Regressions on native/master at commit r15-774 vs commit r15-773 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-774 vs commit r15-773 on Linux/x86_64
New failures:

New passes:
FAIL: libgomp.c++/../libgomp.c-c++-common/for-5.c execution test