Regressions on trunk at revision 206050 vs revision 206039

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: 17_intro/headers/c++200x/stdc++.cc (test for excess errors)
FAIL: 17_intro/headers/c++200x/stdc++.cc (test for excess errors)
FAIL: 17_intro/headers/c++200x/stdc++_multiple_inclusion.cc (test for excess errors)
FAIL: 17_intro/headers/c++200x/stdc++_multiple_inclusion.cc (test for excess errors)
FAIL: g++.dg/ipa/devirt-13.C -std=gnu++11  scan-ipa-dump cgraph "Devirtualizing call"
FAIL: g++.dg/ipa/devirt-13.C -std=gnu++11  scan-ipa-dump cgraph "Devirtualizing call"
FAIL: g++.dg/ipa/devirt-13.C -std=gnu++98  scan-ipa-dump cgraph "Devirtualizing call"
FAIL: g++.dg/ipa/devirt-13.C -std=gnu++98  scan-ipa-dump cgraph "Devirtualizing call"
FAIL: g++.dg/opt/devirt2.C -std=gnu++11  scan-assembler-times xyzzy 2
FAIL: g++.dg/opt/devirt2.C -std=gnu++11  scan-assembler-times xyzzy 2
FAIL: g++.dg/opt/devirt2.C -std=gnu++98  scan-assembler-times xyzzy 2
FAIL: g++.dg/opt/devirt2.C -std=gnu++98  scan-assembler-times xyzzy 2

New passes:
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O1  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O2  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -O3 -g  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (internal compiler error)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (test for excess errors)
FAIL: c-c++-common/ubsan/overflow-2.c  -Os  (test for excess errors)