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. -- H.J.
From 858c0e212162c832cdb3e6c2b56a76df03a5795b Mon Sep 17 00:00:00 2001 From: "H.J. Lu" <[email protected]> Date: Mon, 8 Dec 2025 13:29:59 +0800 Subject: [PATCH] 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]> --- 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 0be898c789e..fb79b2e67df 100644 --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -4900,7 +4900,8 @@ (define_insn_and_split "*<avx512>_cmp<mode>3_dup_op" (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))] -- 2.52.0
