1/* Export function prototypes from explow.c. 2 Copyright (C) 2015-2016 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along with GCC; see the file COPYING3. If not see 18<http://www.gnu.org/licenses/>. */ 19 20#ifndef GCC_EXPLOW_H 21#define GCC_EXPLOW_H 22 23/* Return a memory reference like MEMREF, but which is known to have a 24 valid address. */ 25extern rtx validize_mem (rtx); 26 27extern rtx use_anchored_address (rtx); 28 29/* Copy given rtx to a new temp reg and return that. */ 30extern rtx copy_to_reg (rtx); 31 32/* Like copy_to_reg but always make the reg Pmode. */ 33extern rtx copy_addr_to_reg (rtx); 34 35/* Like copy_to_reg but always make the reg the specified mode MODE. */ 36extern rtx copy_to_mode_reg (machine_mode, rtx); 37 38/* Copy given rtx to given temp reg and return that. */ 39extern rtx copy_to_suggested_reg (rtx, rtx, machine_mode); 40 41/* Copy a value to a register if it isn't already a register. 42 Args are mode (in case value is a constant) and the value. */ 43extern rtx force_reg (machine_mode, rtx); 44 45/* Return given rtx, copied into a new temp reg if it was in memory. */ 46extern rtx force_not_mem (rtx); 47 48/* Return mode and signedness to use when an argument or result in the 49 given mode is promoted. */ 50extern machine_mode promote_function_mode (const_tree, machine_mode, int *, 51 const_tree, int); 52 53/* Return mode and signedness to use when an object in the given mode 54 is promoted. */ 55extern machine_mode promote_mode (const_tree, machine_mode, int *); 56 57/* Return mode and signedness to use when object is promoted. */ 58machine_mode promote_decl_mode (const_tree, int *); 59 60/* Remove some bytes from the stack. An rtx says how many. */ 61extern void adjust_stack (rtx); 62 63/* Add some bytes to the stack. An rtx says how many. */ 64extern void anti_adjust_stack (rtx); 65 66/* Add some bytes to the stack while probing it. An rtx says how many. */ 67extern void anti_adjust_stack_and_probe (rtx, bool); 68 69/* This enum is used for the following two functions. */ 70enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL}; 71 72/* Save the stack pointer at the specified level. */ 73extern void emit_stack_save (enum save_level, rtx *); 74 75/* Restore the stack pointer from a save area of the specified level. */ 76extern void emit_stack_restore (enum save_level, rtx); 77 78/* Invoke emit_stack_save for the nonlocal_goto_save_area. */ 79extern void update_nonlocal_goto_save_area (void); 80 81/* Allocate some space on the stack dynamically and return its address. */ 82extern rtx allocate_dynamic_stack_space (rtx, unsigned, unsigned, bool); 83 84/* Emit one stack probe at ADDRESS, an address within the stack. */ 85extern void emit_stack_probe (rtx); 86 87/* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive. 88 FIRST is a constant and size is a Pmode RTX. These are offsets from 89 the current stack pointer. STACK_GROWS_DOWNWARD says whether to add 90 or subtract them from the stack pointer. */ 91extern void probe_stack_range (HOST_WIDE_INT, rtx); 92 93/* Return an rtx that refers to the value returned by a library call 94 in its original home. This becomes invalid if any more code is emitted. */ 95extern rtx hard_libcall_value (machine_mode, rtx); 96 97/* Return an rtx that refers to the value returned by a function 98 in its original home. This becomes invalid if any more code is emitted. */ 99extern rtx hard_function_value (const_tree, const_tree, const_tree, int); 100 101/* Convert arg to a valid memory address for specified machine mode that points 102 to a specific named address space, by emitting insns to perform arithmetic 103 if necessary. */ 104extern rtx memory_address_addr_space (machine_mode, rtx, addr_space_t); 105 106extern rtx eliminate_constant_term (rtx, rtx *); 107 108/* Like memory_address_addr_space, except assume the memory address points to 109 the generic named address space. */ 110#define memory_address(MODE,RTX) \ 111 memory_address_addr_space ((MODE), (RTX), ADDR_SPACE_GENERIC) 112 113#endif /* GCC_EXPLOW_H */ 114