https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118067
--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Uros Bizjak <u...@gcc.gnu.org>: https://gcc.gnu.org/g:94338cdf59531edb9ac944011c95d777b113ae93 commit r14-11227-g94338cdf59531edb9ac944011c95d777b113ae93 Author: Uros Bizjak <ubiz...@gmail.com> Date: Fri Dec 20 16:16:15 2024 +0100 i386: Disable SImode/DImode moves from/to mask regs without avx512bw [PR118067] SImode and DImode moves from/to mask registers are valid only with AVX512BW, so mark relevant alternatives in *movsi_internal and *movdi_internal as such. Even with the patch, the testcase still fails, but now with: pr118067.c: In function âfooâ: pr118067.c:13:1: internal compiler error: maximum number of generated reload insns per insn achieved (90) 13 | } | ^ 0x2c3b581 internal_error(char const*, ...) ../../git/gcc/gcc/diagnostic-global-context.cc:517 0xb68938 lra_constraints(bool) ../../git/gcc/gcc/lra-constraints.cc:5411 0xb51a0d lra(_IO_FILE*, int) ../../git/gcc/gcc/lra.cc:2449 0xaf9f4d do_reload ../../git/gcc/gcc/ira.cc:5977 0xafa462 execute ../../git/gcc/gcc/ira.cc:6165 PR target/118067 gcc/ChangeLog: * config/i386/i386.md (*movdi_internal): Disable alternatives from/to mask registers without AVX512BW. (*movsi_internal): Ditto. (cherry picked from commit 219ddae16f9d724baeff86934f8981aa5ef7b95f)