gcc/emit-rtl.h

   1 /* Exported functions from emit-rtl.c
   2    Copyright (C) 2004-2015 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_EMIT_RTL_H
  21 #define GCC_EMIT_RTL_H
  22
  23 /* Return whether two MEM_ATTRs are equal.  */
  24 bool mem_attrs_eq_p (const struct mem_attrs *, const struct mem_attrs *);
  25
  26 /* Set the alias set of MEM to SET.  */
  27 extern void set_mem_alias_set (rtx, alias_set_type);
  28
  29 /* Set the alignment of MEM to ALIGN bits.  */
  30 extern void set_mem_align (rtx, unsigned int);
  31
  32 /* Set the address space of MEM to ADDRSPACE.  */
  33 extern void set_mem_addr_space (rtx, addr_space_t);
  34
  35 /* Set the expr for MEM to EXPR.  */
  36 extern void set_mem_expr (rtx, tree);
  37
  38 /* Set the offset for MEM to OFFSET.  */
  39 extern void set_mem_offset (rtx, HOST_WIDE_INT);
  40
  41 /* Clear the offset recorded for MEM.  */
  42 extern void clear_mem_offset (rtx);
  43
  44 /* Set the size for MEM to SIZE.  */
  45 extern void set_mem_size (rtx, HOST_WIDE_INT);
  46
  47 /* Clear the size recorded for MEM.  */
  48 extern void clear_mem_size (rtx);
  49
  50 /* Set the attributes for MEM appropriate for a spill slot.  */
  51 extern void set_mem_attrs_for_spill (rtx);
  52 extern tree get_spill_slot_decl (bool);
  53
  54 /* Return a memory reference like MEMREF, but with its address changed to
  55    ADDR.  The caller is asserting that the actual piece of memory pointed
  56    to is the same, just the form of the address is being changed, such as
  57    by putting something into a register.  */
  58 extern rtx replace_equiv_address (rtx, rtx, bool = false);
  59
  60 /* Likewise, but the reference is not required to be valid.  */
  61 extern rtx replace_equiv_address_nv (rtx, rtx, bool = false);
  62
  63 extern rtx gen_blockage (void);
  64 extern rtvec gen_rtvec (int, ...);
  65 extern rtx copy_insn_1 (rtx);
  66 extern rtx copy_insn (rtx);
  67 extern rtx_insn *copy_delay_slot_insn (rtx_insn *);
  68 extern rtx gen_int_mode (HOST_WIDE_INT, machine_mode);
  69 extern rtx_insn *emit_copy_of_insn_after (rtx_insn *, rtx_insn *);
  70 extern void set_reg_attrs_from_value (rtx, rtx);
  71 extern void set_reg_attrs_for_parm (rtx, rtx);
  72 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
  73 extern void adjust_reg_mode (rtx, machine_mode);
  74 extern int mem_expr_equal_p (const_tree, const_tree);
  75
  76 extern bool need_atomic_barrier_p (enum memmodel, bool);
  77
  78 /* Return the first insn of the current sequence or current function.  */
  79
  80 static inline rtx_insn *
  81 get_insns (void)
  82 {
  83   return crtl->emit.x_first_insn;
  84 }
  85
  86 /* Specify a new insn as the first in the chain.  */
  87
  88 static inline void
  89 set_first_insn (rtx_insn *insn)
  90 {
  91   gcc_checking_assert (!insn || !PREV_INSN (insn));
  92   crtl->emit.x_first_insn = insn;
  93 }
  94
  95 /* Return the last insn emitted in current sequence or current function.  */
  96
  97 static inline rtx_insn *
  98 get_last_insn (void)
  99 {
 100   return crtl->emit.x_last_insn;
 101 }
 102
 103 /* Specify a new insn as the last in the chain.  */
 104
 105 static inline void
 106 set_last_insn (rtx_insn *insn)
 107 {
 108   gcc_checking_assert (!insn || !NEXT_INSN (insn));
 109   crtl->emit.x_last_insn = insn;
 110 }
 111
 112 /* Return a number larger than any instruction's uid in this function.  */
 113
 114 static inline int
 115 get_max_uid (void)
 116 {
 117   return crtl->emit.x_cur_insn_uid;
 118 }
 119
 120 extern void set_decl_incoming_rtl (tree, rtx, bool);
 121
 122 /* Return a memory reference like MEMREF, but with its mode changed
 123    to MODE and its address changed to ADDR.
 124    (VOIDmode means don't change the mode.
 125    NULL for ADDR means don't change the address.)  */
 126 extern rtx change_address (rtx, machine_mode, rtx);
 127
 128 /* Return a memory reference like MEMREF, but with its mode changed
 129    to MODE and its address offset by OFFSET bytes.  */
 130 #define adjust_address(MEMREF, MODE, OFFSET) \
 131   adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 0, 0)
 132
 133 /* Likewise, but the reference is not required to be valid.  */
 134 #define adjust_address_nv(MEMREF, MODE, OFFSET) \
 135   adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1, 0, 0)
 136
 137 /* Return a memory reference like MEMREF, but with its mode changed
 138    to MODE and its address offset by OFFSET bytes.  Assume that it's
 139    for a bitfield and conservatively drop the underlying object if we
 140    cannot be sure to stay within its bounds.  */
 141 #define adjust_bitfield_address(MEMREF, MODE, OFFSET) \
 142   adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 1, 0)
 143
 144 /* As for adjust_bitfield_address, but specify that the width of
 145    BLKmode accesses is SIZE bytes.  */
 146 #define adjust_bitfield_address_size(MEMREF, MODE, OFFSET, SIZE) \
 147   adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 1, SIZE)
 148
 149 /* Likewise, but the reference is not required to be valid.  */
 150 #define adjust_bitfield_address_nv(MEMREF, MODE, OFFSET) \
 151   adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1, 1, 0)
 152
 153 /* Return a memory reference like MEMREF, but with its mode changed
 154    to MODE and its address changed to ADDR, which is assumed to be
 155    increased by OFFSET bytes from MEMREF.  */
 156 #define adjust_automodify_address(MEMREF, MODE, ADDR, OFFSET) \
 157   adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 1)
 158
 159 /* Likewise, but the reference is not required to be valid.  */
 160 #define adjust_automodify_address_nv(MEMREF, MODE, ADDR, OFFSET) \
 161   adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 0)
 162
 163 extern rtx adjust_address_1 (rtx, machine_mode, HOST_WIDE_INT, int, int,
 164                              int, HOST_WIDE_INT);
 165 extern rtx adjust_automodify_address_1 (rtx, machine_mode, rtx,
 166                                         HOST_WIDE_INT, int);
 167
 168 /* Return a memory reference like MEMREF, but whose address is changed by
 169    adding OFFSET, an RTX, to it.  POW2 is the highest power of two factor
 170    known to be in OFFSET (possibly 1).  */
 171 extern rtx offset_address (rtx, rtx, unsigned HOST_WIDE_INT);
 172
 173 /* Given REF, a MEM, and T, either the type of X or the expression
 174    corresponding to REF, set the memory attributes.  OBJECTP is nonzero
 175    if we are making a new object of this type.  */
 176 extern void set_mem_attributes (rtx, tree, int);
 177
 178 /* Similar, except that BITPOS has not yet been applied to REF, so if
 179    we alter MEM_OFFSET according to T then we should subtract BITPOS
 180    expecting that it'll be added back in later.  */
 181 extern void set_mem_attributes_minus_bitpos (rtx, tree, int, HOST_WIDE_INT);
 182
 183 /* Return OFFSET if XEXP (MEM, 0) - OFFSET is known to be ALIGN
 184    bits aligned for 0 <= OFFSET < ALIGN / BITS_PER_UNIT, or
 185    -1 if not known.  */
 186 extern int get_mem_align_offset (rtx, unsigned int);
 187
 188 /* Return a memory reference like MEMREF, but with its mode widened to
 189    MODE and adjusted by OFFSET.  */
 190 extern rtx widen_memory_access (rtx, machine_mode, HOST_WIDE_INT);
 191
 192 #endif /* GCC_EMIT_RTL_H */