laneq_high_u32): Define.
        * config/arm/arm_neon_builtins.def (vfmal_lane_low,
        vfmal_lane_lowv4hf, vfmal_lane_lowv8hf, vfmal_lane_high,
        vfmal_lane_highv4hf, vfmal_lane_highv8hf, vfmsl_lane_low,
        vfmsl_lane_lowv4hf, vfmsl_lane_lowv8hf, vfmsl_lane_high,
        vfmsl_lane_highv4hf, vfmsl_lane_highv8hf): New sets of builtins.
        * config/arm/iterators.md (VFMLSEL2, vfmlsel2): New mode attributes.
        (V_lane_reg): Likewise.
        * config/arm/neon.md (neon_vfm<vfml_op>l_lane_<vfml_half><VCVTF:mode>):
        New define_expand.
        (neon_vfm<vfml_op>l_lane_<vfml_half><vfmlsel2><mode>): Likewise.
        (vfmal_lane_low<mode>_intrinsic,
        vfmal_lane_low<vfmlsel2><mode>_intrinsic,
        vfmal_lane_high<vfmlsel2><mode>_intrinsic,
        vfmal_lane_high<mode>_intrinsic, vfmsl_lane_low<mode>_intrinsic,
        vfmsl_lane_low<vfmlsel2><mode>_intrinsic,
        vfmsl_lane_high<vfmlsel2><mode>_intrinsic,
        vfmsl_lane_high<mode>_intrinsic): New define_insns.

2018-01-11  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        * config/arm/arm-cpus.in (fp16fml): New feature.
        (ALL_SIMD): Add fp16fml.
        (armv8.2-a): Add fp16fml as an option.
        (armv8.3-a): Likewise.
        (armv8.4-a): Add fp16fml as part of fp16.
        * config/arm/arm.h (TARGET_FP16FML): Define.
        * config/arm/arm-c.c (arm_cpu_builtins): Define __ARM_FEATURE_FP16_FML
        when appropriate.
        * config/arm/arm-modes.def (V2HF): Define.
        * config/arm/arm_neon.h (vfmlal_low_u32, vfmlsl_low_u32,
        vfmlal_high_u32, vfmlsl_high_u32, vfmlalq_low_u32,
        vfmlslq_low_u32, vfmlalq_high_u32, vfmlslq_high_u32): Define.
        * config/arm/arm_neon_builtins.def (vfmal_low, vfmal_high,
        vfmsl_low, vfmsl_high): New set of builtins.
        * config/arm/iterators.md (PLUSMINUS): New code iterator.
        (vfml_op): New code attribute.
        (VFMLHALVES): New int iterator.
        (VFML, VFMLSEL): New mode attributes.
        (V_reg): Define mapping for V2HF.
        (V_hi, V_lo): New mode attributes.
        (VF_constraint): Likewise.
        (vfml_half, vfml_half_selector): New int attributes.
        * config/arm/neon.md (neon_vfm<vfml_op>l_<vfml_half><mode>): New
        define_expand.
        (vfmal_low<mode>_intrinsic, vfmsl_high<mode>_intrinsic,
        vfmal_high<mode>_intrinsic, vfmsl_low<mode>_intrinsic):
        New define_insn.
        * config/arm/t-arm-elf (v8_fps): Add fp16fml.
        * config/arm/t-multilib (v8_2_a_simd_variants): Add fp16fml.
        * config/arm/unspecs.md (UNSPEC_VFML_LO, UNSPEC_VFML_HI): New unspecs.
        * doc/invoke.texi (ARM Options): Document fp16fml.  Update armv8.4-a
        documentation.
        * doc/sourcebuild.texi (arm_fp16fml_neon_ok, arm_fp16fml_neon):
        Document new effective target and option set.

2017-01-11  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        * config/arm/arm-cpus.in (armv8_4): New feature.
        (ARMv8_4a): New fgroup.
        (armv8.4-a): New arch.
        * config/arm/arm-tables.opt: Regenerate.
        * config/arm/t-aprofile: Add matching rules for -march=armv8.4-a.
        * config/arm/t-arm-elf (all_v8_archs): Add armv8.4-a.
        * config/arm/t-multilib (v8_4_a_simd_variants): New variable.
        Add matching rules for -march=armv8.4-a and extensions.
        * doc/invoke.texi (ARM Options): Document -march=armv8.4-a.

2018-01-11  Oleg Endo  <olegendo@gcc.gnu.org>

        PR target/81821
        * config/rx/rx.md (BW): New mode attribute.
        (sync_lock_test_and_setsi): Add mode suffix to insn output.

2018-01-11  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83435
        * graphite.c (canonicalize_loop_form): Ignore fake loop exit edges.
        * graphite-scop-detection.c (scop_detection::get_sese): Likewise.
        * tree-vrp.c (add_assert_info): Drop TREE_OVERFLOW if they appear.

2018-01-11  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/aarch64/aarch64.c (aarch64_address_info): Add a const_offset
        field.
        (aarch64_classify_address): Initialize it.  Track polynomial offsets.
        (aarch64_print_address_internal): Use it to check for a zero offset.

2018-01-11  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/aarch64/aarch64-modes.def (NUM_POLY_INT_COEFFS): Set to 2.
        * config/aarch64/aarch64-protos.h (aarch64_initial_elimination_offset):
        Return a poly_int64 rather than a HOST_WIDE_INT.
        (aarch64_offset_7bit_signed_scaled_p): Take the offset as a poly_int64
        rather than a HOST_WIDE_INT.
        * config/aarch64/aarch64.h (aarch64_frame): Protect with
        HAVE_POLY_INT_H rather than HOST_WIDE_INT.  Change locals_offset,
        hard_fp_offset, frame_size, initial_adjust, callee_offset and
        final_offset from HOST_WIDE_INT to poly_int64.
        * config/aarch64/aarch64-builtins.c (aarch64_simd_expand_args): Use
        to_constant when getting the number of units in an Advanced SIMD
        mode.
        (aarch64_builtin_vectorized_function): Check for a constant number
        of units.
        * config/aarch64/aarch64-simd.md (mov<mode>): Handle polynomial
        GET_MODE_SIZE.
        (aarch64_ld<VSTRUCT:nregs>_lane<VALLDIF:mode>): Use the nunits
        attribute instead of GET_MODE_NUNITS.
        * config/aarch64/aarch64.c (aarch64_hard_regno_nregs)
        (aarch64_class_max_nregs): Use the constant_lowest_bound of the
        GET_MODE_SIZE for fixed-size registers.
        (aarch64_const_vec_all_same_in_range_p): Use const_vec_duplicate_p.
        (aarch64_hard_regno_call_part_clobbered, aarch64_classify_index)
        (aarch64_mode_valid_for_sched_fusion_p, aarch64_classify_address)
        (aarch64_legitimize_address_displacement, aarch64_secondary_reload)
        (aarch64_print_operand, aarch64_print_address_internal)
        (aarch64_address_cost, aarch64_rtx_costs, aarch64_register_move_cost)
        (aarch64_short_vector_p, aapcs_vfp_sub_candidate)
        (aarch64_simd_attr_length_rglist, aarch64_operands_ok_for_ldpstp):
        Handle polynomial GET_MODE_SIZE.
        (aarch64_hard_regno_caller_save_mode): Likewise.  Return modes
        wider than SImode without modification.
        (tls_symbolic_operand_type): Use strip_offset instead of split_const.
        (aarch64_pass_by_reference, aarch64_layout_arg, aarch64_pad_reg_upward)
        (aarch64_gimplify_va_arg_expr): Assert that we don't yet handle
        passing and returning SVE modes.
        (aarch64_function_value, aarch64_layout_arg): Use gen_int_mode
        rather than GEN_INT.
        (aarch64_emit_probe_stack_range): Take the size as a poly_int64
        rather than a HOST_WIDE_INT, but call sorry if it isn't constant.
        (aarch64_allocate_and_probe_stack_space): Likewise.
        (aarch64_layout_frame): Cope with polynomial offsets.
        (aarch64_save_callee_saves, aarch64_restore_callee_saves): Take the
        start_offset as a poly_int64 rather than a HOST_WIDE_INT.  Track
        polynomial offsets.
        (offset_9bit_signed_unscaled_p, offset_12bit_unsigned_scaled_p)
        (aarch64_offset_7bit_signed_scaled_p): Take the offset as a
        poly_int64 rather than a HOST_WIDE_INT.
        (aarch64_get_separate_components, aarch64_process_components)
        (aarch64_expand_prologue, aarch64_expand_epilogue)
        (aarch64_use_return_insn_p): Handle polynomial frame offsets.
        (aarch64_anchor_offset): New function, split out from...
        (aarch64_legitimize_address): ...here.
        (aarch64_builtin_vectorization_cost): Handle polynomial
        TYPE_VECTOR_SUBPARTS.
        (aarch64_simd_check_vect_par_cnst_half): Handle polynomial
        GET_MODE_NUNITS.
        (aarch64_simd_make_constant, aarch64_expand_vector_init): Get the
        number of elements from the PARALLEL rather than the mode.
        (aarch64_shift_truncation_mask): Use GET_MODE_UNIT_BITSIZE
        rather than GET_MODE_BITSIZE.
        (aarch64_evpc_trn, aarch64_evpc_uzp, aarch64_evpc_ext)
        (aarch64_evpc_rev, aarch64_evpc_dup, aarch64_evpc_zip)
        (aarch64_expand_vec_perm_const_1): Handle polynomial
        d->perm.length () and d->perm elements.
        (aarch64_evpc_tbl): Likewise.  Use nelt rather than GET_MODE_NUNITS.
        Apply to_constant to d->perm elements.
        (aarch64_simd_valid_immediate, aarch64_vec_fpconst_pow_of_2): Handle
        polynomial CONST_VECTOR_NUNITS.
        (aarch64_move_pointer): Take amount as a poly_int64 rather
        than an int.
        (aarch64_progress_pointer): Avoid temporary variable.
        * config/aarch64/aarch64.md (aarch64_<crc_variant>): Use
        the mode attribute instead of GET_MODE.

2018-01-11  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/aarch64/aarch64.c (aarch64_force_temporary): Assert that
        x exists before using it.
        (aarch64_add_constant_internal): Rename to...
        (aarch64_add_offset_1): ...this.  Replace regnum with separate
        src and dest rtxes.  Handle the case in which they're different,
        including when the offset is zero.  Replace scratchreg with an rtx.
        Use 2 additions if there is no spare register into which we can
        move a 16-bit constant.
        (aarch64_add_constant): Delete.
        (aarch64_add_offset): Replace reg with separate src and dest
        rtxes.  Take a poly_int64 offset instead of a HOST_WIDE_INT.
        Use aarch64_add_offset_1.
        (aarch64_add_sp, aarch64_sub_sp): Take the scratch register as
        an rtx rather than an int.  Take the delta as a poly_int64
        rather than a HOST_WIDE_INT.  Use aarch64_add_offset.
        (aarch64_expand_mov_immediate): Update uses of aarch64_add_offset.
        (aarch64_expand_prologue): Update calls to aarch64_sub_sp,
        aarch64_allocate_and_probe_stack_space and aarch64_add_offset.
        (aarch64_expand_epilogue): Update calls to aarch64_add_offset
        and aarch64_add_sp.
        (aarch64_output_mi_thunk): Use aarch64_add_offset rather than
        aarch64_add_constant.

2018-01-11  Richard Sandiford  <richard.sandiford@linaro.org>

        * config/aarch64/aarch64.c (aarch64_reinterpret_float_as_int):
        Use scalar_float_mode.

2018-01-11  Richard Sandiford  <richard.sandiford@linaro.org>

        * config/aarch64/aarch64-simd.md
        (aarch64_fml<f16mac1>l<f16quad>_low<mode>): Avoid GET_MODE_NUNITS.
        (aarch64_fml<f16mac1>l<f16quad>_high<mode>): Likewise.
        (aarch64_fml<f16mac1>l_lane_lowv2sf): Likewise.
        (aarch64_fml<f16mac1>l_lane_highv2sf): Likewise.
        (aarch64_fml<f16mac1>lq_laneq_lowv4sf): Likewise.
        (aarch64_fml<f16mac1>lq_laneq_highv4sf): Likewise.
        (aarch64_fml<f16mac1>l_laneq_lowv2sf): Likewise.
        (aarch64_fml<f16mac1>l_laneq_highv2sf): Likewise.
        (aarch64_fml<f16mac1>lq_lane_lowv4sf): Likewise.
        (aarch64_fml<f16mac1>lq_lane_highv4sf): Likewise.

2018-01-11  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

        PR target/83514
        * config/arm/arm.c (arm_declare_function_name): Set arch_to_print if
        targ_options->x_arm_arch_string is non NULL.

2018-01-11  Tamar Christina  <tamar.christina@arm.com>

        * config/aarch64/aarch64.h
        (AARCH64_FL_FOR_ARCH8_4): Add  AARCH64_FL_DOTPROD.

2018-01-11  Sudakshina Das  <sudi.das@arm.com>

        PR target/82096
        * expmed.c (emit_store_flag_force): Swap if const op0
        and change VOIDmode to mode of op0.

2018-01-11  Richard Sandiford  <richard.sandiford@linaro.org>

        PR rtl-optimization/83761
        * caller-save.c (replace_reg_with_saved_mem): Pass bits rather
        than bytes to mode_for_size.

2018-01-10  Jan Hubicka  <hubicka@ucw.cz>

        PR middle-end/83189
        * gfortran.fortran-torture/compile/pr83189.f90: New testcase.
        * tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Handle zero
        profile.

2018-01-10  Jan Hubicka  <hubicka@ucw.cz>

        PR middle-end/83575
        * cfgrtl.c (rtl_verify_edges): Only verify fixability of partition
        when in layout mode.
        (cfg_layout_finalize): Do not verify cfg before we are out of layout.
        * cfgcleanup.c (try_optimize_cfg): Only verify flow info when doing
        partition fixup.

2018-01-10  Michael Collison  <michael.collison@arm.com>

        * config/aarch64/aarch64-modes.def (V2HF): New VECTOR_MODE.
        * config/aarch64/aarch64-option-extension.def: Add
        AARCH64_OPT_EXTENSION of 'fp16fml'.
        * config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins):
        (__ARM_FEATURE_FP16_FML): Define if TARGET_F16FML is true.
        * config/aarch64/predicates.md (aarch64_lane_imm3): New predicate.
        * config/aarch64/constraints.md (Ui7): New constraint.
        * config/aarch64/iterators.md (VFMLA_W): New mode iterator.
        (VFMLA_SEL_W): Ditto.
        (f16quad): Ditto.
        (f16mac1): Ditto.
        (VFMLA16_LOW): New int iterator.
        (VFMLA16_HIGH): Ditto.
        (UNSPEC_FMLAL): New unspec.
        (UNSPEC_FMLSL): Ditto.
        (UNSPEC_FMLAL2): Ditto.
        (UNSPEC_FMLSL2): Ditto.
        (f16mac): New code attribute.
        * config/aarch64/aarch64-simd-builtins.def
        (aarch64_fmlal_lowv2sf): Ditto.
        (aarch64_fmlsl_lowv2sf): Ditto.
        (aarch64_fmlalq_lowv4sf): Ditto.
        (aarch64_fmlslq_lowv4sf): Ditto.
        (aarch64_fmlal_highv2sf): Ditto.
        (aarch64_fmlsl_highv2sf): Ditto.
        (aarch64_fmlalq_highv4sf): Ditto.
        (aarch64_fmlslq_highv4sf): Ditto.
        (aarch64_fmlal_lane_lowv2sf): Ditto.
        (aarch64_fmlsl_lane_lowv2sf): Ditto.
        (aarch64_fmlal_laneq_lowv2sf): Ditto.
        (aarch64_fmlsl_laneq_lowv2sf): Ditto.
        (aarch64_fmlalq_lane_lowv4sf): Ditto.
        (aarch64_fmlsl_lane_lowv4sf): Ditto.
        (aarch64_fmlalq_laneq_lowv4sf): Ditto.
        (aarch64_fmlsl_laneq_lowv4sf): Ditto.
        (aarch64_fmlal_lane_highv2sf): Ditto.
        (aarch64_fmlsl_lane_highv2sf): Ditto.
        (aarch64_fmlal_laneq_highv2sf): Ditto.
        (aarch64_fmlsl_laneq_highv2sf): Ditto.
        (aarch64_fmlalq_lane_highv4sf): Ditto.
        (aarch64_fmlsl_lane_highv4sf): Ditto.
        (aarch64_fmlalq_laneq_highv4sf): Ditto.
        (aarch64_fmlsl_laneq_highv4sf): Ditto.
        * config/aarch64/aarch64-simd.md:
        (aarch64_fml<f16mac1>l<f16quad>_low<mode>): New pattern.
        (aarch64_fml<f16mac1>l<f16quad>_high<mode>): Ditto.
        (aarch64_simd_fml<f16mac1>l<f16quad>_low<mode>): Ditto.
        (aarch64_simd_fml<f16mac1>l<f16quad>_high<mode>): Ditto.
        (aarch64_fml<f16mac1>l_lane_lowv2sf): Ditto.
        (aarch64_fml<f16mac1>l_lane_highv2sf): Ditto.
        (aarch64_simd_fml<f16mac>l_lane_lowv2sf): Ditto.
        (aarch64_simd_fml<f16mac>l_lane_highv2sf): Ditto.
        (aarch64_fml<f16mac1>lq_laneq_lowv4sf): Ditto.
        (aarch64_fml<f16mac1>lq_laneq_highv4sf): Ditto.
        (aarch64_simd_fml<f16mac>lq_laneq_lowv4sf): Ditto.
        (aarch64_simd_fml<f16mac>lq_laneq_highv4sf): Ditto.
        (aarch64_fml<f16mac1>l_laneq_lowv2sf): Ditto.
        (aarch64_fml<f16mac1>l_laneq_highv2sf): Ditto.
        (aarch64_simd_fml<f16mac>l_laneq_lowv2sf): Ditto.
        (aarch64_simd_fml<f16mac>l_laneq_highv2sf): Ditto.
        (aarch64_fml<f16mac1>lq_lane_lowv4sf): Ditto.
        (aarch64_fml<f16mac1>lq_lane_highv4sf): Ditto.
        (aarch64_simd_fml<f16mac>lq_lane_lowv4sf): Ditto.
        (aarch64_simd_fml<f16mac>lq_lane_highv4sf): Ditto.
        * config/aarch64/arm_neon.h (vfmlal_low_u32): New intrinsic.
        (vfmlsl_low_u32): Ditto.
        (vfmlalq_low_u32): Ditto.
        (vfmlslq_low_u32): Ditto.
        (vfmlal_high_u32): Ditto.
        (vfmlsl_high_u32): Ditto.
        (vfmlalq_high_u32): Ditto.
        (vfmlslq_high_u32): Ditto.
        (vfmlal_lane_low_u32): Ditto.
        (vfmlsl_lane_low_u32): Ditto.
        (vfmlal_laneq_low_u32): Ditto.
        (vfmlsl_laneq_low_u32): Ditto.
        (vfmlalq_lane_low_u32): Ditto.
        (vfmlslq_lane_low_u32): Ditto.
        (vfmlalq_laneq_low_u32): Ditto.
        (vfmlslq_laneq_low_u32): Ditto.
        (vfmlal_lane_high_u32): Ditto.
        (vfmlsl_lane_high_u32): Ditto.
        (vfmlal_laneq_high_u32): Ditto.
        (vfmlsl_laneq_high_u32): Ditto.
        (vfmlalq_lane_high_u32): Ditto.
        (vfmlslq_lane_high_u32): Ditto.
        (vfmlalq_laneq_high_u32): Ditto.
        (vfmlslq_laneq_high_u32): Ditto.
        * config/aarch64/aarch64.h (AARCH64_FL_F16SML): New flag.
        (AARCH64_FL_FOR_ARCH8_4): New.
        (AARCH64_ISA_F16FML): New ISA flag.
        (TARGET_F16FML): New feature flag for fp16fml.
        (doc/invoke.texi): Document new fp16fml option.

2018-01-10  Michael Collison  <michael.collison@arm.com>

        * config/aarch64/aarch64-builtins.c:
        (aarch64_types_ternopu_imm_qualifiers, TYPES_TERNOPUI): New.
        * config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins):
        (__ARM_FEATURE_SHA3): Define if TARGET_SHA3 is true.
        * config/aarch64/aarch64.h (AARCH64_FL_SHA3): New flags.
        (AARCH64_ISA_SHA3): New ISA flag.
        (TARGET_SHA3): New feature flag for sha3.
        * config/aarch64/iterators.md (sha512_op): New int attribute.
        (CRYPTO_SHA512): New int iterator.
        (UNSPEC_SHA512H): New unspec.
        (UNSPEC_SHA512H2): Ditto.
        (UNSPEC_SHA512SU0): Ditto.
        (UNSPEC_SHA512SU1): Ditto.
        * config/aarch64/aarch64-simd-builtins.def
        (aarch64_crypto_sha512hqv2di): New builtin.
        (aarch64_crypto_sha512h2qv2di): Ditto.
        (aarch64_crypto_sha512su0qv2di): Ditto.
        (aarch64_crypto_sha512su1qv2di): Ditto.
        (aarch64_eor3qv8hi): Ditto.
        (aarch64_rax1qv2di): Ditto.
        (aarch64_xarqv2di): Ditto.
        (aarch64_bcaxqv8hi): Ditto.
        * config/aarch64/aarch64-simd.md:
        (aarch64_crypto_sha512h<sha512_op>qv2di): New pattern.
        (aarch64_crypto_sha512su0qv2di): Ditto.
        (aarch64_crypto_sha512su1qv2di): Ditto.
        (aarch64_eor3qv8hi): Ditto.
        (aarch64_rax1qv2di): Ditto.
        (aarch64_xarqv2di): Ditto.
        (aarch64_bcaxqv8hi): Ditto.
        * config/aarch64/arm_neon.h (vsha512hq_u64): New intrinsic.
        (vsha512h2q_u64): Ditto.
        (vsha512su0q_u64): Ditto.
        (vsha512su1q_u64): Ditto.
        (veor3q_u16): Ditto.
        (vrax1q_u64): Ditto.
        (vxarq_u64): Ditto.
        (vbcaxq_u16): Ditto.
        * config/arm/types.md (crypto_sha512): New type attribute.
        (crypto_sha3): Ditto.
        (doc/invoke.texi): Document new sha3 option.

2018-01-10  Michael Collison  <michael.collison@arm.com>

        * config/aarch64/aarch64-builtins.c:
        (aarch64_types_quadopu_imm_qualifiers, TYPES_QUADOPUI): New.
        * config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins):
        (__ARM_FEATURE_SM3): Define if TARGET_SM4 is true.
        (__ARM_FEATURE_SM4): Define if TARGET_SM4 is true.
        * config/aarch64/aarch64.h (AARCH64_FL_SM4): New flags.
        (AARCH64_ISA_SM4): New ISA flag.
        (TARGET_SM4): New feature flag for sm4.
        * config/aarch64/aarch64-simd-builtins.def
        (aarch64_sm3ss1qv4si): Ditto.
        (aarch64_sm3tt1aq4si): Ditto.
        (aarch64_sm3tt1bq4si): Ditto.
        (aarch64_sm3tt2aq4si): Ditto.
        (aarch64_sm3tt2bq4si): Ditto.
        (aarch64_sm3partw1qv4si): Ditto.
        (aarch64_sm3partw2qv4si): Ditto.
        (aarch64_sm4eqv4si): Ditto.
        (aarch64_sm4ekeyqv4si): Ditto.
        * config/aarch64/aarch64-simd.md:
        (aarch64_sm3ss1qv4si): Ditto.
        (aarch64_sm3tt<sm3tt_op>qv4si): Ditto.
        (aarch64_sm3partw<sm3part_op>qv4si): Ditto.
        (aarch64_sm4eqv4si): Ditto.
        (aarch64_sm4ekeyqv4si): Ditto.
        * config/aarch64/iterators.md (sm3tt_op): New int iterator.
        (sm3part_op): Ditto.
        (CRYPTO_SM3TT): Ditto.
        (CRYPTO_SM3PART): Ditto.
        (UNSPEC_SM3SS1): New unspec.
        (UNSPEC_SM3TT1A): Ditto.
        (UNSPEC_SM3TT1B): Ditto.
        (UNSPEC_SM3TT2A): Ditto.
        (UNSPEC_SM3TT2B): Ditto.
        (UNSPEC_SM3PARTW1): Ditto.
        (UNSPEC_SM3PARTW2): Ditto.
        (UNSPEC_SM4E): Ditto.
        (UNSPEC_SM4EKEY): Ditto.
        * config/aarch64/constraints.md (Ui2): New constraint.
        * config/aarch64/predicates.md (aarch64_imm2): New predicate.
        * config/arm/types.md (crypto_sm3): New type attribute.
        (crypto_sm4): Ditto.
        * config/aarch64/arm_neon.h (vsm3ss1q_u32): New intrinsic.
        (vsm3tt1aq_u32): Ditto.
        (vsm3tt1bq_u32): Ditto.
        (vsm3tt2aq_u32): Ditto.
        (vsm3tt2bq_u32): Ditto.
        (vsm3partw1q_u32): Ditto.
        (vsm3partw2q_u32): Ditto.
        (vsm4eq_u32): Ditto.
        (vsm4ekeyq_u32): Ditto.
        (doc/invoke.texi): Document new sm4 option.

2018-01-10  Michael Collison  <michael.collison@arm.com>

        * config/aarch64/aarch64-arches.def (armv8.4-a): New architecture.
        * config/aarch64/aarch64.h (AARCH64_ISA_V8_4): New ISA flag.
        (AARCH64_FL_FOR_ARCH8_4): New.
        (AARCH64_FL_V8_4): New flag.
        (doc/invoke.texi): Document new armv8.4-a option.

2018-01-10  Michael Collison  <michael.collison@arm.com>

        * config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins):
        (__ARM_FEATURE_AES): Define if TARGET_AES is true.
        (__ARM_FEATURE_SHA2): Define if TARGET_SHA2 is true.
        * config/aarch64/aarch64-option-extension.def: Add
        AARCH64_OPT_EXTENSION of 'sha2'.
        (aes): Add AARCH64_OPT_EXTENSION of 'aes'.
        (crypto): Disable sha2 and aes if crypto disabled.
        (crypto): Enable aes and sha2 if enabled.
        (simd): Disable sha2 and aes if simd disabled.
        * config/aarch64/aarch64.h (AARCH64_FL_AES, AARCH64_FL_SHA2):
        New flags.
        (AARCH64_ISA_AES, AARCH64_ISA_SHA2): New ISA flags.
        (TARGET_SHA2): New feature flag for sha2.
        (TARGET_AES): New feature flag for aes.
        * config/aarch64/aarch64-simd.md:
        (aarch64_crypto_aes<aes_op>v16qi): Make pattern
        conditional on TARGET_AES.
        (aarch64_crypto_aes<aesmc_op>v16qi): Ditto.
        (aarch64_crypto_sha1hsi): Make pattern conditional
        on TARGET_SHA2.
        (aarch64_crypto_sha1hv4si): Ditto.
        (aarch64_be_crypto_sha1hv4si): Ditto.
        (aarch64_crypto_sha1su1v4si): Ditto.
        (aarch64_crypto_sha1<sha1_op>v4si): Ditto.
        (aarch64_crypto_sha1su0v4si): Ditto.
        (aarch64_crypto_sha256h<sha256_op>v4si): Ditto.
        (aarch64_crypto_sha256su0v4si): Ditto.
        (aarch64_crypto_sha256su1v4si): Ditto.
        (doc/invoke.texi): Document new aes and sha2 options.

2018-01-10  Martin Sebor  <msebor@redhat.com>

        PR tree-optimization/83781
        * gimple-fold.c (get_range_strlen): Avoid treating arrays of pointers
        as string arrays.

2018-01-11  Martin Sebor  <msebor@gmail.com>
            Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

        PR tree-optimization/83501
        PR tree-optimization/81703

        * tree-ssa-strlen.c (get_string_cst): Rename...
        (get_string_len): ...to this.  Handle global constants.
        (handle_char_store): Adjust.

2018-01-10  Kito Cheng  <kito.cheng@gmail.com>
            Jim Wilson  <jimw@sifive.com>

        * config/riscv/riscv-protos.h (riscv_output_return): New.
        * config/riscv/riscv.c (struct machine_function): New naked_p field.
        (riscv_attribute_table, riscv_output_return),
        (riscv_handle_fndecl_attribute, riscv_naked_function_p),
        (riscv_allocate_stack_slots_for_args, riscv_warn_func_return): New.
        (riscv_compute_frame_info): Only compute frame->mask if not a naked
        function.
        (riscv_expand_prologue): Add early return for naked function.
        (riscv_expand_epilogue): Likewise.
        (riscv_function_ok_for_sibcall): Return false for naked function.
        (riscv_set_current_function): New.
        (TARGET_SET_CURRENT_FUNCTION, TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS),
        (TARGET_ATTRIBUTE_TABLE, TARGET_WARN_FUNC_RETURN): New.
        * config/riscv/riscv.md (simple_return): Call riscv_output_return.
        * doc/extend.texi (RISC-V Function Attributes): New.

2018-01-10  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * config/rs6000/rs6000.c (is_complex_IBM_long_double): Explicitly
        check for 128-bit long double before checking TCmode.
        * config/rs6000/rs6000.h (FLOAT128_IEEE_P): Explicitly check for
        128-bit long doubles before checking TFmode or TCmode.
        (FLOAT128_IBM_P): Likewise.

2018-01-10  Martin Sebor  <msebor@redhat.com>

        PR tree-optimization/83671
        * builtins.c (c_strlen): Unconditionally return zero for the empty
        string.
        Use -Warray-bounds for warnings.
        * gimple-fold.c (get_range_strlen): Handle non-constant lengths
        for non-constant array indices with COMPONENT_REF, arrays of
        arrays, and pointers to arrays.
        (gimple_fold_builtin_strlen): Determine and set length range for
        non-constant character arrays.

2018-01-10  Aldy Hernandez  <aldyh@redhat.com>

        PR middle-end/81897
        * tree-ssa-uninit.c (convert_control_dep_chain_into_preds): Skip
        empty blocks.

2018-01-10  Eric Botcazou  <ebotcazou@adacore.com>

        * dwarf2out.c (dwarf2out_var_location): Do not pass NULL to fprintf.

2018-01-10  Peter Bergner  <bergner@vnet.ibm.com>

        PR target/83399
        * config/rs6000/rs6000.c (print_operand) <'y'>: Use
        VECTOR_MEM_ALTIVEC_OR_VSX_P.
        * config/rs6000/vsx.md (*vsx_le_perm_load_<mode> for VSX_D): Use
        indexed_or_indirect_operand predicate.
        (*vsx_le_perm_load_<mode> for VSX_W): Likewise.
        (*vsx_le_perm_load_v8hi): Likewise.
        (*vsx_le_perm_load_v16qi): Likewise.
        (*vsx_le_perm_store_<mode> for VSX_D): Likewise.
        (*vsx_le_perm_store_<mode> for VSX_W): Likewise.
        (*vsx_le_perm_store_v8hi): Likewise.
        (*vsx_le_perm_store_v16qi): Likewise.
        (eight unnamed splitters): Likewise.

2018-01-10  Peter Bergner  <bergner@vnet.ibm.com>

        * config/rs6000/x86intrin.h: Change #warning to #error. Update message.
        * config/rs6000/emmintrin.h: Likewise.
        * config/rs6000/mmintrin.h: Likewise.
        * config/rs6000/xmmintrin.h: Likewise.

2018-01-10  David Malcolm  <dmalcolm@redhat.com>

        PR c++/43486
        * tree-core.h: Document EXPR_LOCATION_WRAPPER_P's usage of
        "public_flag".
        * tree.c (tree_nop_conversion): Return true for location wrapper
        nodes.
        (maybe_wrap_with_location): New function.
        (selftest::check_strip_nops): New function.
        (selftest::test_location_wrappers): New function.
        (selftest::tree_c_tests): Call it.
        * tree.h (STRIP_ANY_LOCATION_WRAPPER): New macro.
        (maybe_wrap_with_location): New decl.
        (EXPR_LOCATION_WRAPPER_P): New macro.
        (location_wrapper_p): New inline function.
        (tree_strip_any_location_wrapper): New inline function.

2018-01-10  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/83735
        * config/i386/i386.c (ix86_compute_frame_layout): Always adjust
        stack_realign_offset for the largest alignment of stack slot
        actually used.
        (ix86_find_max_used_stack_alignment): New function.
        (ix86_finalize_stack_frame_flags): Use it.  Set
        max_used_stack_alignment if we don't realign stack.
        * config/i386/i386.h (machine_function): Add
        max_used_stack_alignment.

2018-01-10  Christophe Lyon  <christophe.lyon@linaro.org>

        * config/arm/arm.opt (-mbranch-cost): New option.
        * config/arm/arm.h (BRANCH_COST): Take arm_branch_cost into
        account.

2018-01-10  Segher Boessenkool  <segher@kernel.crashing.org>

        PR target/83629
        * config/rs6000/rs6000.md (load_toc_v4_PIC_2, load_toc_v4_PIC_3b,
        load_toc_v4_PIC_3c): Wrap const term in CONST RTL.

2018-01-10  Richard Biener  <rguenther@suse.de>

        PR debug/83765
        * dwarf2out.c (gen_subprogram_die): Hoist old_die && declaration
        early out so it also covers the case where we have a non-NULL
        origin.

2018-01-10  Richard Sandiford  <richard.sandiford@linaro.org>

        PR tree-optimization/83753
        * tree-vect-stmts.c (get_group_load_store_type): Use VMAT_CONTIGUOUS
        for non-strided grouped accesses if the number of elements is 1.

2018-01-10  Jan Hubicka  <hubicka@ucw.cz>

        PR target/81616
        * i386.c (ix86_vectorize_builtin_gather): Check TARGET_USE_GATHER.
        * i386.h (TARGET_USE_GATHER): Define.
        * x86-tune.def (X86_TUNE_USE_GATHER): New.

2018-01-10  Martin Liska  <mliska@suse.cz>

        PR bootstrap/82831
        * basic-block.h (CLEANUP_NO_PARTITIONING): New define.
        * bb-reorder.c (pass_reorder_blocks::execute): Do not clean up
        partitioning.
        * cfgcleanup.c (try_optimize_cfg): Fix up partitioning if
        CLEANUP_NO_PARTITIONING is not set.

2018-01-10  Richard Sandiford  <richard.sandiford@linaro.org>

        * doc/rtl.texi: Remove documentation of (const ...) wrappers
        for vectors, as a partial revert of r254296.
        * rtl.h (const_vec_p): Delete.
        (const_vec_duplicate_p): Don't test for vector CONSTs.
        (unwrap_const_vec_duplicate, const_vec_series_p): Likewise.
        * expmed.c (make_tree): Likewise.

        Revert:
        * common.md (E, F): Use CONSTANT_P instead of checking for
        CONST_VECTOR.
        * emit-rtl.c (gen_lowpart_common): Use const_vec_p instead of
        checking for CONST_VECTOR.

2018-01-09  Jan Hubicka  <hubicka@ucw.cz>

        PR middle-end/83575
        * predict.c (force_edge_cold): Handle in more sane way edges
        with no prediction.

2018-01-09  Carl Love  <cel@us.ibm.com>

        * config/rs6002/altivec.md (p8_vmrgow): Add support for V2DI, V2DF,
        V4SI, V4SF types.
        (p8_vmrgew): Add support for V2DI, V2DF, V4SF types.
        * config/rs6000/rs6000-builtin.def: Add definitions for FLOAT2_V2DF,
        VMRGEW_V2DI, VMRGEW_V2DF, VMRGEW_V4SF, VMRGOW_V4SI, VMRGOW_V4SF,
        VMRGOW_V2DI, VMRGOW_V2DF.  Remove definition for VMRGOW.
        * config/rs6000/rs6000-c.c (VSX_BUILTIN_VEC_FLOAT2,
        P8V_BUILTIN_VEC_VMRGEW, P8V_BUILTIN_VEC_VMRGOW):  Add definitions.
        * config/rs6000/rs6000-protos.h: Add extern defition for
        rs6000_generate_float2_double_code.
        * config/rs6000/rs6000.c (rs6000_generate_float2_double_code): Add
        function.
        * config/rs6000/vsx.md (vsx_xvcdpsp): Add define_insn.
        (float2_v2df): Add define_expand.

2018-01-09  Uros Bizjak  <ubizjak@gmail.com>

        PR target/83628
        * combine.c (force_int_to_mode) <case ASHIFT>: Use mode instead of
        op_mode in the force_to_mode call.

2018-01-09  Richard Sandiford  <richard.sandiford@linaro.org>

        * config/aarch64/aarch64.c (aarch64_evpc_trn): Use d.perm.series_p
        instead of checking each element individually.
        (aarch64_evpc_uzp): Likewise.
        (aarch64_evpc_zip): Likewise.
        (aarch64_evpc_ext): Likewise.
        (aarch64_evpc_rev): Likewise.
        (aarch64_evpc_dup): Test the encoding for a single duplicated element,
        instead of checking each element individually.  Return true without
        generating rtl if
        (aarch64_vectorize_vec_perm_const): Use all_from_input_p to test
        whether all selected elements come from the same input, instead of
        checking each element individually.  Remove calls to gen_rtx_REG,
        start_sequence and end_sequence and instead assert that no rtl is
        generated.

2018-01-09  Richard Sandiford  <richard.sandiford@linaro.org>

        * config/aarch64/aarch64.c (aarch64_legitimate_constant_p): Fix
        order of HIGH and CONST checks.

2018-01-09  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-stmts.c (permute_vec_elements): Create a fresh variable
        if the destination isn't an SSA_NAME.

2018-01-09  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83668
        * graphite.c (canonicalize_loop_closed_ssa): Add edge argument,
        move prologue...
        (canonicalize_loop_form): ... here, renamed from ...
        (canonicalize_loop_closed_ssa_form): ... this and amended to
        swap successor edges for loop exit blocks to make us use
        the RPO order we need for initial schedule generation.

2018-01-09  Joseph Myers  <joseph@codesourcery.com>

        PR tree-optimization/64811
        * match.pd: When optimizing comparisons with Inf, avoid
        introducing or losing exceptions from comparisons with NaN.

2018-01-09  Martin Liska  <mliska@suse.cz>

        PR sanitizer/82517
        * asan.c (shadow_mem_size): Add gcc_assert.

2018-01-09  Georg-Johann Lay  <avr@gjlay.de>

        Don't save registers in main().

        PR target/83738
        * doc/invoke.texi (AVR Options) [-mmain-is-OS_task]: Document it.
        * config/avr/avr.opt (-mmain-is-OS_task): New target option.
        * config/avr/avr.c (avr_set_current_function): Don't error if
        naked, OS_task or OS_main are specified at the same time.
        (avr_function_ok_for_sibcall): Don't disable sibcalls for OS_task,
        OS_main.
        (avr_insert_attributes) [-mmain-is-OS_task] <main>: Add OS_task
        attribute.
        * common/config/avr/avr-common.c (avr_option_optimization_table):
        Switch on -mmain-is-OS_task for optimizing compilations.

2018-01-09  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83572
        * graphite.c: Include cfganal.h.
        (graphite_transform_loops): Connect infinite loops to exit
        and remove fake edges at the end.

2018-01-09  Jan Hubicka  <hubicka@ucw.cz>

        * ipa-inline.c (edge_badness): Revert accidental checkin.

2018-01-09  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/80763
        * ipa-comdats.c (set_comdat_group): Only set comdat group of real
        symbols; not inline clones.

2018-01-09  Jakub Jelinek  <jakub@redhat.com>

        PR target/83507
        * modulo-sched.c (schedule_reg_moves): Punt if we'd need to move
        hard registers.  Formatting fixes.

        PR preprocessor/83722
        * gcc.c (try_generate_repro): Pass
        &temp_stderr_files[RETRY_ICE_ATTEMPTS - 1] rather than
        &temp_stdout_files[RETRY_ICE_ATTEMPTS - 1] as last argument to
        do_report_bug.

2018-01-08  Monk Chiang  <sh.chiang04@gmail.com>
            Kito Cheng  <kito.cheng@gmail.com>

        * config/riscv/riscv.c (machine_function::is_leaf): Remove field.
        (riscv_leaf_function_p): Delete.
        (riscv_function_ok_for_sibcall): Return false when TARGET_SAVE_RESTORE.

2018-01-08  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * config/rs6000/rs6000-string.c (do_load_for_compare_from_addr): New
        function.
        (do_ifelse): New function.
        (do_isel): New function.
        (do_sub3): New function.
        (do_add3): New function.
        (do_load_mask_compare): New function.
        (do_overlap_load_compare): New function.
        (expand_compare_loop): New function.
        (expand_block_compare): Call expand_compare_loop() when appropriate.
        * config/rs6000/rs6000.opt (-mblock-compare-inline-limit): Change
        option description.
        (-mblock-compare-inline-loop-limit): New option.

2018-01-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR target/83677
        * config/rs6000/altivec.md (*altivec_vpermr_<mode>_internal):
        Reverse order of second and third operands in first alternative.
        * config/rs6000/rs6000.c (rs6000_expand_vector_set): Reverse order
        of first and second elements in UNSPEC_VPERMR vector.
        (altivec_expand_vec_perm_le): Likewise.

2017-01-08  Jeff Law  <law@redhat.com>

        PR rtl-optimizatin/81308
        * tree-switch-conversion.c (cfg_altered): New file scoped static.
        (process_switch): If group_case_labels makes a change, then set
        cfg_altered.
        (pass_convert_switch::execute): If a switch is converted, then
        set cfg_altered.  Return TODO_cfg_cleanup if cfg_altered is true.

        PR rtl-optimization/81308
        * recog.c (split_all_insns): Conditionally cleanup the CFG after
        splitting insns.

2018-01-08  Vidya Praveen  <vidyapraveen@arm.com>

        PR target/83663 - Revert r255946
        * config/aarch64/aarch64.c (aarch64_expand_vector_init): Modify code
        generation for cases where splatting a value is not useful.
        * simplify-rtx.c (simplify_ternary_operation): Simplify vec_merge
        across a vec_duplicate and a paradoxical subreg forming a vector
        mode to a vec_concat.

2018-01-08  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        * config/arm/t-aprofile (MULTILIB_MATCHES): Add mapping rules for
        -march=armv8.3-a variants.
        * config/arm/t-multilib: Likewise.
        * config/arm/t-arm-elf: Likewise.  Handle dotprod extension.

2018-01-08  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * config/rs6000/rs6000.md (cceq_ior_compare): Remove * so I can use it
        to generate rtl.
        (cceq_ior_compare_complement): Give it a name so I can use it, and
        change boolean_or_operator predicate to boolean_operator so it can
        be used to generate a crand.
        (eqne): New code iterator.
        (bd/bd_neg): New code_attrs.
        (<bd>_<mode>): New name for ctr<mode>_internal[12] now combined into
        a single define_insn.
        (<bd>tf_<mode>): A new insn pattern for the conditional form branch
        decrement (bdnzt/bdnzf/bdzt/bdzf).
        * config/rs6000/rs6000.c (rs6000_legitimate_combined_insn): Updated
        with the new names of the branch decrement patterns, and added the
        names of the branch decrement conditional patterns.

2018-01-08  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83563
        * graphite.c (canonicalize_loop_closed_ssa_form): Reset the SCEV
        cache.

2018-01-08  Richard Biener  <rguenther@suse.de>

        PR middle-end/83713
        * convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.

2018-01-08  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83685
        * tree-ssa-pre.c (create_expression_by_pieces): Do not insert
        references to abnormals.

2018-01-08  Richard Biener  <rguenther@suse.de>

        PR lto/83719
        * dwarf2out.c (output_indirect_strings): Handle empty
        skeleton_debug_str_hash.
        (dwarf2out_early_finish): Index strings for -gsplit-dwarf.

2018-01-08  Claudiu Zissulescu  <claziss@synopsys.com>

        * config/arc/arc.c (TARGET_TRAMPOLINE_ADJUST_ADDRESS): Delete.
        (emit_store_direct): Likewise.
        (arc_trampoline_adjust_address): Likewise.
        (arc_asm_trampoline_template): New function.
        (arc_initialize_trampoline): Use asm_trampoline_template.
        (TARGET_ASM_TRAMPOLINE_TEMPLATE): Define.
        * config/arc/arc.h (TRAMPOLINE_SIZE): Adjust to 16.
        * config/arc/arc.md (flush_icache): Delete pattern.

2018-01-08  Claudiu Zissulescu  <claziss@synopsys.com>

        * config/arc/arc-c.def (__ARC_UNALIGNED__): New define.
        * config/arc/arc.h (STRICT_ALIGNMENT): Control this macro using
        munaligned-access.

2018-01-08  Sebastian Huber  <sebastian.huber@embedded-brains.de>

        PR target/83681
        * config/epiphany/epiphany.h (make_pass_mode_switch_use): Guard
        by not USED_FOR_TARGET.
        (make_pass_resolve_sw_modes): Likewise.

2018-01-08  Sebastian Huber  <sebastian.huber@embedded-brains.de>

        * config/nios2/nios2.h (nios2_section_threshold): Guard by not
        USED_FOR_TARGET.

2018-01-08  Richard Biener  <rguenther@suse.de>

        PR middle-end/83580
        * tree-data-ref.c (split_constant_offset): Remove STRIP_NOPS.

2018-01-08  Richard Biener  <rguenther@suse.de>

        PR middle-end/83517
        * match.pd ((t * 2) / 2) -> t): Add missing :c.

2018-01-06  Aldy Hernandez  <aldyh@redhat.com>

        PR middle-end/81897
        * tree-ssa-uninit.c (compute_control_dep_chain): Do not bail on
        basic blocks with a small number of successors.
        (convert_control_dep_chain_into_preds): Improve handling of
        forwarder blocks.
        (dump_predicates): Split apart into...
        (dump_pred_chain): ...here...
        (dump_pred_info): ...and here.
        (can_one_predicate_be_invalidated_p): Add debugging printfs.
        (can_chain_union_be_invalidated_p): Improve check for invalidation
        of paths.
        (uninit_uses_cannot_happen): Avoid unnecessary if
        convert_control_dep_chain_into_preds yielded nothing.

2018-01-06  Martin Sebor  <msebor@redhat.com>

        PR tree-optimization/83640
        * gimple-ssa-warn-restrict.c (builtin_access::builtin_access): Avoid
        subtracting negative offset from size.
        (builtin_access::overlap): Adjust offset bounds of the access to fall
        within the size of the object if possible.

2018-01-06  Richard Sandiford  <richard.sandiford@linaro.org>

        PR rtl-optimization/83699
        * expmed.c (extract_bit_field_1): Restrict the vector usage of
        extract_bit_field_as_subreg to cases in which the extracted
        value is also a vector.

        * lra-constraints.c (process_alt_operands): Test for the equivalence
        substitutions when detecting a possible reload cycle.

2018-01-06  Jakub Jelinek  <jakub@redhat.com>

        PR debug/83480
        * toplev.c (process_options): Don't enable debug_nonbind_markers_p
        by default if flag_selective_schedling{,2}.  Formatting fixes.

        PR rtl-optimization/83682
        * rtl.h (const_vec_duplicate_p): Only return true for VEC_DUPLICATE
        if it has non-VECTOR_MODE element mode.
        (vec_duplicate_p): Likewise.

        PR middle-end/83694
        * cfgexpand.c (expand_debug_expr): Punt if mode1 is VOIDmode
        and bitsize might be greater than MAX_BITSIZE_MODE_ANY_INT.

2018-01-05  Jakub Jelinek  <jakub@redhat.com>

        PR target/83604
        * config/i386/i386-builtin.def
        (__builtin_ia32_vgf2p8affineinvqb_v64qi,
        __builtin_ia32_vgf2p8affineqb_v64qi, __builtin_ia32_vgf2p8mulb_v64qi):
        Require also OPTION_MASK_ISA_AVX512F in addition to
        OPTION_MASK_ISA_GFNI.
        (__builtin_ia32_vgf2p8affineinvqb_v16qi_mask,
        __builtin_ia32_vgf2p8affineqb_v16qi_mask): Require
        OPTION_MASK_ISA_AVX512VL instead of OPTION_MASK_ISA_SSE in addition
        to OPTION_MASK_ISA_GFNI.
        (__builtin_ia32_vgf2p8mulb_v32qi_mask): Require
        OPTION_MASK_ISA_AVX512VL in addition to OPTION_MASK_ISA_GFNI and
        OPTION_MASK_ISA_AVX512BW.
        (__builtin_ia32_vgf2p8mulb_v16qi_mask): Require
        OPTION_MASK_ISA_AVX512VL instead of OPTION_MASK_ISA_AVX512BW in
        addition to OPTION_MASK_ISA_GFNI.
        (__builtin_ia32_vgf2p8affineinvqb_v16qi,
        __builtin_ia32_vgf2p8affineqb_v16qi, __builtin_ia32_vgf2p8mulb_v16qi):
        Require OPTION_MASK_ISA_SSE2 instead of OPTION_MASK_ISA_SSE in addition
        to OPTION_MASK_ISA_GFNI.
        * config/i386/i386.c (def_builtin): Change to builtin isa/isa2 being
        a requirement for all ISAs rather than any of them with a few
        exceptions.
        (ix86_add_new_builtins): Clear OPTION_MASK_ISA_64BIT from isa before
        processing.
        (ix86_expand_builtin): Require all ISAs from builtin's isa and isa2
        bitmasks to be enabled with 3 exceptions, instead of requiring any
        enabled ISA with lots of exceptions.
        * config/i386/sse.md (vgf2p8affineinvqb_<mode><mask_name>,
        vgf2p8affineqb_<mode><mask_name>, vgf2p8mulb_<mode><mask_name>):
        Change avx512bw in isa attribute to avx512f.
        * config/i386/sgxintrin.h: Add license boilerplate.
        * config/i386/vaesintrin.h: Likewise.  Fix macro spelling __AVX512F
        to __AVX512F__ and __AVX512VL to __AVX512VL__.
        (_mm256_aesdec_epi128, _mm256_aesdeclast_epi128, _mm256_aesenc_epi128,
        _mm256_aesenclast_epi128): Enable temporarily avx if __AVX__ is not
        defined.
        * config/i386/gfniintrin.h (_mm_gf2p8mul_epi8,
        _mm_gf2p8affineinv_epi64_epi8, _mm_gf2p8affine_epi64_epi8): Enable
        temporarily sse2 rather than sse if not enabled already.

        PR target/83604
        * config/i386/sse.md (VI248_VLBW): Rename to ...
        (VI248_AVX512VL): ... this.  Don't guard V32HI with TARGET_AVX512BW.
        (vpshrd_<mode><mask_name>, vpshld_<mode><mask_name>,
        vpshrdv_<mode>, vpshrdv_<mode>_mask, vpshrdv_<mode>_maskz,
        vpshrdv_<mode>_maskz_1, vpshldv_<mode>, vpshldv_<mode>_mask,
        vpshldv_<mode>_maskz, vpshldv_<mode>_maskz_1): Use VI248_AVX512VL
        mode iterator instead of VI248_VLBW.

2018-01-05  Jan Hubicka  <hubicka@ucw.cz>

        * ipa-fnsummary.c (record_modified_bb_info): Add OP.
        (record_modified): Skip clobbers; add debug output.
        (param_change_prob): Use sreal frequencies.

2018-01-05  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-data-refs.c (vect_compute_data_ref_alignment): Don't
        punt for user-aligned variables.

2018-01-05  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-chrec.c (chrec_contains_symbols): Return true for
        POLY_INT_CST.

2018-01-05  Sudakshina Das  <sudi.das@arm.com>

        PR target/82439
        * simplify-rtx.c (simplify_relational_operation_1): Add simplifications
        of (x|y) == x for BICS pattern.

2018-01-05  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/83605
        * gimple-ssa-strength-reduction.c: Include tree-eh.h.
        (find_candidates_dom_walker::before_dom_children): Ignore stmts that
        can throw.

2018-01-05  Sebastian Huber  <sebastian.huber@embedded-brains.de>

        * config.gcc (epiphany-*-elf*): Add (epiphany-*-rtems*) configuration.
        * config/epiphany/rtems.h: New file.

2018-01-04  Jakub Jelinek  <jakub@redhat.com>
            Uros Bizjak  <ubizjak@gmail.com>

        PR target/83554
        * config/i386/i386.md (*<rotate_insn>hi3_1 splitter): Use
        QIreg_operand instead of register_operand predicate.
        * config/i386/i386.c (ix86_rop_should_change_byte_p,
        set_rop_modrm_reg_bits, ix86_mitigate_rop): Use -mmitigate-rop in
        comments instead of -fmitigate[-_]rop.

2018-01-04  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

        PR bootstrap/81926
        * cgraphunit.c (symbol_table::compile): Switch to text_section
        before calling assembly_start debug hook.
        * run-rtl-passes.c (run_rtl_passes): Likewise.
        Include output.h.

2018-01-04  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vrp.c (extract_range_from_binary_expr_1): Check
        range_int_cst_p rather than !symbolic_range_p before calling
        extract_range_from_multiplicative_op_1.

2017-01-04  Jeff Law  <law@redhat.com>

        * tree-ssa-math-opts.c (execute_cse_reciprocals_1): Remove
        redundant test in assertion.

2018-01-04  Richard Sandiford  <richard.sandiford@linaro.org>

        * doc/rtl.texi: Document machine_mode wrapper classes.

2018-01-04  Richard Sandiford  <richard.sandiford@linaro.org>

        * fold-const.c (fold_ternary_loc): Check tree_fits_uhwi_p before
        using tree_to_uhwi.

2018-01-04  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-ssa-forwprop.c (is_combined_permutation_identity): Allow
        the VEC_PERM_EXPR fold to fail.

2018-01-04  Jakub Jelinek  <jakub@redhat.com>

        PR debug/83585
        * bb-reorder.c (insert_section_boundary_note): Set has_bb_partition
        to switched_sections.

2018-01-04  Richard Sandiford  <richard.sandiford@linaro.org>

        PR target/83680
        * config/arm/arm.c (arm_vectorize_vec_perm_const): Fix inverted
        test for d.testing.

2018-01-04  Peter Bergner  <bergner@vnet.ibm.com>

        PR target/83387
        * config/rs6000/rs6000.c (rs6000_discover_homogeneous_aggregate): Do not
        allow arguments in FP registers if TARGET_HARD_FLOAT is false.

2018-01-04  Jakub Jelinek  <jakub@redhat.com>

        PR debug/83666
        * cfgexpand.c (expand_debug_expr) <case BIT_FIELD_REF>: Punt if mode
        is BLKmode and bitpos not zero or mode change is needed.

2018-01-04  Richard Sandiford  <richard.sandiford@linaro.org>

        PR target/83675
        * config/sparc/sparc.c (sparc_vectorize_vec_perm_const): Require
        TARGET_VIS2.

2018-01-04  Uros Bizjak  <ubizjak@gmail.com>

        PR target/83628
        * config/alpha/alpha.md (*sadd<modesuffix>): Use ASHIFT
        instead of MULT rtx.  Update all corresponding splitters.
        (*saddl_se): Ditto.
        (*ssub<modesuffix>): Ditto.
        (*ssubl_se): Ditto.
        (*cmp_sadd_di): Update split patterns.
        (*cmp_sadd_si): Ditto.
        (*cmp_sadd_sidi): Ditto.
        (*cmp_ssub_di): Ditto.
        (*cmp_ssub_si): Ditto.
        (*cmp_ssub_sidi): Ditto.
        * config/alpha/predicates.md (const23_operand): New predicate.
        * config/alpha/alpha.c (alpha_rtx_costs) [PLUS, MINUS]:
        Look for ASHIFT, not MULT inner operand.
        (alpha_split_conditional_move): Update for *sadd<modesuffix> change.

2018-01-04  Martin Liska  <mliska@suse.cz>

        PR gcov-profile/83669
        * gcov.c (output_intermediate_file): Add version to intermediate
        gcov file.
        * doc/gcov.texi: Document new field 'version' in intermediate
        file format. Fix location of '-k' option of gcov command.

2018-01-04  Martin Liska  <mliska@suse.cz>

        PR ipa/82352
        * ipa-icf.c (sem_function::merge): Do not cross comdat boundary.

2018-01-04  Jakub Jelinek  <jakub@redhat.com>

        * gimple-ssa-sprintf.c (parse_directive): Cast second dir.len to uhwi.

2018-01-03  Martin Sebor  <msebor@redhat.com>

        PR tree-optimization/83655
        * gimple-ssa-warn-restrict.c (wrestrict_dom_walker::check_call): Avoid
        checking calls with invalid arguments.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-stmts.c (vect_get_store_rhs): New function.
        (vectorizable_mask_load_store): Delete.
        (vectorizable_call): Return false for masked loads and stores.
        (vectorizable_store): Handle IFN_MASK_STORE.  Use vect_get_store_rhs
        instead of gimple_assign_rhs1.
        (vectorizable_load): Handle IFN_MASK_LOAD.
        (vect_transform_stmt): Don't set is_store for call_vec_info_type.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-stmts.c (vect_build_gather_load_calls): New function,
        split out from..,
        (vectorizable_mask_load_store): ...here.
        (vectorizable_load): ...and here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-stmts.c (vect_build_all_ones_mask)
        (vect_build_zero_merge_argument): New functions, split out from...
        (vectorizable_load): ...here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-stmts.c (vect_check_store_rhs): New function,
        split out from...
        (vectorizable_mask_load_store): ...here.
        (vectorizable_store): ...and here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-stmts.c (vect_check_load_store_mask): New function,
        split out from...
        (vectorizable_mask_load_store): ...here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vectorizer.h (vec_load_store_type): Moved from tree-vec-stmts.c
        (vect_model_store_cost): Take a vec_load_store_type instead of a
        vect_def_type.
        * tree-vect-stmts.c (vec_load_store_type): Move to tree-vectorizer.h.
        (vect_model_store_cost): Take a vec_load_store_type instead of a
        vect_def_type.
        (vectorizable_mask_load_store): Update accordingly.
        (vectorizable_store): Likewise.
        * tree-vect-slp.c (vect_analyze_slp_cost_1): Update accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-loop.c (vect_transform_loop): Stub out scalar
        IFN_MASK_LOAD calls here rather than...
        * tree-vect-stmts.c (vectorizable_mask_load_store): ...here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expmed.c (extract_bit_field_1): For vector extracts,
        fall back to extract_bit_field_as_subreg if vec_extract
        isn't available.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * lra-spills.c (pseudo_reg_slot_compare): Sort slots by whether
        they are variable or constant sized.
        (assign_stack_slot_num_and_sort_pseudos): Don't reuse variable-sized
        slots for constant-sized data.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-patterns.c (vect_recog_mask_conversion_pattern): When
        handling COND_EXPRs with boolean comparisons, try to find a better
        basis for the mask type than the boolean itself.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * doc/rtl.texi (MAX_BITSIZE_MODE_ANY_MODE): Describe how the default
        is calculated and how it can be overridden.
        * genmodes.c (max_bitsize_mode_any_mode): New variable.
        (create_modes): Initialize it from MAX_BITSIZE_MODE_ANY_MODE,
        if defined.
        (emit_max_int): Use it to set the output MAX_BITSIZE_MODE_ANY_MODE,
        if nonzero.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/aarch64/aarch64-protos.h (aarch64_output_simd_mov_immediate):
        Remove the mode argument.
        (aarch64_simd_valid_immediate): Remove the mode and inverse
        arguments.
        * config/aarch64/iterators.md (bitsize): New iterator.
        * config/aarch64/aarch64-simd.md (*aarch64_simd_mov<mode>, and<mode>3)
        (ior<mode>3): Update calls to aarch64_output_simd_mov_immediate.
        * config/aarch64/constraints.md (Do, Db, Dn): Update calls to
        aarch64_simd_valid_immediate.
        * config/aarch64/predicates.md (aarch64_reg_or_orr_imm): Likewise.
        (aarch64_reg_or_bic_imm): Likewise.
        * config/aarch64/aarch64.c (simd_immediate_info): Replace mvn
        with an insn_type enum and msl with a modifier_type enum.
        Replace element_width with a scalar_mode.  Change the shift
        to unsigned int.  Add constructors for scalar_float_mode and
        scalar_int_mode elements.
        (aarch64_vect_float_const_representable_p): Delete.
        (aarch64_can_const_movi_rtx_p)
        (aarch64_simd_scalar_immediate_valid_for_move)
        (aarch64_simd_make_constant): Update call to
        aarch64_simd_valid_immediate.
        (aarch64_advsimd_valid_immediate_hs): New function.
        (aarch64_advsimd_valid_immediate): Likewise.
        (aarch64_simd_valid_immediate): Remove mode and inverse
        arguments.  Rewrite to use the above.  Use const_vec_duplicate_p
        to detect duplicated constants and use aarch64_float_const_zero_rtx_p
        and aarch64_float_const_representable_p on the result.
        (aarch64_output_simd_mov_immediate): Remove mode argument.
        Update call to aarch64_simd_valid_immediate and use of
        simd_immediate_info.
        (aarch64_output_scalar_simd_mov_immediate): Update call
        accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_precision): Prefix with CONST_MODE_PRECISION.
        (mode_nunits): Likewise CONST_MODE_NUNITS.
        * machmode.def (ADJUST_NUNITS): Document.
        * genmodes.c (mode_data::need_nunits_adj): New field.
        (blank_mode): Update accordingly.
        (adj_nunits): New variable.
        (print_maybe_const_decl): Replace CATEGORY with a NEEDS_ADJ
        parameter.
        (emit_mode_size_inline): Set need_bytesize_adj for all modes
        listed in adj_nunits.
        (emit_mode_nunits_inline): Set need_nunits_adj for all modes
        listed in adj_nunits.  Don't emit case statements for such modes.
        (emit_insn_modes_h): Emit definitions of CONST_MODE_NUNITS
        and CONST_MODE_PRECISION.  Make CONST_MODE_SIZE expand to
        nothing if adj_nunits is nonnull.
        (emit_mode_precision, emit_mode_nunits): Use print_maybe_const_decl.
        (emit_mode_unit_size, emit_mode_base_align, emit_mode_ibit)
        (emit_mode_fbit): Update use of print_maybe_const_decl.
        (emit_move_size): Likewise.  Treat the array as non-const
        if adj_nunits.
        (emit_mode_adjustments): Handle adj_nunits.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * machmode.def (VECTOR_MODES_WITH_PREFIX): Document.
        * genmodes.c (VECTOR_MODES_WITH_PREFIX): New macro.
        (VECTOR_MODES): Use it.
        (make_vector_modes): Take the prefix as an argument.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * mode-classes.def (MODE_VECTOR_BOOL): New mode class.
        * machmode.h (INTEGRAL_MODE_P, VECTOR_MODE_P): Return true
        for MODE_VECTOR_BOOL.
        * machmode.def (VECTOR_BOOL_MODE): Document.
        * genmodes.c (VECTOR_BOOL_MODE): New macro.
        (make_vector_bool_mode): New function.
        (complete_mode, emit_mode_wider, emit_mode_adjustments): Handle
        MODE_VECTOR_BOOL.
        * lto-streamer-in.c (lto_input_mode_table): Likewise.
        * rtx-vector-builder.c (rtx_vector_builder::find_cached_value):
        Likewise.
        * stor-layout.c (int_mode_for_mode): Likewise.
        * tree.c (build_vector_type_for_mode): Likewise.
        * varasm.c (output_constant_pool_2): Likewise.
        * emit-rtl.c (init_emit_once): Make sure that CONST1_RTX (BImode) and
        CONSTM1_RTX (BImode) are the same thing.  Initialize const_tiny_rtx
        for MODE_VECTOR_BOOL.
        * expr.c (expand_expr_real_1): Use VECTOR_MODE_P instead of a list
        of mode class checks.
        * tree-vect-generic.c (expand_vector_operation): Use VECTOR_MODE_P
        instead of a list of mode class checks.
        (expand_vector_scalar_condition): Likewise.
        (type_for_widest_vector_mode): Handle BImode as an inner mode.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_size): Change from unsigned short to
        poly_uint16_pod.
        (mode_to_bytes): Return a poly_uint16 rather than an unsigned short.
        (GET_MODE_SIZE): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is not polynomial.
        (fixed_size_mode::includes_p): Check for constant-sized modes.
        * genmodes.c (emit_mode_size_inline): Make mode_size_inline
        return a poly_uint16 rather than an unsigned short.
        (emit_mode_size): Change the type of mode_size from unsigned short
        to poly_uint16_pod.  Use ZERO_COEFFS for the initializer.
        (emit_mode_adjustments): Cope with polynomial vector sizes.
        * lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
        for GET_MODE_SIZE.
        * lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
        for GET_MODE_SIZE.
        * auto-inc-dec.c (try_merge): Treat GET_MODE_SIZE as polynomial.
        * builtins.c (expand_ifn_atomic_compare_exchange_into_call): Likewise.
        * caller-save.c (setup_save_areas): Likewise.
        (replace_reg_with_saved_mem): Likewise.
        * calls.c (emit_library_call_value_1): Likewise.
        * combine-stack-adj.c (combine_stack_adjustments_for_block): Likewise.
        * combine.c (simplify_set, make_extraction, simplify_shift_const_1)
        (gen_lowpart_for_combine): Likewise.
        * convert.c (convert_to_integer_1): Likewise.
        * cse.c (equiv_constant, cse_insn): Likewise.
        * cselib.c (autoinc_split, cselib_hash_rtx): Likewise.
        (cselib_subst_to_values): Likewise.
        * dce.c (word_dce_process_block): Likewise.
        * df-problems.c (df_word_lr_mark_ref): Likewise.
        * dwarf2cfi.c (init_one_dwarf_reg_size): Likewise.
        * dwarf2out.c (multiple_reg_loc_descriptor, mem_loc_descriptor)
        (concat_loc_descriptor, concatn_loc_descriptor, loc_descriptor)
        (rtl_for_decl_location): Likewise.
        * emit-rtl.c (gen_highpart, widen_memory_access): Likewise.
        * expmed.c (extract_bit_field_1, extract_integral_bit_field): Likewise.
        * expr.c (emit_group_load_1, clear_storage_hints): Likewise.
        (emit_move_complex, emit_move_multi_word, emit_push_insn): Likewise.
        (expand_expr_real_1): Likewise.
        * function.c (assign_parm_setup_block_p, assign_parm_setup_block)
        (pad_below): Likewise.
        * gimple-fold.c (optimize_atomic_compare_exchange_p): Likewise.
        * gimple-ssa-store-merging.c (rhs_valid_for_store_merging_p): Likewise.
        * ira.c (get_subreg_tracking_sizes): Likewise.
        * ira-build.c (ira_create_allocno_objects): Likewise.
        * ira-color.c (coalesced_pseudo_reg_slot_compare): Likewise.
        (ira_sort_regnos_for_alter_reg): Likewise.
        * ira-costs.c (record_operand_costs): Likewise.
        * lower-subreg.c (interesting_mode_p, simplify_gen_subreg_concatn)
        (resolve_simple_move): Likewise.
        * lra-constraints.c (get_reload_reg, operands_match_p): Likewise.
        (process_addr_reg, simplify_operand_subreg, curr_insn_transform)
        (lra_constraints): Likewise.
        (CONST_POOL_OK_P): Reject variable-sized modes.
        * lra-spills.c (slot, assign_mem_slot, pseudo_reg_slot_compare)
        (add_pseudo_to_slot, lra_spill): Likewise.
        * omp-low.c (omp_clause_aligned_alignment): Likewise.
        * optabs-query.c (get_best_extraction_insn): Likewise.
        * optabs-tree.c (expand_vec_cond_expr_p): Likewise.
        * optabs.c (expand_vec_perm_var, expand_vec_cond_expr): Likewise.
        (expand_mult_highpart, valid_multiword_target_p): Likewise.
        * recog.c (offsettable_address_addr_space_p): Likewise.
        * regcprop.c (maybe_mode_change): Likewise.
        * reginfo.c (choose_hard_reg_mode, record_subregs_of_mode): Likewise.
        * regrename.c (build_def_use): Likewise.
        * regstat.c (dump_reg_info): Likewise.
        * reload.c (complex_word_subreg_p, push_reload, find_dummy_reload)
        (find_reloads, find_reloads_subreg_address): Likewise.
        * reload1.c (eliminate_regs_1): Likewise.
        * rtlanal.c (for_each_inc_dec_find_inc_dec, rtx_cost): Likewise.
        * simplify-rtx.c (avoid_constant_pool_reference): Likewise.
        (simplify_binary_operation_1, simplify_subreg): Likewise.
        * targhooks.c (default_function_arg_padding): Likewise.
        (default_hard_regno_nregs, default_class_max_nregs): Likewise.
        * tree-cfg.c (verify_gimple_assign_binary): Likewise.
        (verify_gimple_assign_ternary): Likewise.
        * tree-inline.c (estimate_move_cost): Likewise.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        * tree-ssa-loop-ivopts.c (add_autoinc_candidates): Likewise.
        (get_address_cost_ainc): Likewise.
        * tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Likewise.
        (vect_supportable_dr_alignment): Likewise.
        * tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
        (vectorizable_reduction): Likewise.
        * tree-vect-stmts.c (vectorizable_assignment, vectorizable_shift)
        (vectorizable_operation, vectorizable_load): Likewise.
        * tree.c (build_same_sized_truth_vector_type): Likewise.
        * valtrack.c (cleanup_auto_inc_dec): Likewise.
        * var-tracking.c (emit_note_insn_var_location): Likewise.
        * config/arc/arc.h (ASM_OUTPUT_CASE_END): Use as_a <scalar_int_mode>.
        (ADDR_VEC_ALIGN): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_to_bits): Return a poly_uint16 rather than an
        unsigned short.
        (GET_MODE_BITSIZE): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is polynomial.
        * calls.c (shift_return_value): Treat GET_MODE_BITSIZE as polynomial.
        * combine.c (make_extraction): Likewise.
        * dse.c (find_shift_sequence): Likewise.
        * dwarf2out.c (mem_loc_descriptor): Likewise.
        * expmed.c (store_integral_bit_field, extract_bit_field_1): Likewise.
        (extract_bit_field, extract_low_bits): Likewise.
        * expr.c (convert_move, convert_modes, emit_move_insn_1): Likewise.
        (optimize_bitfield_assignment_op, expand_assignment): Likewise.
        (store_expr_with_bounds, store_field, expand_expr_real_1): Likewise.
        * fold-const.c (optimize_bit_field_compare, merge_ranges): Likewise.
        * gimple-fold.c (optimize_atomic_compare_exchange_p): Likewise.
        * reload.c (find_reloads): Likewise.
        * reload1.c (alter_reg): Likewise.
        * stor-layout.c (bitwise_mode_for_mode, compute_record_mode): Likewise.
        * targhooks.c (default_secondary_memory_needed_mode): Likewise.
        * tree-if-conv.c (predicate_mem_writes): Likewise.
        * tree-ssa-strlen.c (handle_builtin_memcmp): Likewise.
        * tree-vect-patterns.c (adjust_bool_pattern): Likewise.
        * tree-vect-stmts.c (vectorizable_simd_clone_call): Likewise.
        * valtrack.c (dead_debug_insert_temp): Likewise.
        * varasm.c (mergeable_constant_section): Likewise.
        * config/sh/sh.h (LOCAL_ALIGNMENT): Use as_a <fixed_size_mode>.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_assignment): Cope with polynomial mode sizes
        when assigning to a CONCAT.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_precision): Change from unsigned short to
        poly_uint16_pod.
        (mode_to_precision): Return a poly_uint16 rather than an unsigned
        short.
        (GET_MODE_PRECISION): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is not polynomial.
        (HWI_COMPUTABLE_MODE_P): Turn into a function.  Optimize the case
        in which the mode is already known to be a scalar_int_mode.
        * genmodes.c (emit_mode_precision): Change the type of mode_precision
        from unsigned short to poly_uint16_pod.  Use ZERO_COEFFS for the
        initializer.
        * lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
        for GET_MODE_PRECISION.
        * lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
        for GET_MODE_PRECISION.
        * combine.c (update_rsp_from_reg_equal): Treat GET_MODE_PRECISION
        as polynomial.
        (try_combine, find_split_point, combine_simplify_rtx): Likewise.
        (expand_field_assignment, make_extraction): Likewise.
        (make_compound_operation_int, record_dead_and_set_regs_1): Likewise.
        (get_last_value): Likewise.
        * convert.c (convert_to_integer_1): Likewise.
        * cse.c (cse_insn): Likewise.
        * expr.c (expand_expr_real_1): Likewise.
        * lra-constraints.c (simplify_operand_subreg): Likewise.
        * optabs-query.c (can_atomic_load_p): Likewise.
        * optabs.c (expand_atomic_load): Likewise.
        (expand_atomic_store): Likewise.
        * ree.c (combine_reaching_defs): Likewise.
        * rtl.h (partial_subreg_p, paradoxical_subreg_p): Likewise.
        * rtlanal.c (nonzero_bits1, lsb_bitfield_op_p): Likewise.
        * tree.h (type_has_mode_precision_p): Likewise.
        * ubsan.c (instrument_si_overflow): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree.h (TYPE_VECTOR_SUBPARTS): Turn into a function and handle
        polynomial numbers of units.
        (SET_TYPE_VECTOR_SUBPARTS): Likewise.
        (valid_vector_subparts_p): New function.
        (build_vector_type): Remove temporary shim and take the number
        of units as a poly_uint64 rather than an int.
        (build_opaque_vector_type): Take the number of units as a
        poly_uint64 rather than an int.
        * tree.c (build_vector_from_ctor): Handle polynomial
        TYPE_VECTOR_SUBPARTS.
        (type_hash_canon_hash, type_cache_hasher::equal): Likewise.
        (uniform_vector_p, vector_type_mode, build_vector): Likewise.
        (build_vector_from_val): If the number of units is variable,
        use build_vec_duplicate_cst for constant operands and
        VEC_DUPLICATE_EXPR otherwise.
        (make_vector_type): Remove temporary is_constant ().
        (build_vector_type, build_opaque_vector_type): Take the number of
        units as a poly_uint64 rather than an int.
        (check_vector_cst): Handle polynomial TYPE_VECTOR_SUBPARTS and
        VECTOR_CST_NELTS.
        * cfgexpand.c (expand_debug_expr): Likewise.
        * expr.c (count_type_elements, categorize_ctor_elements_1): Likewise.
        (store_constructor, expand_expr_real_1): Likewise.
        (const_scalar_mask_from_tree): Likewise.
        * fold-const-call.c (fold_const_reduction): Likewise.
        * fold-const.c (const_binop, const_unop, fold_convert_const): Likewise.
        (operand_equal_p, fold_vec_perm, fold_ternary_loc): Likewise.
        (native_encode_vector, vec_cst_ctor_to_array): Likewise.
        (fold_relational_const): Likewise.
        (native_interpret_vector): Likewise.  Change the size from an
        int to an unsigned int.
        * gimple-fold.c (gimple_fold_stmt_to_constant_1): Handle polynomial
        TYPE_VECTOR_SUBPARTS.
        (gimple_fold_indirect_ref, gimple_build_vector): Likewise.
        (gimple_build_vector_from_val): Use VEC_DUPLICATE_EXPR when
        duplicating a non-constant operand into a variable-length vector.
        * hsa-brig.c (hsa_op_immed::emit_to_buffer): Handle polynomial
        TYPE_VECTOR_SUBPARTS and VECTOR_CST_NELTS.
        * ipa-icf.c (sem_variable::equals): Likewise.
        * match.pd: Likewise.
        * omp-simd-clone.c (simd_clone_subparts): Likewise.
        * print-tree.c (print_node): Likewise.
        * stor-layout.c (layout_type): Likewise.
        * targhooks.c (default_builtin_vectorization_cost): Likewise.
        * tree-cfg.c (verify_gimple_comparison): Likewise.
        (verify_gimple_assign_binary): Likewise.
        (verify_gimple_assign_ternary): Likewise.
        (verify_gimple_assign_single): Likewise.
        * tree-pretty-print.c (dump_generic_node): Likewise.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        (simplify_bitfield_ref, is_combined_permutation_identity): Likewise.
        * tree-vect-data-refs.c (vect_permute_store_chain): Likewise.
        (vect_grouped_load_supported, vect_permute_load_chain): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        * tree-vect-generic.c (nunits_for_known_piecewise_op): Likewise.
        (expand_vector_condition, optimize_vector_constructor): Likewise.
        (lower_vec_perm, get_compute_type): Likewise.
        * tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
        (get_initial_defs_for_reduction, vect_transform_loop): Likewise.
        * tree-vect-patterns.c (vect_recog_bool_pattern): Likewise.
        (vect_recog_mask_conversion_pattern): Likewise.
        * tree-vect-slp.c (vect_supported_load_permutation_p): Likewise.
        (vect_get_constant_vectors, vect_transform_slp_perm_load): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (get_group_load_store_type, vectorizable_mask_load_store): Likewise.
        (vectorizable_bswap, simd_clone_subparts, vectorizable_assignment)
        (vectorizable_shift, vectorizable_operation, vectorizable_store)
        (vectorizable_load, vect_is_simple_cond, vectorizable_comparison)
        (supportable_widening_operation): Likewise.
        (supportable_narrowing_operation): Likewise.
        * tree-vector-builder.c (tree_vector_builder::binary_encoded_nelts):
        Likewise.
        * varasm.c (output_constant): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vect_permute_store_chain): Reorganize
        so that both the length == 3 and length != 3 cases set up their
        own permute vectors.  Add comments explaining why we know the
        number of elements is constant.
        (vect_permute_load_chain): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_nunits): Change from unsigned char to
        poly_uint16_pod.
        (ONLY_FIXED_SIZE_MODES): New macro.
        (pod_mode::measurement_type, scalar_int_mode::measurement_type)
        (scalar_float_mode::measurement_type, scalar_mode::measurement_type)
        (complex_mode::measurement_type, fixed_size_mode::measurement_type):
        New typedefs.
        (mode_to_nunits): Return a poly_uint16 rather than an unsigned short.
        (GET_MODE_NUNITS): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is not polynomial.
        * genmodes.c (ZERO_COEFFS): New macro.
        (emit_mode_nunits_inline): Make mode_nunits_inline return a
        poly_uint16.
        (emit_mode_nunits): Change the type of mode_nunits to poly_uint16_pod.
        Use ZERO_COEFFS when emitting initializers.
        * data-streamer.h (bp_pack_poly_value): New function.
        (bp_unpack_poly_value): Likewise.
        * lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
        for GET_MODE_NUNITS.
        * lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
        for GET_MODE_NUNITS.
        * tree.c (make_vector_type): Remove temporary shim and make
        the real function take the number of units as a poly_uint64
        rather than an int.
        (build_vector_type_for_mode): Handle polynomial nunits.
        * dwarf2out.c (loc_descriptor, add_const_value_attribute): Likewise.
        * emit-rtl.c (const_vec_series_p_1): Likewise.
        (gen_rtx_CONST_VECTOR): Likewise.
        * fold-const.c (test_vec_duplicate_folding): Likewise.
        * genrecog.c (validate_pattern): Likewise.
        * optabs-query.c (can_vec_perm_var_p, can_mult_highpart_p): Likewise.
        * optabs-tree.c (expand_vec_cond_expr_p): Likewise.
        * optabs.c (expand_vector_broadcast, expand_binop_directly): Likewise.
        (shift_amt_for_vec_perm_mask, expand_vec_perm_var): Likewise.
        (expand_vec_cond_expr, expand_mult_highpart): Likewise.
        * rtlanal.c (subreg_get_info): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
        (vect_grouped_load_supported): Likewise.
        * tree-vect-generic.c (type_for_widest_vector_mode): Likewise.
        * tree-vect-loop.c (have_whole_vector_shift): Likewise.
        * simplify-rtx.c (simplify_unary_operation_1): Likewise.
        (simplify_const_unary_operation, simplify_binary_operation_1)
        (simplify_const_binary_operation, simplify_ternary_operation)
        (test_vector_ops_duplicate, test_vector_ops): Likewise.
        (simplify_immed_subreg): Use GET_MODE_NUNITS on a fixed_size_mode
        instead of CONST_VECTOR_NUNITS.
        * varasm.c (output_constant_pool_2): Likewise.
        * rtx-vector-builder.c (rtx_vector_builder::build): Only include the
        explicit-encoded elements in the XVEC for variable-length vectors.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * lra-constraints.c (curr_insn_transform): Use partial_subreg_p.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * coretypes.h (fixed_size_mode): Declare.
        (fixed_size_mode_pod): New typedef.
        * builtins.h (target_builtins::x_apply_args_mode)
        (target_builtins::x_apply_result_mode): Change type to
        fixed_size_mode_pod.
        * builtins.c (apply_args_size, apply_result_size, result_vector)
        (expand_builtin_apply_args_1, expand_builtin_apply)
        (expand_builtin_return): Update accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * cse.c (hash_rtx_cb): Hash only the encoded elements.
        * cselib.c (cselib_hash_rtx): Likewise.
        * expmed.c (make_tree): Build VECTOR_CSTs directly from the
        CONST_VECTOR encoding.

2017-01-03  Jakub Jelinek  <jakub@redhat.com>
            Jeff Law  <law@redhat.com>

        PR target/83641
        * config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): For
        noreturn probe, use gen_pop instead of ix86_emit_restore_reg_using_pop,
        only set RTX_FRAME_RELATED_P on both the push and pop if cfa_reg is sp
        and add REG_CFA_ADJUST_CFA notes in that case to both insns.

        PR target/83641
        * config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): Do not
        explicitly probe *sp in a noreturn function if there were any callee
        register saves or frame pointer is needed.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        PR debug/83621
        * cfgexpand.c (expand_debug_expr): Return NULL if mode is
        BLKmode for ternary, binary or unary expressions.

        PR debug/83645
        * var-tracking.c (delete_vta_debug_insn): New inline function.
        (delete_vta_debug_insns): Add USE_CFG argument, if true, walk just
        insns from get_insns () to NULL instead of each bb separately.
        Use delete_vta_debug_insn.  No longer static.
        (vt_debug_insns_local, variable_tracking_main_1): Adjust
        delete_vta_debug_insns callers.
        * rtl.h (delete_vta_debug_insns): Declare.
        * final.c (rest_of_handle_final): Call delete_vta_debug_insns
        instead of variable_tracking_main.

2018-01-03  Martin Sebor  <msebor@redhat.com>

        PR tree-optimization/83603
        * calls.c (maybe_warn_nonstring_arg): Avoid accessing function
        arguments past the endof the argument list in functions declared
        without a prototype.
        * gimple-ssa-warn-restrict.c (wrestrict_dom_walker::check_call):
        Avoid checking when arguments are null.

2018-01-03  Martin Sebor  <msebor@redhat.com>

        PR c/83559
        * doc/extend.texi (attribute const): Fix a typo.
        * ipa-pure-const.c ((warn_function_const, warn_function_pure): Avoid
        issuing -Wsuggest-attribute for void functions.

2018-01-03  Martin Sebor  <msebor@redhat.com>

        * gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Use
        offset_int::from instead of wide_int::to_shwi.
        (maybe_diag_overlap): Remove assertion.
        Use HOST_WIDE_INT_PRINT_DEC instead of %lli.
        * gimple-ssa-sprintf.c (format_directive): Same.
        (parse_directive): Same.
        (sprintf_dom_walker::compute_format_length): Same.
        (try_substitute_return_value): Same.

2017-01-03  Jeff Law  <law@redhat.com>

        PR middle-end/83654
        * explow.c (anti_adjust_stack_and_probe_stack_clash): Test a
        non-constant residual for zero at runtime and avoid probing in
        that case.  Reorganize code for trailing problem to mirror handling
        of the residual.

2018-01-03  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

        PR tree-optimization/83501
        * tree-ssa-strlen.c (get_string_cst): New.
        (handle_char_store): Call get_string_cst.

2018-01-03  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/83593
        * tree-ssa-strlen.c: Include tree-cfg.h.
        (strlen_check_and_optimize_stmt): Add new argument cleanup_eh.
        (strlen_dom_walker): Add new member variable m_cleanup_cfg.
        (strlen_dom_walker::strlen_dom_walker): Initialize m_cleanup_cfg
        to false.
        (strlen_dom_walker::before_dom_children): Call
        gimple_purge_dead_eh_edges. Dump tranformation with details
        dump flags.
        (strlen_dom_walker::before_dom_children): Update call by adding
        new argument cleanup_eh.
        (pass_strlen::execute): Return TODO_cleanup_cfg if needed.

2018-01-03  Martin Liska  <mliska@suse.cz>

        PR ipa/83549
        * cif-code.def (VARIADIC_THUNK): New enum value.
        * ipa-fnsummary.c (compute_fn_summary): Do not inline variadic
        thunks.

2018-01-03  Jan Beulich  <jbeulich@suse.com>

        * sse.md (mov<mode>_internal): Tighten condition for when to use
        vmovdqu<ssescalarsize> for TI and OI modes.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        Update copyright years.

2018-01-03  Martin Liska  <mliska@suse.cz>

        PR ipa/83594
        * ipa-visibility.c (function_and_variable_visibility): Skip
        functions with noipa attribure.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        * gcc.c (process_command): Update copyright notice dates.
        * gcov-dump.c (print_version): Ditto.
        * gcov.c (print_version): Ditto.
        * gcov-tool.c (print_version): Ditto.
        * gengtype.c (create_file): Ditto.
        * doc/cpp.texi: Bump @copying's copyright year.
        * doc/cppinternals.texi: Ditto.
        * doc/gcc.texi: Ditto.
        * doc/gccint.texi: Ditto.
        * doc/gcov.texi: Ditto.
        * doc/install.texi: Ditto.
        * doc/invoke.texi: Ditto.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * vector-builder.h (vector_builder::m_full_nelts): Change from
        unsigned int to poly_uint64.
        (vector_builder::full_nelts): Update prototype accordingly.
        (vector_builder::new_vector): Likewise.
        (vector_builder::encoded_full_vector_p): Handle polynomial full_nelts.
        (vector_builder::operator ==): Likewise.
        (vector_builder::finalize): Likewise.
        * int-vector-builder.h (int_vector_builder::int_vector_builder):
        Take the number of elements as a poly_uint64 rather than an
        unsigned int.
        * vec-perm-indices.h (vec_perm_indices::m_nelts_per_input): Change
        from unsigned int to poly_uint64.
        (vec_perm_indices::vec_perm_indices): Update prototype accordingly.
        (vec_perm_indices::new_vector): Likewise.
        (vec_perm_indices::length): Likewise.
        (vec_perm_indices::nelts_per_input): Likewise.
        (vec_perm_indices::input_nelts): Likewise.
        * vec-perm-indices.c (vec_perm_indices::new_vector): Take the
        number of elements per input as a poly_uint64 rather than an
        unsigned int.  Use the original encoding for variable-length
        vectors, rather than clamping each individual element.
        For the second and subsequent elements in each pattern,
        clamp the step and base before clamping their sum.
        (vec_perm_indices::series_p): Handle polynomial element counts.
        (vec_perm_indices::all_in_range_p): Likewise.
        (vec_perm_indices_to_tree): Likewise.
        (vec_perm_indices_to_rtx): Likewise.
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Likewise.
        * tree-vector-builder.c (tree_vector_builder::new_unary_operation)
        (tree_vector_builder::new_binary_operation): Handle polynomial
        element counts.  Return false if we need to know the number
        of elements at compile time.
        * fold-const.c (fold_vec_perm): Punt if the number of elements
        isn't known at compile time.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * vec-perm-indices.h (vec_perm_builder): Change element type
        from HOST_WIDE_INT to poly_int64.
        (vec_perm_indices::element_type): Update accordingly.
        (vec_perm_indices::clamp): Handle polynomial element_types.
        * vec-perm-indices.c (vec_perm_indices::series_p): Likewise.
        (vec_perm_indices::all_in_range_p): Likewise.
        (tree_to_vec_perm_builder): Check for poly_int64 trees rather
        than shwi trees.
        * vector-builder.h (vector_builder::stepped_sequence_p): Handle
        polynomial vec_perm_indices element types.
        * int-vector-builder.h (int_vector_builder::equal_p): Likewise.
        * fold-const.c (fold_vec_perm): Likewise.
        * optabs.c (shift_amt_for_vec_perm_mask): Likewise.
        * tree-vect-generic.c (lower_vec_perm): Likewise.
        * tree-vect-slp.c (vect_transform_slp_perm_load): Likewise.
        * config/aarch64/aarch64.c (aarch64_evpc_tbl): Cast d->perm
        element type to HOST_WIDE_INT.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * alias.c (addr_side_effect_eval): Take the size as a poly_int64
        rather than an int.  Use plus_constant.
        (memrefs_conflict_p): Take the sizes as poly_int64s rather than ints.
        Take the offset "c" as a poly_int64 rather than a HOST_WIDE_INT.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * calls.c (emit_call_1, expand_call): Change struct_value_size from
        a HOST_WIDE_INT to a poly_int64.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * calls.c (load_register_parameters): Cope with polynomial
        mode sizes.  Require a constant size for BLKmode parameters
        that aren't described by a PARALLEL.  If BLOCK_REG_PADDING
        forces a parameter to be padded at the lsb end in order to
        fill a complete number of words, require the parameter size
        to be ordered wrt UNITS_PER_WORD.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * reload1.c (spill_stack_slot_width): Change element type
        from unsigned int to poly_uint64_pod.
        (alter_reg): Treat mode sizes as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * reload.c (complex_word_subreg_p): New function.
        (reload_inner_reg_of_subreg, push_reload): Use it.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * lra-constraints.c (process_alt_operands): Reject matched
        operands whose sizes aren't ordered.
        (match_reload): Refer to this check here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * builtins.c (expand_ifn_atomic_compare_exchange_into_call): Assert
        that the mode size is in the set {1, 2, 4, 8, 16}.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * var-tracking.c (adjust_mems): Treat mode sizes as polynomial.
        Use plus_constant instead of gen_rtx_PLUS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/cr16/cr16-protos.h (cr16_push_rounding): Declare.
        * config/cr16/cr16.h (PUSH_ROUNDING): Move implementation to...
        * config/cr16/cr16.c (cr16_push_rounding): ...this new function.
        * config/h8300/h8300-protos.h (h8300_push_rounding): Declare.
        * config/h8300/h8300.h (PUSH_ROUNDING): Move implementation to...
        * config/h8300/h8300.c (h8300_push_rounding): ...this new function.
        * config/i386/i386-protos.h (ix86_push_rounding): Declare.
        * config/i386/i386.h (PUSH_ROUNDING): Move implementation to...
        * config/i386/i386.c (ix86_push_rounding): ...this new function.
        * config/m32c/m32c-protos.h (m32c_push_rounding): Take and return
        a poly_int64.
        * config/m32c/m32c.c (m32c_push_rounding): Likewise.
        * config/m68k/m68k-protos.h (m68k_push_rounding): Declare.
        * config/m68k/m68k.h (PUSH_ROUNDING): Move implementation to...
        * config/m68k/m68k.c (m68k_push_rounding): ...this new function.
        * config/pdp11/pdp11-protos.h (pdp11_push_rounding): Declare.
        * config/pdp11/pdp11.h (PUSH_ROUNDING): Move implementation to...
        * config/pdp11/pdp11.c (pdp11_push_rounding): ...this new function.
        * config/stormy16/stormy16-protos.h (xstormy16_push_rounding): Declare.
        * config/stormy16/stormy16.h (PUSH_ROUNDING): Move implementation to...
        * config/stormy16/stormy16.c (xstormy16_push_rounding): ...this new
        function.
        * expr.c (emit_move_resolve_push): Treat the input and result
        of PUSH_ROUNDING as a poly_int64.
        (emit_move_complex_push, emit_single_push_insn_1): Likewise.
        (emit_push_insn): Likewise.
        * lra-eliminations.c (mark_not_eliminable): Likewise.
        * recog.c (push_operand): Likewise.
        * reload1.c (elimination_effects): Likewise.
        * rtlanal.c (nonzero_bits1): Likewise.
        * calls.c (store_one_arg): Likewise.  Require the padding to be
        known at compile time.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (emit_single_push_insn_1): Treat mode sizes as polynomial.
        Use plus_constant instead of gen_rtx_PLUS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * auto-inc-dec.c (set_inc_state): Take the mode size as a poly_int64
        rather than an int.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_expr_real_1): Use tree_to_poly_uint64
        instead of int_size_in_bytes when handling VIEW_CONVERT_EXPRs
        via stack temporaries.  Treat the mode size as polynomial too.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_expr_real_2): When handling conversions involving
        unions, apply tree_to_poly_uint64 to the TYPE_SIZE rather than
        multiplying int_size_in_bytes by BITS_PER_UNIT.  Treat GET_MODE_BISIZE
        as a poly_uint64 too.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * rtlanal.c (subreg_get_info): Handle polynomial mode sizes.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * combine.c (can_change_dest_mode): Handle polynomial
        REGMODE_NATURAL_SIZE.
        * expmed.c (store_bit_field_1): Likewise.
        * expr.c (store_constructor): Likewise.
        * emit-rtl.c (validate_subreg): Operate on polynomial mode sizes
        and polynomial REGMODE_NATURAL_SIZE.
        (gen_lowpart_common): Likewise.
        * reginfo.c (record_subregs_of_mode): Likewise.
        * rtlanal.c (read_modify_subreg_p): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * internal-fn.c (expand_vector_ubsan_overflow): Handle polynomial
        numbers of elements.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * match.pd: Cope with polynomial numbers of vector elements.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * fold-const.c (fold_indirect_ref_1): Handle polynomial offsets
        in a POINTER_PLUS_EXPR.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * omp-simd-clone.c (simd_clone_subparts): New function.
        (simd_clone_init_simd_arrays): Use it instead of TYPE_VECTOR_SUBPARTS.
        (ipa_simd_modify_function_body): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-generic.c (nunits_for_known_piecewise_op): New function.
        (expand_vector_piecewise): Use it instead of TYPE_VECTOR_SUBPARTS.
        (expand_vector_addition, add_rshift, expand_vector_divmod): Likewise.
        (expand_vector_condition, vector_element): Likewise.
        (subparts_gt): New function.
        (get_compute_type): Use subparts_gt.
        (count_type_subparts): Delete.
        (expand_vector_operations_1): Use subparts_gt instead of
        count_type_subparts.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vect_no_alias_p): Replace with...
        (vect_compile_time_alias): ...this new function.  Do the calculation
        on poly_ints rather than trees.
        (vect_prune_runtime_alias_test_list): Update call accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c (vect_build_slp_tree_1): Handle polynomial
        numbers of units.
        (vect_schedule_slp_instance): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c (vect_get_and_check_slp_defs): Reject
        constant and extern definitions for variable-length vectors.
        (vect_get_constant_vectors): Note that the number of units
        is known to be constant.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (vectorizable_conversion): Treat the number
        of units as polynomial.  Choose between WIDE and NARROW based
        on multiple_p.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (simd_clone_subparts): New function.
        (vectorizable_simd_clone_call): Use it instead of TYPE_VECTOR_SUBPARTS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (vectorizable_call): Treat the number of
        vectors as polynomial.  Use build_index_vector for
        IFN_GOMP_SIMD_LANE.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (get_load_store_type): Treat the number of
        units as polynomial.  Reject VMAT_ELEMENTWISE and VMAT_STRIDED_SLP
        for variable-length vectors.
        (vectorizable_mask_load_store): Treat the number of units as
        polynomial, asserting that it is constant if the condition has
        already been enforced.
        (vectorizable_store, vectorizable_load): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-loop.c (vectorizable_live_operation): Treat the number
        of units as polynomial.  Punt if we can't tell at compile time
        which vector contains the final result.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-loop.c (vectorizable_induction): Treat the number
        of units as polynomial.  Punt on SLP inductions.  Use an integer
        VEC_SERIES_EXPR for variable-length integer reductions.  Use a
        cast of such a series for variable-length floating-point
        reductions.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree.h (build_index_vector): Declare.
        * tree.c (build_index_vector): New function.
        * tree-vect-loop.c (get_initial_defs_for_reduction): Treat the number
        of units as polynomial, forcibly converting it to a constant if
        vectorizable_reduction has already enforced the condition.
        (vect_create_epilog_for_reduction): Likewise.  Use build_index_vector
        to create a {1,2,3,...} vector.
        (vectorizable_reduction): Treat the number of units as polynomial.
        Choose vectype_in based on the largest scalar element size rather
        than the smallest number of units.  Enforce the restrictions
        relied on above.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vector_alignment_reachable_p): Treat the
        number of units as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.h (vector_sizes, auto_vector_sizes): New typedefs.
        * target.def (autovectorize_vector_sizes): Return the vector sizes
        by pointer, using vector_sizes rather than a bitmask.
        * targhooks.h (default_autovectorize_vector_sizes): Update accordingly.
        * targhooks.c (default_autovectorize_vector_sizes): Likewise.
        * config/aarch64/aarch64.c (aarch64_autovectorize_vector_sizes):
        Likewise.
        * config/arc/arc.c (arc_autovectorize_vector_sizes): Likewise.
        * config/arm/arm.c (arm_autovectorize_vector_sizes): Likewise.
        * config/i386/i386.c (ix86_autovectorize_vector_sizes): Likewise.
        * config/mips/mips.c (mips_autovectorize_vector_sizes): Likewise.
        * omp-general.c (omp_max_vf): Likewise.
        * omp-low.c (omp_clause_aligned_alignment): Likewise.
        * optabs-query.c (can_vec_mask_load_store_p): Likewise.
        * tree-vect-loop.c (vect_analyze_loop): Likewise.
        * tree-vect-slp.c (vect_slp_bb): Likewise.
        * doc/tm.texi: Regenerate.
        * tree-vectorizer.h (current_vector_size): Change from an unsigned int
        to a poly_uint64.
        * tree-vect-stmts.c (get_vectype_for_scalar_type_and_size): Take
        the vector size as a poly_uint64 rather than an unsigned int.
        (current_vector_size): Change from an unsigned int to a poly_uint64.
        (get_vectype_for_scalar_type): Update accordingly.
        * tree.h (build_truth_vector_type): Take the size and number of
        units as a poly_uint64 rather than an unsigned int.
        (build_vector_type): Add a temporary overload that takes
        the number of units as a poly_uint64 rather than an unsigned int.
        * tree.c (make_vector_type): Likewise.
        (build_truth_vector_type): Take the number of units as a poly_uint64
        rather than an unsigned int.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.def (get_mask_mode): Take the number of units and length
        as poly_uint64s rather than unsigned ints.
        * targhooks.h (default_get_mask_mode): Update accordingly.
        * targhooks.c (default_get_mask_mode): Likewise.
        * config/i386/i386.c (ix86_get_mask_mode): Likewise.
        * doc/tm.texi: Regenerate.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * omp-general.h (omp_max_vf): Return a poly_uint64 instead of an int.
        * omp-general.c (omp_max_vf): Likewise.
        * omp-expand.c (omp_adjust_chunk_size): Update call to omp_max_vf.
        (expand_omp_simd): Handle polynomial safelen.
        * omp-low.c (omplow_simd_context): Add a default constructor.
        (omplow_simd_context::max_vf): Change from int to poly_uint64.
        (lower_rec_simd_input_clauses): Update accordingly.
        (lower_rec_input_clauses): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (vect_nunits_for_cost): New function.
        * tree-vect-loop.c (vect_model_reduction_cost): Use it.
        * tree-vect-slp.c (vect_analyze_slp_cost_1): Likewise.
        (vect_analyze_slp_cost): Likewise.
        * tree-vect-stmts.c (vect_model_store_cost): Likewise.
        (vect_model_load_cost): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c (vect_record_max_nunits, vect_build_slp_tree_1)
        (vect_build_slp_tree_2, vect_build_slp_tree): Change max_nunits
        from an unsigned int * to a poly_uint64_pod *.
        (calculate_unrolling_factor): New function.
        (vect_analyze_slp_instance): Use it.  Track polynomial max_nunits.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (_slp_instance::unrolling_factor): Change
        from an unsigned int to a poly_uint64.
        (_loop_vec_info::slp_unrolling_factor): Likewise.
        (_loop_vec_info::vectorization_factor): Change from an int
        to a poly_uint64.
        (MAX_VECTORIZATION_FACTOR): Bump from 64 to INT_MAX.
        (vect_get_num_vectors): New function.
        (vect_update_max_nunits, vect_vf_for_cost): Likewise.
        (vect_get_num_copies): Use vect_get_num_vectors.
        (vect_analyze_data_ref_dependences): Change max_vf from an int *
        to an unsigned int *.
        (vect_analyze_data_refs): Change min_vf from an int * to a
        poly_uint64 *.
        (vect_transform_slp_perm_load): Take the vf as a poly_uint64 rather
        than an unsigned HOST_WIDE_INT.
        * tree-vect-data-refs.c (vect_analyze_possibly_independent_ddr)
        (vect_analyze_data_ref_dependence): Change max_vf from an int *
        to an unsigned int *.
        (vect_analyze_data_ref_dependences): Likewise.
        (vect_compute_data_ref_alignment): Handle polynomial vf.
        (vect_enhance_data_refs_alignment): Likewise.
        (vect_prune_runtime_alias_test_list): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        (vect_supportable_dr_alignment): Likewise.
        (dependence_distance_ge_vf): Take the vectorization factor as a
        poly_uint64 rather than an unsigned HOST_WIDE_INT.
        (vect_analyze_data_refs): Change min_vf from an int * to a
        poly_uint64 *.
        * tree-vect-loop-manip.c (vect_gen_scalar_loop_niters): Take
        vfm1 as a poly_uint64 rather than an int.  Make the same change
        for the returned bound_scalar.
        (vect_gen_vector_loop_niters): Handle polynomial vf.
        (vect_do_peeling): Likewise.  Update call to
        vect_gen_scalar_loop_niters and handle polynomial bound_scalars.
        (vect_gen_vector_loop_niters_mult_vf): Assert that the vf must
        be constant.
        * tree-vect-loop.c (vect_determine_vectorization_factor)
        (vect_update_vf_for_slp, vect_analyze_loop_2): Handle polynomial vf.
        (vect_get_known_peeling_cost): Likewise.
        (vect_estimate_min_profitable_iters, vectorizable_reduction): Likewise.
        (vect_worthwhile_without_simd_p, vectorizable_induction): Likewise.
        (vect_transform_loop): Likewise.  Use the lowest possible VF when
        updating the upper bounds of the loop.
        (vect_min_worthwhile_factor): Make static.  Return an unsigned int
        rather than an int.
        * tree-vect-slp.c (vect_attempt_slp_rearrange_stmts): Cope with
        polynomial unroll factors.
        (vect_analyze_slp_cost_1, vect_analyze_slp_instance): Likewise.
        (vect_make_slp_decision): Likewise.
        (vect_supported_load_permutation_p): Likewise, and polynomial
        vf too.
        (vect_analyze_slp_cost): Handle polynomial vf.
        (vect_slp_analyze_node_operations): Likewise.
        (vect_slp_analyze_bb_1): Likewise.
        (vect_transform_slp_perm_load): Take the vf as a poly_uint64 rather
        than an unsigned HOST_WIDE_INT.
        * tree-vect-stmts.c (vectorizable_simd_clone_call, vectorizable_store)
        (vectorizable_load): Handle polynomial vf.
        * tree-vectorizer.c (simduid_to_vf::vf): Change from an int to
        a poly_uint64.
        (adjust_simduid_builtins, shrink_simd_arrays): Update accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * match.pd: Handle bit operations involving three constants
        and try to fold one pair.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-loop-manip.c: Include gimple-fold.h.
        (slpeel_make_loop_iterate_ntimes): Add step, final_iv and
        niters_maybe_zero parameters.  Handle other cases besides a step of 1.
        (vect_gen_vector_loop_niters): Add a step_vector_ptr parameter.
        Add a path that uses a step of VF instead of 1, but disable it
        for now.
        (vect_do_peeling): Add step_vector, niters_vector_mult_vf_var
        and niters_no_overflow parameters.  Update calls to
        slpeel_make_loop_iterate_ntimes and vect_gen_vector_loop_niters.
        Create a new SSA name if the latter choses to use a ste other
        than zero, and return it via niters_vector_mult_vf_var.
        * tree-vect-loop.c (vect_transform_loop): Update calls to
        vect_do_peeling, vect_gen_vector_loop_niters and
        slpeel_make_loop_iterate_ntimes.
        * tree-vectorizer.h (slpeel_make_loop_iterate_ntimes, vect_do_peeling)
        (vect_gen_vector_loop_niters): Update declarations after above changes.

2018-01-02  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * config/rs6000/rs6000.md (floor<mode>2): Add support for IEEE
        128-bit round to integer instructions.
        (ceil<mode>2): Likewise.
        (btrunc<mode>2): Likewise.
        (round<mode>2): Likewise.

2018-01-02  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * config/rs6000/rs6000-string.c (expand_block_move): Allow the use of
        unaligned VSX load/store on P8/P9.
        (expand_block_clear): Allow the use of unaligned VSX
        load/store on P8/P9.

2018-01-02  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        * config/rs6000/rs6000-p8swap.c (swap_feeds_both_load_and_store):
        New function.
        (rs6000_analyze_swaps): Mark a web unoptimizable if it contains a
        swap associated with both a load and a store.

2018-01-02  Andrew Waterman  <andrew@sifive.com>

        * config/riscv/linux.h (ICACHE_FLUSH_FUNC): New.
        * config/riscv/riscv.md (clear_cache): Use it.

2018-01-02  Artyom Skrobov  <tyomitch@gmail.com>

        * web.c: Remove out-of-date comment.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * expr.c (fixup_args_size_notes): Check that any existing
        REG_ARGS_SIZE notes are correct, and don't try to re-add them.
        (emit_single_push_insn_1): Move stack_pointer_delta adjustment to...
        (emit_single_push_insn): ...here.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * rtl.h (CONST_VECTOR_ELT): Redefine to const_vector_elt.
        (const_vector_encoded_nelts): New function.
        (CONST_VECTOR_NUNITS): Redefine to use GET_MODE_NUNITS.
        (const_vector_int_elt, const_vector_elt): Declare.
        * emit-rtl.c (const_vector_int_elt_1): New function.
        (const_vector_elt): Likewise.
        * simplify-rtx.c (simplify_immed_subreg): Avoid taking the address
        of CONST_VECTOR_ELT.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * expr.c: Include rtx-vector-builder.h.
        (const_vector_mask_from_tree): Use rtx_vector_builder and operate
        directly on the tree encoding.
        (const_vector_from_tree): Likewise.
        * optabs.c: Include rtx-vector-builder.h.
        (expand_vec_perm_var): Use rtx_vector_builder and create a repeating
        sequence of "u" values.
        * vec-perm-indices.c: Include rtx-vector-builder.h.
        (vec_perm_indices_to_rtx): Use rtx_vector_builder and operate
        directly on the vec_perm_indices encoding.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * doc/rtl.texi (const_vector): Describe new encoding scheme.
        * Makefile.in (OBJS): Add rtx-vector-builder.o.
        * rtx-vector-builder.h: New file.
        * rtx-vector-builder.c: Likewise.
        * rtl.h (rtx_def::u2): Add a const_vector field.
        (CONST_VECTOR_NPATTERNS): New macro.
        (CONST_VECTOR_NELTS_PER_PATTERN): Likewise.
        (CONST_VECTOR_DUPLICATE_P): Likewise.
        (CONST_VECTOR_STEPPED_P): Likewise.
        (CONST_VECTOR_ENCODED_ELT): Likewise.
        (const_vec_duplicate_p): Check for a duplicated vector encoding.
        (unwrap_const_vec_duplicate): Likewise.
        (const_vec_series_p): Check for a non-duplicated vector encoding.
        Say that the function only returns true for integer vectors.
        * emit-rtl.c: Include rtx-vector-builder.h.
        (gen_const_vec_duplicate_1): Delete.
        (gen_const_vector): Call gen_const_vec_duplicate instead of
        gen_const_vec_duplicate_1.
        (const_vec_series_p_1): Operate directly on the CONST_VECTOR encoding.
        (gen_const_vec_duplicate): Use rtx_vector_builder.
        (gen_const_vec_series): Likewise.
        (gen_rtx_CONST_VECTOR): Likewise.
        * config/powerpcspe/powerpcspe.c: Include rtx-vector-builder.h.
        (swap_const_vector_halves): Take an rtx pointer rather than rtx.
        Build a new vector rather than modifying a CONST_VECTOR in-place.
        (handle_special_swappables): Update call accordingly.
        * config/rs6000/rs6000-p8swap.c: Include rtx-vector-builder.h.
        (swap_const_vector_halves): Take an rtx pointer rather than rtx.
        Build a new vector rather than modifying a CONST_VECTOR in-place.
        (handle_special_swappables): Update call accordingly.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * simplify-rtx.c (simplify_const_binary_operation): Use
        CONST_VECTOR_ELT instead of XVECEXP.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-cfg.c (verify_gimple_assign_ternary): Allow the size of
        the selector elements to be different from the data elements
        if the selector is a VECTOR_CST.
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Use a vector of
        ssizetype for the selector.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs.c (shift_amt_for_vec_perm_mask): Try using series_p
        before testing each element individually.
        * tree-vect-generic.c (lower_vec_perm): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * selftest.h (selftest::vec_perm_indices_c_tests): Declare.
        * selftest-run-tests.c (selftest::run_tests): Call it.
        * vector-builder.h (vector_builder::operator ==): New function.
        (vector_builder::operator !=): Likewise.
        * vec-perm-indices.h (vec_perm_indices::series_p): Declare.
        (vec_perm_indices::all_from_input_p): New function.
        * vec-perm-indices.c (vec_perm_indices::series_p): Likewise.
        (test_vec_perm_12, selftest::vec_perm_indices_c_tests): Likewise.
        * fold-const.c (fold_ternary_loc): Use tree_to_vec_perm_builder
        instead of reading the VECTOR_CST directly.  Detect whether both
        vector inputs are the same before constructing the vec_perm_indices,
        and update the number of inputs argument accordingly.  Use the
        utility functions added above.  Only construct sel2 if we need to.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs.c (expand_vec_perm_var): Use an explicit encoding for
        the broadcast of the low byte.
        (expand_mult_highpart): Use an explicit encoding for the permutes.
        * optabs-query.c (can_mult_highpart_p): Likewise.
        * tree-vect-loop.c (calc_vec_perm_mask_for_shift): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (vectorizable_bswap): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Use an
        explicit encoding for the power-of-2 permutes.
        (vect_permute_store_chain): Likewise.
        (vect_grouped_load_supported): Likewise.
        (vect_permute_load_chain): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * vec-perm-indices.h (vec_perm_indices_to_tree): Declare.
        * vec-perm-indices.c (vec_perm_indices_to_tree): New function.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Use it.
        * tree-vect-slp.c (vect_transform_slp_perm_load): Likewise.
        * tree-vect-stmts.c (vectorizable_bswap): Likewise.
        (vect_gen_perm_mask_any): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * int-vector-builder.h: New file.
        * vec-perm-indices.h: Include int-vector-builder.h.
        (vec_perm_indices): Redefine as an int_vector_builder.
        (auto_vec_perm_indices): Delete.
        (vec_perm_builder): Redefine as a stand-alone class.
        (vec_perm_indices::vec_perm_indices): New function.
        (vec_perm_indices::clamp): Likewise.
        * vec-perm-indices.c: Include fold-const.h and tree-vector-builder.h.
        (vec_perm_indices::new_vector): New function.
        (vec_perm_indices::new_expanded_vector): Update for new
        vec_perm_indices class.
        (vec_perm_indices::rotate_inputs): New function.
        (vec_perm_indices::all_in_range_p): Operate directly on the
        encoded form, without computing elided elements.
        (tree_to_vec_perm_builder): Operate directly on the VECTOR_CST
        encoding.  Update for new vec_perm_indices class.
        * optabs.c (expand_vec_perm_const): Create a vec_perm_indices for
        the given vec_perm_builder.
        (expand_vec_perm_var): Update vec_perm_builder constructor.
        (expand_mult_highpart): Use vec_perm_builder instead of
        auto_vec_perm_indices.
        * optabs-query.c (can_mult_highpart_p): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.  Use a single
        or double series encoding as appropriate.
        * fold-const.c (fold_ternary_loc): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
        (vect_permute_store_chain): Likewise.
        (vect_grouped_load_supported): Likewise.
        (vect_permute_load_chain): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        * tree-vect-slp.c (vect_build_slp_tree_1): Likewise.
        (vect_transform_slp_perm_load): Likewise.
        (vect_schedule_slp_instance): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (vectorizable_mask_load_store): Likewise.
        (vectorizable_bswap): Likewise.
        (vectorizable_store): Likewise.
        (vectorizable_load): Likewise.
        * tree-vect-generic.c (lower_vec_perm): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.  Use
        tree_to_vec_perm_builder to read the vector from a tree.
        * tree-vect-loop.c (calc_vec_perm_mask_for_shift): Take a
        vec_perm_builder instead of a vec_perm_indices.
        (have_whole_vector_shift): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.  Leave the
        truncation to calc_vec_perm_mask_for_shift.
        (vect_create_epilog_for_reduction): Likewise.
        * config/aarch64/aarch64.c (expand_vec_perm_d::perm): Change
        from auto_vec_perm_indices to vec_perm_indices.
        (aarch64_expand_vec_perm_const_1): Use rotate_inputs on d.perm
        instead of changing individual elements.
        (aarch64_vectorize_vec_perm_const): Use new_vector to install
        the vector in d.perm.
        * config/arm/arm.c (expand_vec_perm_d::perm): Change
        from auto_vec_perm_indices to vec_perm_indices.
        (arm_expand_vec_perm_const_1): Use rotate_inputs on d.perm
        instead of changing individual elements.
        (arm_vectorize_vec_perm_const): Use new_vector to install
        the vector in d.perm.
        * config/powerpcspe/powerpcspe.c (rs6000_expand_extract_even):
        Update vec_perm_builder constructor.
        (rs6000_expand_interleave): Likewise.
        * config/rs6000/rs6000.c (rs6000_expand_extract_even): Likewise.
        (rs6000_expand_interleave): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.c (can_vec_perm_var_p): Check whether lowering
        to qimode could truncate the indices.
        * optabs.c (expand_vec_perm_var): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * Makefile.in (OBJS): Add vec-perm-indices.o.
        * vec-perm-indices.h: New file.
        * vec-perm-indices.c: Likewise.
        * target.h (vec_perm_indices): Replace with a forward class
        declaration.
        (auto_vec_perm_indices): Move to vec-perm-indices.h.
        * optabs.h: Include vec-perm-indices.h.
        (expand_vec_perm): Delete.
        (selector_fits_mode_p, expand_vec_perm_var): Declare.
        (expand_vec_perm_const): Declare.
        * target.def (vec_perm_const_ok): Replace with...
        (vec_perm_const): ...this new hook.
        * doc/tm.texi.in (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Replace with...
        (TARGET_VECTORIZE_VEC_PERM_CONST): ...this new hook.
        * doc/tm.texi: Regenerate.
        * optabs.def (vec_perm_const): Delete.
        * doc/md.texi (vec_perm_const): Likewise.
        (vec_perm): Refer to TARGET_VECTORIZE_VEC_PERM_CONST.
        * expr.c (expand_expr_real_2): Use expand_vec_perm_const rather than
        expand_vec_perm for constant permutation vectors.  Assert that
        the mode of variable permutation vectors is the integer equivalent
        of the mode that is being permuted.
        * optabs-query.h (selector_fits_mode_p): Declare.
        * optabs-query.c: Include vec-perm-indices.h.
        (selector_fits_mode_p): New function.
        (can_vec_perm_const_p): Check whether targetm.vectorize.vec_perm_const
        is defined, instead of checking whether the vec_perm_const_optab
        exists.  Use targetm.vectorize.vec_perm_const instead of
        targetm.vectorize.vec_perm_const_ok.  Check whether the indices
        fit in the vector mode before using a variable permute.
        * optabs.c (shift_amt_for_vec_perm_mask): Take a mode and a
        vec_perm_indices instead of an rtx.
        (expand_vec_perm): Replace with...
        (expand_vec_perm_const): ...this new function.  Take the selector
        as a vec_perm_indices rather than an rtx.  Also take the mode of
        the selector.  Update call to shift_amt_for_vec_perm_mask.
        Use targetm.vectorize.vec_perm_const instead of vec_perm_const_optab.
        Use vec_perm_indices::new_expanded_vector to expand the original
        selector into bytes.  Check whether the indices fit in the vector
        mode before using a variable permute.
        (expand_vec_perm_var): Make global.
        (expand_mult_highpart): Use expand_vec_perm_const.
        * fold-const.c: Includes vec-perm-indices.h.
        * tree-ssa-forwprop.c: Likewise.
        * tree-vect-data-refs.c: Likewise.
        * tree-vect-generic.c: Likewise.
        * tree-vect-loop.c: Likewise.
        * tree-vect-slp.c: Likewise.
        * tree-vect-stmts.c: Likewise.
        * config/aarch64/aarch64-protos.h (aarch64_expand_vec_perm_const):
        Delete.
        * config/aarch64/aarch64-simd.md (vec_perm_const<mode>): Delete.
        * config/aarch64/aarch64.c (aarch64_expand_vec_perm_const)
        (aarch64_vectorize_vec_perm_const_ok): Fuse into...
        (aarch64_vectorize_vec_perm_const): ...this new function.
        (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        * config/arm/arm-protos.h (arm_expand_vec_perm_const): Delete.
        * config/arm/vec-common.md (vec_perm_const<mode>): Delete.
        * config/arm/arm.c (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        (arm_expand_vec_perm_const, arm_vectorize_vec_perm_const_ok): Merge
        into...
        (arm_vectorize_vec_perm_const): ...this new function.  Explicitly
        check for NEON modes.
        * config/i386/i386-protos.h (ix86_expand_vec_perm_const): Delete.
        * config/i386/sse.md (VEC_PERM_CONST, vec_perm_const<mode>): Delete.
        * config/i386/i386.c (ix86_expand_vec_perm_const_1): Update comment.
        (ix86_expand_vec_perm_const, ix86_vectorize_vec_perm_const_ok): Merge
        into...
        (ix86_vectorize_vec_perm_const): ...this new function.  Incorporate
        the old VEC_PERM_CONST conditions.
        * config/ia64/ia64-protos.h (ia64_expand_vec_perm_const): Delete.
        * config/ia64/vect.md (vec_perm_const<mode>): Delete.
        * config/ia64/ia64.c (ia64_expand_vec_perm_const)
        (ia64_vectorize_vec_perm_const_ok): Merge into...
        (ia64_vectorize_vec_perm_const): ...this new function.
        * config/mips/loongson.md (vec_perm_const<mode>): Delete.
        * config/mips/mips-msa.md (vec_perm_const<mode>): Delete.
        * config/mips/mips-ps-3d.md (vec_perm_constv2sf): Delete.
        * config/mips/mips-protos.h (mips_expand_vec_perm_const): Delete.
        * config/mips/mips.c (mips_expand_vec_perm_const)
        (mips_vectorize_vec_perm_const_ok): Merge into...
        (mips_vectorize_vec_perm_const): ...this new function.
        * config/powerpcspe/altivec.md (vec_perm_constv16qi): Delete.
        * config/powerpcspe/paired.md (vec_perm_constv2sf): Delete.
        * config/powerpcspe/spe.md (vec_perm_constv2si): Delete.
        * config/powerpcspe/vsx.md (vec_perm_const<mode>): Delete.
        * config/powerpcspe/powerpcspe-protos.h (altivec_expand_vec_perm_const)
        (rs6000_expand_vec_perm_const): Delete.
        * config/powerpcspe/powerpcspe.c (TARGET_VECTORIZE_VEC_PERM_CONST_OK):
        Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        (altivec_expand_vec_perm_const_le): Take each operand individually.
        Operate on constant selectors rather than rtxes.
        (altivec_expand_vec_perm_const): Likewise.  Update call to
        altivec_expand_vec_perm_const_le.
        (rs6000_expand_vec_perm_const): Delete.
        (rs6000_vectorize_vec_perm_const_ok): Delete.
        (rs6000_vectorize_vec_perm_const): New function.
        (rs6000_do_expand_vec_perm): Take a vec_perm_builder instead of
        an element count and rtx array.
        (rs6000_expand_extract_even): Update call accordingly.
        (rs6000_expand_interleave): Likewise.
        * config/rs6000/altivec.md (vec_perm_constv16qi): Delete.
        * config/rs6000/paired.md (vec_perm_constv2sf): Delete.
        * config/rs6000/vsx.md (vec_perm_const<mode>): Delete.
        * config/rs6000/rs6000-protos.h (altivec_expand_vec_perm_const)
        (rs6000_expand_vec_perm_const): Delete.
        * config/rs6000/rs6000.c (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        (altivec_expand_vec_perm_const_le): Take each operand individually.
        Operate on constant selectors rather than rtxes.
        (altivec_expand_vec_perm_const): Likewise.  Update call to
        altivec_expand_vec_perm_const_le.
        (rs6000_expand_vec_perm_const): Delete.
        (rs6000_vectorize_vec_perm_const_ok): Delete.
        (rs6000_vectorize_vec_perm_const): New function.  Remove stray
        reference to the SPE evmerge intructions.
        (rs6000_do_expand_vec_perm): Take a vec_perm_builder instead of
        an element count and rtx array.
        (rs6000_expand_extract_even): Update call accordingly.
        (rs6000_expand_interleave): Likewise.
        * config/sparc/sparc.md (vec_perm_constv8qi): Delete in favor of...
        * config/sparc/sparc.c (sparc_vectorize_vec_perm_const): ...this
        new function.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs.c (expand_vec_perm_1): Assert that SEL has an integer
        vector mode and that that mode matches the mode of the data
        being permuted.
        (expand_vec_perm): Split handling of non-CONST_VECTOR selectors
        out into expand_vec_perm_var.  Do all CONST_VECTOR handling here,
        directly using expand_vec_perm_1 when forcing selectors into
        registers.
        (expand_vec_perm_var): New function, split out from expand_vec_perm.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.h (can_vec_perm_p): Delete.
        (can_vec_perm_var_p, can_vec_perm_const_p): Declare.
        * optabs-query.c (can_vec_perm_p): Split into...
        (can_vec_perm_var_p, can_vec_perm_const_p): ...these two functions.
        (can_mult_highpart_p): Use can_vec_perm_const_p to test whether a
        particular selector is valid.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
        (vect_grouped_load_supported): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        * tree-vect-slp.c (vect_build_slp_tree_1): Likewise.
        (vect_transform_slp_perm_load): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (vectorizable_bswap): Likewise.
        (vect_gen_perm_mask_checked): Likewise.
        * fold-const.c (fold_ternary_loc): Likewise.  Don't take
        implementations of variable permutation vectors into account
        when deciding which selector to use.
        * tree-vect-loop.c (have_whole_vector_shift): Don't check whether
        vec_perm_const_optab is supported; instead use can_vec_perm_const_p
        with a false third argument.
        * tree-vect-generic.c (lower_vec_perm): Use can_vec_perm_const_p
        to test whether the constant selector is valid and can_vec_perm_var_p
        to test whether a variable selector is valid.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.h (can_vec_perm_p): Take a const vec_perm_indices *.
        * optabs-query.c (can_vec_perm_p): Likewise.
        * fold-const.c (fold_vec_perm): Take a const vec_perm_indices &
        instead of vec_perm_indices.
        * tree-vectorizer.h (vect_gen_perm_mask_any): Likewise,
        (vect_gen_perm_mask_checked): Likewise,
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Likewise,
        (vect_gen_perm_mask_checked): Likewise,

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.h (qimode_for_vec_perm): Declare.
        * optabs-query.c (can_vec_perm_p): Split out qimode search to...
        (qimode_for_vec_perm): ...this new function.
        * optabs.c (expand_vec_perm): Use qimode_for_vec_perm.

2018-01-02  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * rtlanal.c (canonicalize_condition): Return 0 if final rtx
        does not have a conditional at the top.

2018-01-02  Richard Biener  <rguenther@suse.de>

        * ipa-inline.c (big_speedup_p): Fix expression.

2018-01-02  Jan Hubicka  <hubicka@ucw.cz>

        PR target/81616
        * config/i386/x86-tune-costs.h: Increase cost of integer load costs
        for generic 4->6.

2018-01-02  Jan Hubicka  <hubicka@ucw.cz>

        PR target/81616
        Generic tuning.
        * x86-tune-costs.h (generic_cost): Reduce cost of FDIV 20->17,
        cost of sqrt 20->14, DIVSS 18->13, DIVSD 32->17, SQRtSS 30->14
        and SQRTsD 58->18, cond_not_taken_branch_cost. 2->1. Increase
        cond_taken_branch_cost 3->4.

2018-01-01  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/83581
        * tree-loop-distribution.c (pass_loop_distribution::execute): Return
        TODO_cleanup_cfg if any changes have been made.

        PR middle-end/83608
        * expr.c (store_expr_with_bounds): Use simplify_gen_subreg instead of
        convert_modes if target mode has the right side, but different mode
        class.

        PR middle-end/83609
        * expr.c (expand_assignment): Fix up a typo in simplify_gen_subreg
        last argument when extracting from CONCAT.  If either from_real or
        from_imag is NULL, use expansion through memory.  If result is not
        a CONCAT and simplify_gen_subreg fails, try to simplify_gen_subreg
        the parts directly to inner mode, if even that fails, use expansion
        through memory.

        PR middle-end/83623
        * expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
        check for bswap in mode rather than HImode and use that in expand_unop
        too.
\f
Copyright (C) 2018 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.