137 lines
5.3 KiB
C
137 lines
5.3 KiB
C
/* Export function prototypes from explow.c.
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Copyright (C) 2015-2018 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_EXPLOW_H
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#define GCC_EXPLOW_H
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/* Return a memory reference like MEMREF, but which is known to have a
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valid address. */
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extern rtx validize_mem (rtx);
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extern rtx use_anchored_address (rtx);
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/* Copy given rtx to a new temp reg and return that. */
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extern rtx copy_to_reg (rtx);
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/* Like copy_to_reg but always make the reg Pmode. */
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extern rtx copy_addr_to_reg (rtx);
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/* Like copy_to_reg but always make the reg the specified mode MODE. */
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extern rtx copy_to_mode_reg (machine_mode, rtx);
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/* Copy given rtx to given temp reg and return that. */
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extern rtx copy_to_suggested_reg (rtx, rtx, machine_mode);
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/* Copy a value to a register if it isn't already a register.
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Args are mode (in case value is a constant) and the value. */
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extern rtx force_reg (machine_mode, rtx);
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/* Return given rtx, copied into a new temp reg if it was in memory. */
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extern rtx force_not_mem (rtx);
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/* Return mode and signedness to use when an argument or result in the
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given mode is promoted. */
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extern machine_mode promote_function_mode (const_tree, machine_mode, int *,
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const_tree, int);
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/* Return mode and signedness to use when an object in the given mode
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is promoted. */
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extern machine_mode promote_mode (const_tree, machine_mode, int *);
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/* Return mode and signedness to use when object is promoted. */
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machine_mode promote_decl_mode (const_tree, int *);
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/* Return mode and signedness to use when object is promoted. */
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machine_mode promote_ssa_mode (const_tree, int *);
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/* Remove some bytes from the stack. An rtx says how many. */
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extern void adjust_stack (rtx);
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/* Add some bytes to the stack. An rtx says how many. */
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extern void anti_adjust_stack (rtx);
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/* Add some bytes to the stack while probing it. An rtx says how many. */
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extern void anti_adjust_stack_and_probe (rtx, bool);
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/* Support for building allocation/probing loops for stack-clash
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protection of dyamically allocated stack space. */
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extern void compute_stack_clash_protection_loop_data (rtx *, rtx *, rtx *,
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HOST_WIDE_INT *, rtx);
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extern void emit_stack_clash_protection_probe_loop_start (rtx *, rtx *,
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rtx, bool);
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extern void emit_stack_clash_protection_probe_loop_end (rtx, rtx,
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rtx, bool);
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/* This enum is used for the following two functions. */
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enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
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/* Save the stack pointer at the specified level. */
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extern void emit_stack_save (enum save_level, rtx *);
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/* Restore the stack pointer from a save area of the specified level. */
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extern void emit_stack_restore (enum save_level, rtx);
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/* Invoke emit_stack_save for the nonlocal_goto_save_area. */
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extern void update_nonlocal_goto_save_area (void);
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/* Record a new stack level. */
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extern void record_new_stack_level (void);
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/* Allocate some space on the stack dynamically and return its address. */
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extern rtx allocate_dynamic_stack_space (rtx, unsigned, unsigned,
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HOST_WIDE_INT, bool);
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/* Calculate the necessary size of a constant dynamic stack allocation from the
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size of the variable area. */
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extern void get_dynamic_stack_size (rtx *, unsigned, unsigned, HOST_WIDE_INT *);
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/* Returns the address of the dynamic stack space without allocating it. */
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extern rtx get_dynamic_stack_base (poly_int64, unsigned);
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/* Emit one stack probe at ADDRESS, an address within the stack. */
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extern void emit_stack_probe (rtx);
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/* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
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FIRST is a constant and size is a Pmode RTX. These are offsets from
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the current stack pointer. STACK_GROWS_DOWNWARD says whether to add
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or subtract them from the stack pointer. */
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extern void probe_stack_range (HOST_WIDE_INT, rtx);
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/* Return an rtx that refers to the value returned by a library call
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in its original home. This becomes invalid if any more code is emitted. */
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extern rtx hard_libcall_value (machine_mode, rtx);
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/* Return an rtx that refers to the value returned by a function
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in its original home. This becomes invalid if any more code is emitted. */
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extern rtx hard_function_value (const_tree, const_tree, const_tree, int);
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/* Convert arg to a valid memory address for specified machine mode that points
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to a specific named address space, by emitting insns to perform arithmetic
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if necessary. */
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extern rtx memory_address_addr_space (machine_mode, rtx, addr_space_t);
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extern rtx eliminate_constant_term (rtx, rtx *);
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/* Like memory_address_addr_space, except assume the memory address points to
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the generic named address space. */
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#define memory_address(MODE,RTX) \
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memory_address_addr_space ((MODE), (RTX), ADDR_SPACE_GENERIC)
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#endif /* GCC_EXPLOW_H */
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