https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126697
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <[email protected]>: https://gcc.gnu.org/g:d0aa6740323e48d4b3743dc8fcd5c0ff552f86d1 commit r17-3274-gd0aa6740323e48d4b3743dc8fcd5c0ff552f86d1 Author: H.J. Lu <[email protected]> Date: Fri Aug 7 16:21:54 2026 +0800 x86: Update cpuid.h to pass leaf to __get_cpuid_max commit 44cc8e5718efd0cc1ef57c68052dbe33b047f158 Author: Ewan <[email protected]> Date: Tue Mar 17 16:12:15 2026 +0800 i386: Fix __get_cpuid() and __get_cpuid_count() for Centaur/Zhaoxin CPUID ra nge caused many regressions, like FAIL: gcc.dg/vect/vect-100.c scan-tree-dump-not optimized "Invalid sum" on Linux/x86-64 with -m32. The commit above changed __get_cpuid_count which is used by check_vect in tree-vect.h. When GCC tried to vectorize check_vect, it outputted __attribute__((noinline)) void check_vect () { ... ;; Invalid sum of incoming counts 966367640 (estimated locally, freq 0.9000), should be 719407024 (estimated locally, freq 0.6700) which failed /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */ Change __get_cpuid and __get_cpuid_count to pass the leaf argument directly to __get_cpuid_max and apply 0xC0000000 mask before passing it to CPUID. PR testsuite/126697 * config/i386/cpuid.h (__get_cpuid_max): Rename the first argument to __leaf and apply 0xC0000000 mask before passing it to CPUID. (__get_cpuid): Pass __leaf to __get_cpuid_max. (__get_cpuid_count): Likewise. Signed-off-by: H.J. Lu <[email protected]>
