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authorSam Thursfield <sam.thursfield@codethink.co.uk>2017-11-13 16:28:05 +0000
committerSam Thursfield <sam.thursfield@codethink.co.uk>2017-11-13 16:29:09 +0000
commit03ac50856c9fc8c96b7a17239ee40a10397750a7 (patch)
treea648c6d3428e4757e003f6ed1748adb9613065db /gcc/regrename.h
parent34efdaf078b01a7387007c4e6bde6db86384c4b7 (diff)
downloadgcc-tarball-03ac50856c9fc8c96b7a17239ee40a10397750a7.tar.gz
gcc 7.2.0
This is imported manually due to a bug in the tarball import script. See the baserock-dev mailing list archives (November 2017) for a more detailed explaination of the issue.
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diff --git a/gcc/regrename.h b/gcc/regrename.h
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-/* This file contains definitions for the register renamer.
- Copyright (C) 2011-2017 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_REGRENAME_H
-#define GCC_REGRENAME_H
-
-/* We keep linked lists of DU_HEAD structures, each of which describes
- a chain of occurrences of a reg. */
-struct du_head
-{
- /* The next chain. */
- struct du_head *next_chain;
- /* The first and last elements of this chain. */
- struct du_chain *first, *last;
- /* The chain that this chain is tied to. */
- struct du_head *tied_chain;
- /* Describes the register being tracked. */
- unsigned regno;
- int nregs;
-
- /* A unique id to be used as an index into the conflicts bitmaps. */
- unsigned id;
- /* A bitmap to record conflicts with other chains. */
- bitmap_head conflicts;
- /* Conflicts with untracked hard registers. */
- HARD_REG_SET hard_conflicts;
-
- /* Nonzero if the chain crosses a call. */
- unsigned int need_caller_save_reg:1;
- /* Nonzero if the register is used in a way that prevents renaming,
- such as the SET_DEST of a CALL_INSN or an asm operand that used
- to be a hard register. */
- unsigned int cannot_rename:1;
- /* Nonzero if the chain has already been renamed. */
- unsigned int renamed:1;
-
- /* Fields for use by target code. */
- unsigned int target_data_1;
- unsigned int target_data_2;
-};
-
-typedef struct du_head *du_head_p;
-
-/* This struct describes a single occurrence of a register. */
-struct du_chain
-{
- /* Links to the next occurrence of the register. */
- struct du_chain *next_use;
-
- /* The insn where the register appears. */
- rtx_insn *insn;
- /* The location inside the insn. */
- rtx *loc;
- /* The register class required by the insn at this location. */
- ENUM_BITFIELD(reg_class) cl : 16;
-};
-
-/* This struct describes data gathered during regrename_analyze about
- a single operand of an insn. */
-struct operand_rr_info
-{
- /* The number of chains recorded for this operand. */
- short n_chains;
- bool failed;
- /* Holds either the chain for the operand itself, or for the registers in
- a memory operand. */
- struct du_chain *chains[MAX_REGS_PER_ADDRESS];
- struct du_head *heads[MAX_REGS_PER_ADDRESS];
-};
-
-/* A struct to hold a vector of operand_rr_info structures describing the
- operands of an insn. */
-struct insn_rr_info
-{
- operand_rr_info *op_info;
-};
-
-
-extern vec<insn_rr_info> insn_rr;
-
-extern void regrename_init (bool);
-extern void regrename_finish (void);
-extern void regrename_analyze (bitmap);
-extern du_head_p regrename_chain_from_id (unsigned int);
-extern int find_rename_reg (du_head_p, enum reg_class, HARD_REG_SET *, int,
- bool);
-extern bool regrename_do_replace (du_head_p, int);
-extern reg_class regrename_find_superclass (du_head_p, int *,
- HARD_REG_SET *);
-
-#endif