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| author | Uros Bizjak <ubizjak@gmail.com> | 2022-09-01 20:20:06 +0200 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2022-09-01 20:20:43 +0200 |
| commit | 5205f5b54ad769969ffd89978ba1bcee41380bf8 (patch) | |
| tree | 0fc3e9ec207c7dd65d2f14c452f0805e16ea4701 /gcc/config | |
| parent | bb17c5030dc47c69c700e0fd0145285dc8f913a2 (diff) | |
| download | gcc-5205f5b54ad769969ffd89978ba1bcee41380bf8.zip gcc-5205f5b54ad769969ffd89978ba1bcee41380bf8.tar.gz gcc-5205f5b54ad769969ffd89978ba1bcee41380bf8.tar.bz2 | |
i386: Fix conversion of move to/from AX_REG into xchg [PR106707]
The conversion of a move pattern where both operands are AX_REG
should be prevented.
2022-09-01 Uroš Bizjak <ubizjak@gmail.com>
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.
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.md | 4 |
1 files changed, 2 insertions, 2 deletions
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)) |