Regressions on native/master at commit r15-3950 vs commit r15-3946 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-3950 vs commit r15-3946 on Linux/x86_64
New failures:

New passes:
FAIL: gfortran.dg/initialization_25.f90   -O   xfail *-*-*  (test for errors, 
line 11)
FAIL: gfortran.dg/initialization_25.f90   -O   xfail *-*-*  (test for errors, 
line 11)