Regressions on master at commit r15-6913 vs commit r15-6911 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-6913 vs commit r15-6911 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.target/i386/pr105493.c scan-tree-dump-times slp1 "  MEM 
<vector\\(4\\) unsigned int> \\[[^]]*\\] = " 4