Regressions on trunk at revision 193776 vs revision 193748

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: 23_containers/vector/bool/modifiers/insert/31370.cc execution test
FAIL: 27_io/basic_stringbuf/overflow/char/1.cc execution test
FAIL: 27_io/basic_stringbuf/overflow/wchar_t/1.cc execution test
FAIL: 28_regex/algorithms/regex_match/extended/cstring_plus.cc (test for excess errors)
FAIL: PR26858 compilation from source
FAIL: g++.dg/opt/pr30965.C -std=gnu++11 (test for excess errors)
FAIL: g++.old-deja/g++.other/headers1.C -std=c++98 (test for excess errors)
FAIL: gcc.c-torture/compile/20050622-1.c  -O0  (test for excess errors)
FAIL: gcc.c-torture/compile/20050622-1.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -O0  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -O1  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -O2  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: gcc.c-torture/compile/pr46534.c  -Os  (test for excess errors)
FAIL: gcc.c-torture/unsorted/dump-noaddr.c,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   -dumpbase dump1/dump-noaddr.c -DMASK=1 -x c --param ggc-min-heapsize=1 -fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
FAIL: gcc.c-torture/unsorted/dump-noaddr.c,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions   -dumpbase dump1/dump-noaddr.c -DMASK=1 -x c --param ggc-min-heapsize=1 -fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
FAIL: gcc.c-torture/unsorted/dump-noaddr.c,  -O3 -g   -dumpbase dump1/dump-noaddr.c -DMASK=1 -x c --param ggc-min-heapsize=1 -fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
FAIL: gcc.c-torture/unsorted/dump-noaddr.c,  -Og -g   -dumpbase dump1/dump-noaddr.c -DMASK=1 -x c --param ggc-min-heapsize=1 -fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
FAIL: gcc.c-torture/unsorted/dump-noaddr.c,  -Os   -dumpbase dump1/dump-noaddr.c -DMASK=1 -x c --param ggc-min-heapsize=1 -fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.000i.cgraph,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.000i.cgraph,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.000i.cgraph,  -O3 -g  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.000i.cgraph,  -Og -g  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.000i.cgraph,  -Os  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.243t.statistics,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.243t.statistics,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.243t.statistics,  -O3 -g  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.243t.statistics,  -Og -g  comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.243t.statistics,  -Os  comparison
FAIL: gcc.dg/plugin/selfassign.c compilation
FAIL: gfortran.dg/quad_2.f90  -O0  execution test
FAIL: gfortran.dg/quad_2.f90  -O1  execution test
FAIL: gfortran.dg/quad_2.f90  -O2  execution test
FAIL: gfortran.dg/quad_2.f90  -O3 -fomit-frame-pointer  execution test
FAIL: gfortran.dg/quad_2.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  execution test
FAIL: gfortran.dg/quad_2.f90  -O3 -fomit-frame-pointer -funroll-loops  execution test
FAIL: gfortran.dg/quad_2.f90  -O3 -g  execution test
FAIL: gfortran.dg/quad_2.f90  -Os  execution test
FAIL: libgomp.c++/for-6.C  -O2  execution test
FAIL: tmpdir-g++.dg-struct-layout-1/t027 cp_compat_y_tst.o compile

New passes: