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author | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
commit | 82bcbebce43f0227f506d75a5b764b6847041bae (patch) | |
tree | fe9f8597b48a430c4daeb5123e3e8eb28e6f9da9 /gcc-4.7/gcc/regrename.h | |
parent | 3c052de3bb16ac53b6b6ed659ec7557eb84c7590 (diff) | |
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Initial check-in of gcc 4.7.2.
Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365
Diffstat (limited to 'gcc-4.7/gcc/regrename.h')
-rw-r--r-- | gcc-4.7/gcc/regrename.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/gcc-4.7/gcc/regrename.h b/gcc-4.7/gcc/regrename.h new file mode 100644 index 000000000..f3969a14f --- /dev/null +++ b/gcc-4.7/gcc/regrename.h @@ -0,0 +1,101 @@ +/* This file contains definitions for the register renamer. + Copyright (C) 2011 + 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; + /* 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; +}; + +typedef struct du_head *du_head_p; +DEF_VEC_P (du_head_p); +DEF_VEC_ALLOC_P (du_head_p, heap); + +/* 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; + /* 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. */ +typedef struct +{ + /* The number of chains recorded for this operand. */ + int n_chains; + /* 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]; +} operand_rr_info; + +/* A struct to hold a vector of operand_rr_info structures describing the + operands of an insn. */ +typedef struct +{ + operand_rr_info *op_info; +} insn_rr_info; + +DEF_VEC_O (insn_rr_info); +DEF_VEC_ALLOC_O (insn_rr_info, heap); + +extern VEC(insn_rr_info, heap) *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_best_rename_reg (du_head_p, enum reg_class, HARD_REG_SET *, + int); +extern void regrename_do_replace (du_head_p, int); + +#endif |