Regressions on native/master at commit r15-1752 vs commit r15-1744 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-1752 vs commit r15-1744 on Linux/x86_64
New failures:

New passes:
FAIL: libgomp.fortran/examples-4/teams-4.f90   -O1  execution test