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 */ 193