Regressions on master at commit r15-1958 vs commit r15-1953 on Linux/i686

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-1958 vs commit r15-1953 on Linux/i686
New failures:

New passes:
FAIL: gcc.target/i386/avx512vl-vpmovusdb-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpmovusdw-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpmovuswb-2.c execution test