Regressions on master at commit r15-2402 vs commit r15-2395 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-2402 vs commit r15-2395 on Linux/x86_64
New failures:

New passes:
FAIL: gfortran.dg/compiler-directive_2.f   -O   (test for errors, line 8)
FAIL: gfortran.dg/compiler-directive_2.f   -O  (test for excess errors)