https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105593
Bug ID: 105593
Summary: avx512 math function raises uninitialized variable
warning
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: rogerio.souza at gmail dot com
Target Milestone: ---
When using avx512 math function we got the following warning:
/<gcc_path>/lib/gcc/x86_64-redhat-linux/12.1.0/include/avx512fintrin.h:6994:10:
error: '__Y' may be used uninitialized [-Werror=maybe-uninitialized]
The code that triggers the error is the one below, from file avx512fintrin.h:
202 extern __inline __m512i
203 __attribute__ ((__gnu_inline__, __always_inline__, __artificial__))
204 _mm512_undefined_epi32 (void)
205 {
206 __m512i __Y = __Y; // Uninitialized variable "__Y"
207 return __Y;
208 }
Should this code be reviewed?
Using "-Wno-uninitialized" prevents this warning from happening.
