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regmove.c (stack_memref_p): Fix typo, reorg for readability.

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* regmove.c (stack_memref_p): Fix typo, reorg for readability.
        (combine_stack_adjustments_for_block): Don't allow sp references
        in the side of a set we're not fixing up.
        * toplev.c (rest_of_compilation): Run combine_stack_adjustments
        after life_analysis.

From-SVN: r32654
This commit is contained in:
Richard Henderson 2000-03-20 14:52:04 -08:00 committed by Richard Henderson
parent e245d3af6f
commit 9e11785b7c
3 changed files with 32 additions and 15 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2000-03-20 Richard Henderson <rth@cygnus.com>
* regmove.c (stack_memref_p): Fix typo, reorg for readability.
(combine_stack_adjustments_for_block): Don't allow sp references
in the side of a set we're not fixing up.
* toplev.c (rest_of_compilation): Run combine_stack_adjustments
after life_analysis.
2000-03-20 Richard Henderson <rth@cygnus.com>
* calls.c (expand_call): Don't bother generating tail call

28
gcc/regmove.c
View File

@ -2116,14 +2116,21 @@ combine_stack_adjustments ()
/* Recognize a MEM of the form (sp) or (plus sp const). */
static int
stack_memref_p (mem)
rtx mem;
stack_memref_p (x)
rtx x;
{
return (GET_CODE (mem) == MEM
&& (XEXP (mem, 0) == stack_pointer_rtx
|| (GET_CODE (XEXP (mem, 0)) == PLUS
&& XEXP (XEXP (mem, 0), 0) == stack_pointer_rtx
&& GET_CODE (XEXP (XEXP (mem, 0), 0)) == CONST_INT)));
if (GET_CODE (x) != MEM)
return 0;
x = XEXP (x, 0);
if (x == stack_pointer_rtx)
return 1;
if (GET_CODE (x) == PLUS
&& XEXP (x, 0) == stack_pointer_rtx
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
return 1;
return 0;
}
/* Recognize either normal single_set or the hack in i386.md for
@ -2330,14 +2337,16 @@ combine_stack_adjustments_for_block (bb)
}
/* Find loads from stack memory and record them. */
if (last_sp_set && stack_memref_p (src))
if (last_sp_set && stack_memref_p (src)
&& ! reg_mentioned_p (stack_pointer_rtx, dest))
{
memlist = record_one_stack_memref (insn, src, memlist);
goto processed;
}
/* Find stores to stack memory and record them. */
if (last_sp_set && stack_memref_p (dest))
if (last_sp_set && stack_memref_p (dest)
&& ! reg_mentioned_p (stack_pointer_rtx, src))
{
memlist = record_one_stack_memref (insn, dest, memlist);
goto processed;
@ -2351,6 +2360,7 @@ combine_stack_adjustments_for_block (bb)
&& GET_CODE (dest) == MEM
&& GET_CODE (XEXP (dest, 0)) == PRE_DEC
&& XEXP (XEXP (dest, 0), 0) == stack_pointer_rtx
&& ! reg_mentioned_p (stack_pointer_rtx, src)
&& validate_change (insn, &SET_DEST (set),
change_address (dest, VOIDmode,
stack_pointer_rtx), 0))

11
gcc/toplev.c
View File

@ -3555,17 +3555,16 @@ rest_of_compilation (decl)
if (optimize)
{
TIMEVAR (flow2_time, { cleanup_cfg (insns); });
TIMEVAR (flow2_time,
{
cleanup_cfg (insns);
life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
});
#ifndef ACCUMULATE_OUTGOING_ARGS
TIMEVAR (flow2_time, { combine_stack_adjustments (); });
#endif
TIMEVAR (flow2_time,
{
life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
});
if (ggc_p)
ggc_collect ();
}