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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2018-01-25 08:49:33 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2018-01-25 08:49:33 +0000 |
commit | 8bbc33baa40010c8f5ca1af9b8bfffd67ae654ad (patch) | |
tree | c5e2748190eff9453ae08b9117c4c546c48cc539 /gcc/regrename.h | |
parent | 03ac50856c9fc8c96b7a17239ee40a10397750a7 (diff) | |
download | gcc-tarball-8bbc33baa40010c8f5ca1af9b8bfffd67ae654ad.tar.gz |
Diffstat (limited to 'gcc/regrename.h')
-rw-r--r-- | gcc/regrename.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/gcc/regrename.h b/gcc/regrename.h new file mode 100644 index 0000000000..e249b1fe1d --- /dev/null +++ b/gcc/regrename.h @@ -0,0 +1,107 @@ +/* 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 |