/* Export function prototypes from explow.c. Copyright (C) 2015-2022 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 . */ #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); /* Add some bytes to the stack while probing it. An rtx says how many. Add additional probes to prevent stack clashing attacks. */ extern void anti_adjust_stack_and_probe_stack_clash (rtx); /* 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, rtx); /* 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 */