| /* Export function prototypes from explow.c. |
| Copyright (C) 2015-2019 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_EXPLOW_H |
| #define GCC_EXPLOW_H |
| |
| /* Return a memory reference like MEMREF, but which is known to have a |
| valid address. */ |
| extern rtx validize_mem (rtx); |
| |
| extern rtx use_anchored_address (rtx); |
| |
| /* Copy given rtx to a new temp reg and return that. */ |
| extern rtx copy_to_reg (rtx); |
| |
| /* Like copy_to_reg but always make the reg Pmode. */ |
| extern rtx copy_addr_to_reg (rtx); |
| |
| /* Like copy_to_reg but always make the reg the specified mode MODE. */ |
| extern rtx copy_to_mode_reg (machine_mode, rtx); |
| |
| /* Copy given rtx to given temp reg and return that. */ |
| extern rtx copy_to_suggested_reg (rtx, rtx, machine_mode); |
| |
| /* Copy a value to a register if it isn't already a register. |
| Args are mode (in case value is a constant) and the value. */ |
| extern rtx force_reg (machine_mode, rtx); |
| |
| /* Return given rtx, copied into a new temp reg if it was in memory. */ |
| extern rtx force_not_mem (rtx); |
| |
| /* Return mode and signedness to use when an argument or result in the |
| given mode is promoted. */ |
| extern machine_mode promote_function_mode (const_tree, machine_mode, int *, |
| const_tree, int); |
| |
| /* Return mode and signedness to use when an object in the given mode |
| is promoted. */ |
| extern machine_mode promote_mode (const_tree, machine_mode, int *); |
| |
| /* Return mode and signedness to use when object is promoted. */ |
| machine_mode promote_decl_mode (const_tree, int *); |
| |
| /* Return mode and signedness to use when object is promoted. */ |
| machine_mode promote_ssa_mode (const_tree, int *); |
| |
| /* Remove some bytes from the stack. An rtx says how many. */ |
| extern void adjust_stack (rtx); |
| |
| /* Add some bytes to the stack. An rtx says how many. */ |
| extern void anti_adjust_stack (rtx); |
| |
| /* Add some bytes to the stack while probing it. An rtx says how many. */ |
| extern void anti_adjust_stack_and_probe (rtx, bool); |
| |
| /* Support for building allocation/probing loops for stack-clash |
| protection of dyamically allocated stack space. */ |
| extern void compute_stack_clash_protection_loop_data (rtx *, rtx *, rtx *, |
| HOST_WIDE_INT *, rtx); |
| extern void emit_stack_clash_protection_probe_loop_start (rtx *, rtx *, |
| rtx, bool); |
| extern void emit_stack_clash_protection_probe_loop_end (rtx, rtx, |
| rtx, bool); |
| |
| /* This enum is used for the following two functions. */ |
| enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL}; |
| |
| /* Save the stack pointer at the specified level. */ |
| extern void emit_stack_save (enum save_level, rtx *); |
| |
| /* Restore the stack pointer from a save area of the specified level. */ |
| extern void emit_stack_restore (enum save_level, rtx); |
| |
| /* Invoke emit_stack_save for the nonlocal_goto_save_area. */ |
| extern void update_nonlocal_goto_save_area (void); |
| |
| /* Record a new stack level. */ |
| extern void record_new_stack_level (void); |
| |
| /* Allocate some space on the stack dynamically and return its address. */ |
| extern rtx allocate_dynamic_stack_space (rtx, unsigned, unsigned, |
| HOST_WIDE_INT, bool); |
| |
| /* Calculate the necessary size of a constant dynamic stack allocation from the |
| size of the variable area. */ |
| extern void get_dynamic_stack_size (rtx *, unsigned, unsigned, HOST_WIDE_INT *); |
| |
| /* Returns the address of the dynamic stack space without allocating it. */ |
| extern rtx get_dynamic_stack_base (poly_int64, unsigned); |
| |
| /* Return an rtx doing runtime alignment to REQUIRED_ALIGN on TARGET. */ |
| extern rtx align_dynamic_address (rtx, unsigned); |
| |
| /* Emit one stack probe at ADDRESS, an address within the stack. */ |
| extern void emit_stack_probe (rtx); |
| |
| /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive. |
| FIRST is a constant and size is a Pmode RTX. These are offsets from |
| the current stack pointer. STACK_GROWS_DOWNWARD says whether to add |
| or subtract them from the stack pointer. */ |
| extern void probe_stack_range (HOST_WIDE_INT, rtx); |
| |
| /* Return an rtx that refers to the value returned by a library call |
| in its original home. This becomes invalid if any more code is emitted. */ |
| extern rtx hard_libcall_value (machine_mode, rtx); |
| |
| /* Return an rtx that refers to the value returned by a function |
| in its original home. This becomes invalid if any more code is emitted. */ |
| extern rtx hard_function_value (const_tree, const_tree, const_tree, int); |
| |
| /* Convert arg to a valid memory address for specified machine mode that points |
| to a specific named address space, by emitting insns to perform arithmetic |
| if necessary. */ |
| extern rtx memory_address_addr_space (machine_mode, rtx, addr_space_t); |
| |
| extern rtx eliminate_constant_term (rtx, rtx *); |
| |
| /* Like memory_address_addr_space, except assume the memory address points to |
| the generic named address space. */ |
| #define memory_address(MODE,RTX) \ |
| memory_address_addr_space ((MODE), (RTX), ADDR_SPACE_GENERIC) |
| |
| #endif /* GCC_EXPLOW_H */ |