re PR target/76342 (AVX512: _mm512_undefined_epi32() intrinsic missing (incorrectly named _mm512_undefined_si512))

	PR target/76342
	* config/i386/avx512fintrin.h (_mm512_undefined_epi32):
	Renamed from _mm512_undefined_si512.
	(_mm_undefined_si512): New definition.

testsuite/ChangeLog:

	PR target/76342
	* gcc.target/i386/pr76342.c: New test.

From-SVN: r239453