https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116065
Bug ID: 116065
Summary: [13/14/15 Regression] Function attribute optimize()
might make ISA target attribute broken
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: haochen.jiang at intel dot com
Target Milestone: ---
When we compiled the code following:
#include <immintrin.h>
__m256 a[10], b[10], c[10];
void __attribute__((target ("avx"), optimize(3)))
bar (void)
{
a[0] = _mm256_and_ps (b[0], c[0]);
}
with -O0 -msse -mno-avx, it will report ABI warning and target option mismatch.
-O1 will also fail, -O2 would be ok. It failed since GCC13.1.
Original testcase: https://godbolt.org/z/YbPKen7P5
I tested with different combinations, -O0/-O1 will only work with optimize(0/1)
and -O2/-O3 will only work with optimize(2/3). Otherwise, it will fail.
Also, if we put optimize() before target attribute, it will always pass.
