https://gcc.gnu.org/g:f80829a9f98c99e751bc2b80cffbe599a117f430
commit r16-5952-gf80829a9f98c99e751bc2b80cffbe599a117f430 Author: H.J. Lu <[email protected]> Date: Mon Dec 8 13:29:59 2025 +0800 x86: Don't allow 2 volatile memory references Don't allow 2 volatile memory references in *<avx512>_cmp<mode>3_dup_op so that gcc.target/i386/avx2-vpcmpeqq-1.c will generate 2 loads when -march=cascadelake is used. PR target/122343 * config/i386/sse.md (*<avx512>_cmp<mode>3_dup_op): Don't allow 2 volatile memory references. Signed-off-by: H.J. Lu <[email protected]> Diff: --- gcc/config/i386/sse.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index 0be898c789ed..fb79b2e67df3 100644 --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -4900,7 +4900,8 @@ (match_operand:SI 3 "<cmp_imm_predicate>")] UNSPEC_PCMP_ITER))] "TARGET_AVX512F && ix86_pre_reload_split () - && rtx_equal_p (operands[1], operands[2])" + && rtx_equal_p (operands[1], operands[2]) + && (!MEM_P (operands[1]) || !MEM_VOLATILE_P (operands[1]))" "#" "&& 1" [(set (match_dup 0) (match_dup 4))]
