Regressions on 4.6 at revision 193772 vs revision 193113

[H.J. Lu Intel64]

New failures:
FAIL: 23_containers/vector/bool/modifiers/insert/31370.cc execution test
FAIL: PR12350 compilation from source
FAIL: PR12416 compilation from source
FAIL: err14 -O3 compilation from source
FAIL: err2 -O3 compilation from source
FAIL: err2 compilation from source
FAIL: g++.dg/debug/debug4.C -gdwarf-2 -g1 (test for excess errors)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_0.o-cp_lto_20081119_1.o link, -O2 -flto -flto-partition=1to1 
FAIL: g++.dg/torture/pr34235.C  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: g++.dg/torture/pr34235.C  -O3 -fomit-frame-pointer  execution test
FAIL: gcc.c-torture/compile/20050622-1.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: gcc.c-torture/compile/20050622-1.c  -O3 -g  (test for excess errors)
FAIL: gcc.dg/graphite/block-4.c execution test
FAIL: gcc.dg/graphite/interchange-1.c execution test
FAIL: gcc.dg/graphite/interchange-11.c execution test
FAIL: gcc.dg/torture/builtin-math-2.c  -Os  (test for excess errors)
FAIL: gfortran.fortran-torture/execute/stack_varsize.f90 execution,  -O0 
FAIL: libgomp.c++/copyin-2.C  -Os  (test for excess errors)
FAIL: libgomp.c++/copyin-2.C  -Os  execution test
FAIL: libgomp.c++/for-6.C  -O3 -fomit-frame-pointer -funroll-loops  (test for excess errors)
FAIL: libgomp.c++/for-6.C  -O3 -fomit-frame-pointer -funroll-loops  execution test
FAIL: libgomp.fortran/strassen.f90  -O  execution test
FAIL: pr13107 -O3 compilation from source

New passes: