https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107825
Bug ID: 107825
Summary: uninitialized variable warning in immintrin.h with
skylake architecture
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: bill.trost at harmonicinc dot com
Target Milestone: ---
Created attachment 53948
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53948&action=edit
Error mesages generated by compiling the program using the indicated flags
The following program generates warnings about uninitialized parameters in
avx512fintrin.h.
#include <immintrin.h>
__m512 f(__m512i a)
{
return _mm512_cvtepi32_ps(a);
}
// Compiler used: x86-64 gcc 12.2
// Options used: -O3 -Wall -Werror -march=skylake-avx512
Warnings are attached, but in summary, the value _mm512_undefined_ps() passed
to __builtin_ia32_cvtdq2ps512_mask is deliberately uninitialized.
