https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112514
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Trying
2023-11-14 Jakub Jelinek <ja...@redhat.com>
* config/i386/i386.md (<insn><dwi>3_doubleword_lowpart): Move
operands[1] aka low part of input rather than operands[3] aka high
part of input to output if not the same register.
--- gcc/config/i386/i386.md.jj 2023-11-14 08:10:18.932549803 +0100
+++ gcc/config/i386/i386.md 2023-11-14 09:31:05.565019207 +0100
@@ -14825,8 +14825,8 @@ (define_insn_and_split "<insn><dwi>3_dou
{
split_double_mode (<DWI>mode, &operands[1], 1, &operands[1], &operands[3]);
operands[4] = GEN_INT ((<MODE_SIZE> * BITS_PER_UNIT) - INTVAL
(operands[2]));
- if (!rtx_equal_p (operands[0], operands[3]))
- emit_move_insn (operands[0], operands[3]);
+ if (!rtx_equal_p (operands[0], operands[1]))
+ emit_move_insn (operands[0], operands[1]);
})
(define_insn "x86_64_shrd"
now if it fixes this.
