diff options
| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-03-20 22:52:04 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-03-20 22:52:04 +0000 |
| commit | c1daa18066c5bb9fed737d9c5ae39b0f43b2782d (patch) | |
| tree | c72f960fd860511bb5a9ff145b513ffeded56927 /gcc/regmove.c | |
| parent | c931f2f0565cf3b6a9fe8cd24a95feb6218aef92 (diff) | |
| download | gcc-c1daa18066c5bb9fed737d9c5ae39b0f43b2782d.tar.gz | |
* 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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32654 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/regmove.c')
| -rw-r--r-- | gcc/regmove.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/gcc/regmove.c b/gcc/regmove.c index fa82f8f95e9..8e59c69ce77 100644 --- a/gcc/regmove.c +++ b/gcc/regmove.c @@ -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)) |