From a161d435a10c24b5e94eecf428202fd77369f28a Mon Sep 17 00:00:00 2001 From: zack Date: Sun, 16 Jan 2000 17:53:02 +0000 Subject: * 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 --- gcc/config/i386/i386.md | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'gcc/config/i386') 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. -- cgit v1.2.1