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(reg_equiv_replacement): New variable.

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(memref_referenced_p, case REG): Check for reg_equiv_replacement.
(update_equiv_regs): reg_equiv_replacement now file-scope.

From-SVN: r10930
This commit is contained in:
Richard Kenner 1996-01-01 18:23:33 -05:00
parent 54630035ff
commit c25a4c251b
1 changed files with 12 additions and 3 deletions
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15
gcc/local-alloc.c
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@ -1,5 +1,5 @@
/* Allocate registers within a basic block, for GNU compiler.
Copyright (C) 1987, 88, 91, 93, 94, 1995 Free Software Foundation, Inc.
Copyright (C) 1987, 88, 91, 93, 94, 95, 1996 Free Software Foundation, Inc.
This file is part of GNU CC.
@ -235,6 +235,10 @@ static int scratch_index;
static int this_insn_number;
static rtx this_insn;
/* Used to communicate changes made by update_equiv_regs to
memref_referenced_p. */
static rtx *reg_equiv_replacement;
static void alloc_qty PROTO((int, enum machine_mode, int, int));
static void alloc_qty_for_scratch PROTO((rtx, int, rtx, int, int));
static void validate_equiv_mem_from_store PROTO((rtx, rtx));
@ -609,7 +613,6 @@ memref_referenced_p (memref, x)
switch (code)
{
case REG:
case CONST_INT:
case CONST:
case LABEL_REF:
@ -621,6 +624,11 @@ memref_referenced_p (memref, x)
case LO_SUM:
return 0;
case REG:
return (reg_equiv_replacement[REGNO (x)] == 0
|| memref_referenced_p (memref,
reg_equiv_replacement[REGNO (x)]));
case MEM:
if (true_dependence (memref, x))
return 1;
@ -941,9 +949,10 @@ static void
update_equiv_regs ()
{
rtx *reg_equiv_init_insn = (rtx *) alloca (max_regno * sizeof (rtx *));
rtx *reg_equiv_replacement = (rtx *) alloca (max_regno * sizeof (rtx *));
rtx insn;
reg_equiv_replacement = (rtx *) alloca (max_regno * sizeof (rtx *));
bzero ((char *) reg_equiv_init_insn, max_regno * sizeof (rtx *));
bzero ((char *) reg_equiv_replacement, max_regno * sizeof (rtx *));