Regressions on master at commit r17-2697 vs commit r17-2692 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r17-2697 vs commit r17-2692 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.target/i386/pr50038.c scan-assembler-times movzbl 2