https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115418
Hongtao Liu <liuhongt at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |liuhongt at gcc dot gnu.org
--- Comment #3 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> Note the issue is ix86_expand_sse_fp_minmax only handles LT/UNGE but it
> should handle GT/UNLT with both parts swapped (comparison and true/false).
>
GT/UNLT is "canonicalized" to GT/UNGT in ix86_prepare_sse_fp_compare_args
4410 case GE:
4411 case GT:
4412 case UNLE:
4413 case UNLT:
4414 /* These are not supported directly before AVX, and furthermore
4415 ix86_expand_sse_fp_minmax only optimizes LT/UNGE. Swap the
4416 comparison operands to transform into something that is
4417 supported. */
4418 std::swap (*pop0, *pop1);
4419 code = swap_condition (code);
