Regressions on trunk at revision 189825 vs revision 189821

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

New failures:
FAIL: gcc.dg/pr46522.c (internal compiler error)
FAIL: gcc.dg/pr46522.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 (test for excess errors)

New passes:
FAIL: gcc.dg/pr45352-3.c (internal compiler error)
FAIL: gcc.dg/pr45352-3.c (test for excess errors)