46c5ad278b
* sbitmap.c: Convert prototypes to ISO C90. * sbitmap.h: Likewise. * scan-decls.c: Likewise. * scan.c: Likewise. * sched-deps.c: Likewise. * sched-ebb.c: Likewise. * sched-int.h: Likewise. * sched-rgn.c: Likewise. * sched-vis.c: Likewise. * sibcall.c: Likewise. * simplify-rtx.c: Likewise. * sreal.c: Likewise. * sreal.h: Likewise. * ssa-ccp.c: Likewise. * ssa-dce.c: Likewise. * ssa.c: Likewise. * ssa.h: Likewise. * stack.h: Likewise. * stmt.c: Likewise. * stor-layout.c: Likewise. * stringpool.c: Likewise. * target.h: Likewise. * timevar.c: Likewise. * timevar.h: Likewise. * tlink.c: Likewise. * tracer.c: Likewise. * tree-inline.c: Likewise. * tree-inline.h: Likewise. * tree.c: Likewise. * tree.h: Likewise. From-SVN: r69002
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/* Static Single Assignment (SSA) definitions for GCC
|
|
Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
|
|
Written by Jeffrey D. Oldham <oldham@codesourcery.com>.
|
|
|
|
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 2, 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 COPYING. If not, write to the Free
|
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
|
|
02111-1307, USA. */
|
|
|
|
|
|
/* Main SSA routines. */
|
|
extern void convert_to_ssa (void);
|
|
extern void convert_from_ssa (void);
|
|
typedef int (*successor_phi_fn) (rtx, int, int, void *);
|
|
extern int for_each_successor_phi (basic_block bb, successor_phi_fn,
|
|
void *);
|
|
void compute_dominance_frontiers (sbitmap *frontiers, dominance_info idom);
|
|
extern int remove_phi_alternative (rtx, basic_block);
|
|
|
|
|
|
/* Optimizations. */
|
|
/* In ssa-dce.c */
|
|
extern void ssa_eliminate_dead_code (void);
|
|
|
|
/* In ssa-ccp.c */
|
|
extern void ssa_const_prop (void);
|
|
|
|
|
|
/* SSA definitions and uses. */
|
|
/* This flag is set when the CFG is in SSA form. */
|
|
extern int in_ssa_form;
|
|
|
|
/* Element I is the single instruction that sets register I. */
|
|
extern GTY(()) varray_type ssa_definition;
|
|
|
|
/* Element I is an INSN_LIST of instructions that use register I. */
|
|
extern varray_type ssa_uses;
|
|
|
|
|
|
/* Specify which hard registers should be converted. */
|
|
|
|
/* All pseudo-registers (having register number >=
|
|
FIRST_PSEUDO_REGISTER) and hard registers satisfying
|
|
CONVERT_HARD_REGISTER_TO_SSA_P are converted to SSA form. */
|
|
|
|
/* Given a hard register number REG_NO, return nonzero if and only if
|
|
the register should be converted to SSA. */
|
|
|
|
#ifndef CONVERT_HARD_REGISTER_TO_SSA_P
|
|
#define CONVERT_HARD_REGISTER_TO_SSA_P(REG_NO) (0) /* default of no hard registers */
|
|
#endif /* CONVERT_HARD_REGISTER_TO_SSA_P */
|
|
|
|
/* Given a register number REG_NO, return nonzero if and only if the
|
|
register should be converted to SSA. */
|
|
|
|
#define CONVERT_REGISTER_TO_SSA_P(REG_NO) \
|
|
((!HARD_REGISTER_NUM_P (REG_NO)) || \
|
|
(CONVERT_HARD_REGISTER_TO_SSA_P (REG_NO)))
|