Regressions on native/master at commit r15-2051 vs commit r15-2047 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-2051 vs commit r15-2047 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.target/i386/ashldi3-1.c scan-assembler-times xorl 2
FAIL: gcc.target/i386/pr31985.c scan-assembler-times movl 4