Regressions on master at commit r15-4503 vs commit r15-4497 on Linux/i686

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-4503 vs commit r15-4497 on Linux/i686
New failures:

New passes:
FAIL: gfortran.dg/unsigned_38.f90   -O  (test for excess errors)