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| author | H.J. Lu <hjl.tools@gmail.com> | 2025-12-08 13:29:59 +0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2025-12-08 15:17:40 +0800 |
| commit | f80829a9f98c99e751bc2b80cffbe599a117f430 (patch) | |
| tree | f2f58837e51eae9a6c1754a93730c2fb0db64321 | |
| parent | 886a4bd0fee470e345e73d2ba5c968d5d7dc2ca9 (diff) | |
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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 <hjl.tools@gmail.com>
| -rw-r--r-- | gcc/config/i386/sse.md | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index 0be898c..fb79b2e 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))] |