https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123216
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <[email protected]>: https://gcc.gnu.org/g:d91fa5f258a62488abfed07dad608160e0a40d29 commit r16-6309-gd91fa5f258a62488abfed07dad608160e0a40d29 Author: Jakub Jelinek <[email protected]> Date: Sat Dec 20 11:59:19 2025 +0100 i386: Fix up handling of some -mno-avx512* options [PR123216] This PR is about -mavx10.2 -mno-avx512vl ICE on some builtin. Though, because -mavx10.2 implies -mavx512vl (among many others), the pattern is right and doesn't need to care about such weird cases. What is wrong is the handling of -mno-avx512vl and various other options, that should unset -mavx10.1 and that should unset -mavx10.2, but it doesn't. I went through various ISAs which 10.1 or 10.2 implies, looking for the ISA{,2}_*_SET and corresponding ISA{,2}_*_UNSET macros and their use or lack thereof. Here is what I found. OPTION_MASK_ISA_AVX512FP16_UNSET has been incorrectly defined (avx512fp16 implies avx512bw, not the other way around), but fortunately wasn't used. And then various ISAs implied by -mavx10.1 (except for -mavx512f which was correct) missed clearing -mavx10.{1,2} on -mno-* handling. As mentioned in the PR, it would be really nice to add some verification of the set and unset macros to verify consistency. 2025-12-20 Jakub Jelinek <[email protected]> PR target/123216 * common/config/i386/i386-common.cc (OPTION_MASK_ISA_AVX512FP16_UNSET): Remove unused macro. (OPTION_MASK_ISA2_AVX512FP16_UNSET, OPTION_MASK_ISA2_AVX512BF16_UNSET, OPTION_MASK_ISA2_AVX512BW_UNSET): Or in OPTION_MASK_ISA2_AVX10_1_UNSET. (OPTION_MASK_ISA2_AVX512CD_UNSET, OPTION_MASK_ISA2_AVX512DQ_UNSET, OPTION_MASK_ISA2_AVX512VL_UNSET, OPTION_MASK_ISA2_AVX512IFMA_UNSET, OPTION_MASK_ISA2_AVX512VNNI_UNSET, OPTION_MASK_ISA2_AVX512VPOPCNTDQ_UNSET, OPTION_MASK_ISA2_AVX512VBMI_UNSET, OPTION_MASK_ISA2_AVX512VBMI2_UNSET, OPTION_MASK_ISA2_AVX512BITALG_UNSET): Define. (ix86_handle_option): For -mno-avx512{cd,dq,vl,ifma,vnni,vpopcntdq,vbmi,vbmi2,bitalg} also remove corresponding OPTION_MASK_ISA2_AVX512*_UNSET from ix86_isa_flags2 and add it to ix86_isa_flags2_explicit.
