https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115748
Bug ID: 115748
Summary: [15 Regression] gcc.target/i386/avx512bw-pr70509.c
SIGILL with -m32
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
On a non-AVX512 machine some of the avx512bw tests FAIL as we seem to use kmov
in the cpu detection code:
Program received signal SIGILL, Illegal instruction.
0x080491eb in __get_cpuid_count (__leaf=7, __subleaf=0,
__eax=<synthetic pointer>, __ebx=<synthetic pointer>,
__ecx=<synthetic pointer>, __edx=<synthetic pointer>)
at /home/rguenther/obj/gcc/include/cpuid.h:346
346 __cpuid_count (__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
(gdb) disassemble
...
0x080491df <+46>: mov $0x7,%eax
0x080491e4 <+51>: mov $0x0,%ecx
0x080491e9 <+56>: cpuid
=> 0x080491eb <+58>: kmovd %ebx,%k0
0x080491ef <+62>: mov $0x1,%eax
0x080491f4 <+67>: mov $0x0,%ebx
this is in avx512-check.h which contains main that's compiled with flags
assuming there's no incentive to use any non-base x86-64 ISA.
