Regressions on master at commit r12-5897 vs commit r12-5883 on Linux/x86_64

[H.J. Lu]

New failures:

New passes:
FAIL: compiler driver --help=param option(s): "^ +-.*[^:.]$" absent from output: "  --param=max-inline-functions-called-once-loop-depth= Maximum loop depth of a call which is considered for inlining functions called once"
FAIL: compiler driver --help=param option(s): "^ +-.*[^:.]$" absent from output: "  --param=max-inline-functions-called-once-loop-depth= Maximum loop depth of a call which is considered for inlining functions called once"
FAIL: compiler driver --help=param option(s): "^ +-.*[^:.]$" absent from output: "  --param=max-inline-functions-called-once-loop-depth= Maximum loop depth of a call which is considered for inlining functions called once"
FAIL: compiler driver --help=params option(s): "[^.]$" absent from output: "e"
FAIL: compiler driver --help=params option(s): "[^.]$" absent from output: "e"
FAIL: compiler driver --help=params option(s): "[^.]$" absent from output: "e"
FAIL: gcc.dg/guality/pr36728-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  -DPREVENT_OPTIMIZATION line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  -DPREVENT_OPTIMIZATION line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c   -O3 -g  -DPREVENT_OPTIMIZATION  line 16 y == 2
FAIL: g++.dg/warn/string1.C    (test for warnings, line 17)
FAIL: g++.dg/warn/string1.C    (test for warnings, line 17)
FAIL: g++.dg/warn/string1.C    (test for warnings, line 17)