Regressions on master at commit r12-3984 vs commit r12-3972 on Linux/x86_64

[H.J. Lu]

New failures:

New passes:
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O0 -g3 "-DGEN_ARGS=-p0\ --omit-rbp-clobbers" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O0 -g3 "-DGEN_ARGS=-p1\ --omit-rbp-clobbers" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O0 -g3 "-DGEN_ARGS=-p5\ --omit-rbp-clobbers" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O2 "-DGEN_ARGS=-p0" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O2 "-DGEN_ARGS=-p1" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O2 "-DGEN_ARGS=-p5" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c  -O0 -g3 "-DGEN_ARGS=-p0\ --omit-rbp-clobbers" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c  -O0 -g3 "-DGEN_ARGS=-p1\ --omit-rbp-clobbers" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c  -O0 -g3 "-DGEN_ARGS=-p5\ --omit-rbp-clobbers" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c  -O2 "-DGEN_ARGS=-p0" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c  -O2 "-DGEN_ARGS=-p1" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c  -O2 "-DGEN_ARGS=-p5" (test for excess errors)