Regressions on native/master at commit r16-5947 vs commit r16-5946 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r16-5947 vs commit r16-5946 on Linux/x86_64
New failures:
FAIL: gcc.target/i386/avx2-vpcmpeqq-1.c scan-assembler vpcmpeqq[ \\t]+[^\n]*%ymm[0-9]
FAIL: gcc.target/i386/avx2-vpcmpeqq-1.c scan-assembler vpcmpeqq[ \\t]+[^\n]*%ymm[0-9]
FAIL: gcc.target/i386/avx2-vpcmpgtq-1.c scan-assembler vpcmpgtq[ \\t]+[^\n]*%ymm[0-9]
FAIL: gcc.target/i386/avx2-vpcmpgtq-1.c scan-assembler vpcmpgtq[ \\t]+[^\n]*%ymm[0-9]

New passes: