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| author | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-01-16 17:53:02 +0000 |
|---|---|---|
| committer | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-01-16 17:53:02 +0000 |
| commit | a161d435a10c24b5e94eecf428202fd77369f28a (patch) | |
| tree | 124fb7970fc89356797acbecf335d2f905cf4595 /gcc/config/i386 | |
| parent | e1ddff7076cf9eba3d4b0c73d84233c34803a814 (diff) | |
| download | gcc-a161d435a10c24b5e94eecf428202fd77369f28a.tar.gz | |
* config/i386/i386.md: Add peephole to merge successive stack
adjusts.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@31443 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/i386')
| -rw-r--r-- | gcc/config/i386/i386.md | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 2f7aa6ab140..c7b01819a43 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -8947,6 +8947,25 @@ [(parallel [(set (match_dup 0) (ashift:SI (match_dup 0) (match_dup 2))) (clobber (reg:CC 17))])] "operands[2] = GEN_INT (exact_log2 (INTVAL (operands[1])));") + +;; Merge two successive stack adjusts. The combiner doesn't know how +;; to do this, and doesn't see all of them. +;; (reg:SI 7) is %esp. +(define_peephole2 + [(parallel[ + (set (reg:SI 7) + (plus:SI (reg:SI 7) (match_operand:SI 0 "const_int_operand" ""))) + (clobber (reg:CC 17))]) + (parallel[ + (set (reg:SI 7) + (plus:SI (reg:SI 7) (match_operand:SI 1 "const_int_operand" ""))) + (clobber (reg:CC 17))])] + "" + [(parallel[ + (set (reg:SI 7) + (plus:SI (reg:SI 7) (match_dup 2))) + (clobber (reg:CC 17))])] + "operands[2] = GEN_INT (INTVAL (operands[0]) + INTVAL (operands[1]));") ;; Call-value patterns last so that the wildcard operand does not ;; disrupt insn-recog's switch tables. |