Regressions on trunk at revision 189821 vs revision 189820

[H.J. Lu Intel64 Core 2/i7]

New failures:
FAIL: gcc.dg/pr46521.c (internal compiler error)
FAIL: gcc.dg/pr46521.c (test for excess errors)
FAIL: gcc.dg/pr48144.c (internal compiler error)
FAIL: gcc.dg/pr48144.c (test for excess errors)
FAIL: gcc.dg/tree-prof/pr50907.c compilation,  -fprofile-generate -D_PROFILE_GENERATE (internal compiler error)
FAIL: gcc.target/i386/pr45352-2.c (internal compiler error)
FAIL: gcc.target/i386/pr45352-2.c (test for excess errors)

New passes:
FAIL: g++.dg/opt/pr46640.C -std=gnu++11 (internal compiler error)
FAIL: g++.dg/opt/pr46640.C -std=gnu++11 (test for excess errors)
FAIL: gcc.dg/pr45652.c (internal compiler error)
FAIL: gcc.dg/pr45652.c (test for excess errors)
FAIL: gcc.dg/pr51557.c (internal compiler error)
FAIL: gcc.dg/pr51557.c (test for excess errors)
FAIL: gcc.target/i386/pr45352-1.c (internal compiler error)
FAIL: gcc.target/i386/pr45352-1.c (internal compiler error)
FAIL: gcc.target/i386/pr45352-1.c (test for excess errors)
FAIL: gcc.target/i386/pr45352-1.c (test for excess errors)
FAIL: gfortran.dg/pr42294.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr42294.f  -O  (test for excess errors)
FAIL: gfortran.dg/pr44691.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr44691.f  -O  (test for excess errors)