Regressions on native/master at commit r17-2435 vs commit r17-2431 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r17-2435 vs commit r17-2431 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.target/i386/zext-sse-1.c check-function-bodies func1
FAIL: gcc.target/i386/zext-sse-1.c check-function-bodies func2