From 5205f5b54ad769969ffd89978ba1bcee41380bf8 Mon Sep 17 00:00:00 2001 From: Uros Bizjak Date: Thu, 1 Sep 2022 20:20:06 +0200 Subject: i386: Fix conversion of move to/from AX_REG into xchg [PR106707] MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The conversion of a move pattern where both operands are AX_REG should be prevented. 2022-09-01 Uroš Bizjak gcc/ChangeLog: PR target/106707 * config/i386/i386.md (moves to/from AX_REG into xchg peephole2): Do not convert a move pattern where both operands are AX_REG. gcc/testsuite/ChangeLog: PR target/106707 * gcc.target/i386/pr106707.c: New test. --- gcc/config/i386/i386.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'gcc/config') diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index a4a18cf..1aef1af 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -3043,8 +3043,8 @@ [(set (match_operand:SWI48 0 "general_reg_operand") (match_operand:SWI48 1 "general_reg_operand"))] "optimize_size > 1 - && (REGNO (operands[0]) == AX_REG - || REGNO (operands[1]) == AX_REG) + && ((REGNO (operands[0]) == AX_REG) + != (REGNO (operands[1]) == AX_REG)) && optimize_insn_for_size_p () && peep2_reg_dead_p (1, operands[1])" [(parallel [(set (match_dup 0) (match_dup 1)) -- cgit v1.1