gcc/internal-fn.h

   1 /* Internal functions.
   2    Copyright (C) 2011-2021 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_INTERNAL_FN_H
  21 #define GCC_INTERNAL_FN_H
  22
  23 /* INTEGER_CST values for IFN_UNIQUE function arg-0.
  24
  25    UNSPEC: Undifferentiated UNIQUE.
  26
  27    FORK and JOIN mark the points at which OpenACC partitioned
  28    execution is entered or exited.
  29       DEP_VAR = UNIQUE ({FORK,JOIN}, DEP_VAR, AXIS)
  30
  31    HEAD_MARK and TAIL_MARK are used to demark the sequence entering
  32    or leaving partitioned execution.
  33       DEP_VAR = UNIQUE ({HEAD,TAIL}_MARK, REMAINING_MARKS, ...PRIMARY_FLAGS)
  34
  35    The PRIMARY_FLAGS only occur on the first HEAD_MARK of a sequence.
  36
  37    PRIVATE captures variables to be made private at the surrounding parallelism
  38    level.  */
  39 #define IFN_UNIQUE_CODES                                  \
  40   DEF(UNSPEC),  \
  41     DEF(OACC_FORK), DEF(OACC_JOIN),             \
  42     DEF(OACC_HEAD_MARK), DEF(OACC_TAIL_MARK),   \
  43     DEF(OACC_PRIVATE)
  44
  45 enum ifn_unique_kind {
  46 #define DEF(X) IFN_UNIQUE_##X
  47   IFN_UNIQUE_CODES
  48 #undef DEF
  49 };
  50
  51 /* INTEGER_CST values for IFN_GOACC_LOOP arg-0.  Allows the precise
  52    stepping of the compute geometry over the loop iterations to be
  53    deferred until it is known which compiler is generating the code.
  54    The action is encoded in a constant first argument.
  55
  56      CHUNK_MAX = LOOP (CODE_CHUNKS, DIR, RANGE, STEP, CHUNK_SIZE, MASK)
  57      STEP = LOOP (CODE_STEP, DIR, RANGE, STEP, CHUNK_SIZE, MASK)
  58      OFFSET = LOOP (CODE_OFFSET, DIR, RANGE, STEP, CHUNK_SIZE, MASK, CHUNK_NO)
  59      BOUND = LOOP (CODE_BOUND, DIR, RANGE, STEP, CHUNK_SIZE, MASK, OFFSET)
  60
  61      DIR - +1 for up loop, -1 for down loop
  62      RANGE - Range of loop (END - BASE)
  63      STEP - iteration step size
  64      CHUNKING - size of chunking, (constant zero for no chunking)
  65      CHUNK_NO - chunk number
  66      MASK - partitioning mask.  */
  67
  68 #define IFN_GOACC_LOOP_CODES \
  69   DEF(CHUNKS), DEF(STEP), DEF(OFFSET), DEF(BOUND)
  70 enum ifn_goacc_loop_kind {
  71 #define DEF(X) IFN_GOACC_LOOP_##X
  72   IFN_GOACC_LOOP_CODES
  73 #undef DEF
  74 };
  75
  76 /* The GOACC_REDUCTION function defines a generic interface to support
  77    gang, worker and vector reductions.  All calls are of the following
  78    form:
  79
  80      V = REDUCTION (CODE, REF_TO_RES, LOCAL_VAR, LEVEL, OP, OFFSET)
  81
  82    REF_TO_RES - is a reference to the original reduction varl, may be NULL
  83    LOCAL_VAR is the intermediate reduction variable
  84    LEVEL corresponds to the GOMP_DIM of the reduction
  85    OP is the tree code of the reduction operation
  86    OFFSET may be used as an offset into a reduction array for the
  87           reductions occuring at this level.
  88    In general the return value is LOCAL_VAR, which creates a data
  89    dependency between calls operating on the same reduction.  */
  90
  91 #define IFN_GOACC_REDUCTION_CODES \
  92   DEF(SETUP), DEF(INIT), DEF(FINI), DEF(TEARDOWN)
  93 enum ifn_goacc_reduction_kind {
  94 #define DEF(X) IFN_GOACC_REDUCTION_##X
  95   IFN_GOACC_REDUCTION_CODES
  96 #undef DEF
  97 };
  98
  99 /* Initialize internal function tables.  */
 100
 101 extern void init_internal_fns ();
 102
 103 /* Return the name of internal function FN.  The name is only meaningful
 104    for dumps; it has no linkage.  */
 105
 106 extern const char *const internal_fn_name_array[];
 107
 108 static inline const char *
 109 internal_fn_name (enum internal_fn fn)
 110 {
 111   return internal_fn_name_array[(int) fn];
 112 }
 113
 114 extern internal_fn lookup_internal_fn (const char *);
 115
 116 /* Return the ECF_* flags for function FN.  */
 117
 118 extern const int internal_fn_flags_array[];
 119
 120 static inline int
 121 internal_fn_flags (enum internal_fn fn)
 122 {
 123   return internal_fn_flags_array[(int) fn];
 124 }
 125
 126 /* Return fnspec for function FN.  */
 127
 128 extern GTY(()) const_tree internal_fn_fnspec_array[IFN_LAST + 1];
 129
 130 static inline const_tree
 131 internal_fn_fnspec (enum internal_fn fn)
 132 {
 133   return internal_fn_fnspec_array[(int) fn];
 134 }
 135
 136 /* Describes an internal function that maps directly to an optab.  */
 137 struct direct_internal_fn_info
 138 {
 139   /* optabs can be parameterized by one or two modes.  These fields describe
 140      how to select those modes from the types of the return value and
 141      arguments.  A value of -1 says that the mode is determined by the
 142      return type while a value N >= 0 says that the mode is determined by
 143      the type of argument N.  A value of -2 says that this internal
 144      function isn't directly mapped to an optab.  */
 145   signed int type0 : 8;
 146   signed int type1 : 8;
 147   /* True if the function is pointwise, so that it can be vectorized by
 148      converting the return type and all argument types to vectors of the
 149      same number of elements.  E.g. we can vectorize an IFN_SQRT on
 150      floats as an IFN_SQRT on vectors of N floats.
 151
 152      This only needs 1 bit, but occupies the full 16 to ensure a nice
 153      layout.  */
 154   unsigned int vectorizable : 16;
 155 };
 156
 157 extern const direct_internal_fn_info direct_internal_fn_array[IFN_LAST + 1];
 158
 159 /* Return true if FN is mapped directly to an optab.  */
 160
 161 inline bool
 162 direct_internal_fn_p (internal_fn fn)
 163 {
 164   return direct_internal_fn_array[fn].type0 >= -1;
 165 }
 166
 167 /* Return true if FN is a direct internal function that can be vectorized by
 168    converting the return type and all argument types to vectors of the same
 169    number of elements.  E.g. we can vectorize an IFN_SQRT on floats as an
 170    IFN_SQRT on vectors of N floats.  */
 171
 172 inline bool
 173 vectorizable_internal_fn_p (internal_fn fn)
 174 {
 175   return direct_internal_fn_array[fn].vectorizable;
 176 }
 177
 178 /* Return optab information about internal function FN.  Only meaningful
 179    if direct_internal_fn_p (FN).  */
 180
 181 inline const direct_internal_fn_info &
 182 direct_internal_fn (internal_fn fn)
 183 {
 184   gcc_checking_assert (direct_internal_fn_p (fn));
 185   return direct_internal_fn_array[fn];
 186 }
 187
 188 extern tree_pair direct_internal_fn_types (internal_fn, tree, tree *);
 189 extern tree_pair direct_internal_fn_types (internal_fn, gcall *);
 190 extern bool direct_internal_fn_supported_p (internal_fn, tree_pair,
 191                                             optimization_type);
 192 extern bool direct_internal_fn_supported_p (internal_fn, tree,
 193                                             optimization_type);
 194 extern bool direct_internal_fn_supported_p (gcall *, optimization_type);
 195
 196 /* Return true if FN is supported for types TYPE0 and TYPE1 when the
 197    optimization type is OPT_TYPE.  The types are those associated with
 198    the "type0" and "type1" fields of FN's direct_internal_fn_info
 199    structure.  */
 200
 201 inline bool
 202 direct_internal_fn_supported_p (internal_fn fn, tree type0, tree type1,
 203                                 optimization_type opt_type)
 204 {
 205   return direct_internal_fn_supported_p (fn, tree_pair (type0, type1),
 206                                          opt_type);
 207 }
 208
 209 extern bool commutative_binary_fn_p (internal_fn);
 210 extern bool commutative_ternary_fn_p (internal_fn);
 211 extern int first_commutative_argument (internal_fn);
 212 extern bool associative_binary_fn_p (internal_fn);
 213
 214 extern bool set_edom_supported_p (void);
 215
 216 extern internal_fn get_conditional_internal_fn (tree_code);
 217 extern internal_fn get_conditional_internal_fn (internal_fn);
 218 extern tree_code conditional_internal_fn_code (internal_fn);
 219 extern internal_fn get_unconditional_internal_fn (internal_fn);
 220 extern bool can_interpret_as_conditional_op_p (gimple *, tree *,
 221                                                tree_code *, tree (&)[3],
 222                                                tree *);
 223
 224 extern bool internal_load_fn_p (internal_fn);
 225 extern bool internal_store_fn_p (internal_fn);
 226 extern bool internal_gather_scatter_fn_p (internal_fn);
 227 extern int internal_fn_mask_index (internal_fn);
 228 extern int internal_fn_stored_value_index (internal_fn);
 229 extern bool internal_gather_scatter_fn_supported_p (internal_fn, tree,
 230                                                     tree, tree, int);
 231 extern bool internal_check_ptrs_fn_supported_p (internal_fn, tree,
 232                                                 poly_uint64, unsigned int);
 233
 234 extern void expand_addsub_overflow (location_t, tree_code, tree, tree, tree,
 235                                     bool, bool, bool, bool, tree *);
 236 extern void expand_internal_call (gcall *);
 237 extern void expand_internal_call (internal_fn, gcall *);
 238 extern void expand_PHI (internal_fn, gcall *);
 239 extern void expand_SHUFFLEVECTOR (internal_fn, gcall *);
 240
 241 extern bool vectorized_internal_fn_supported_p (internal_fn, tree);
 242
 243 #endif