Regressions on trunk at revision 191871 vs revision 191869

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

New failures:

New passes:
FAIL: gcc.dg/torture/pr51106-2.c  -O0   (test for warnings, line 8)
FAIL: gcc.dg/torture/pr51106-2.c  -O1   (test for warnings, line 8)
FAIL: gcc.dg/torture/pr51106-2.c  -O2   (test for warnings, line 8)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none   (test for warnings, line 8)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -fomit-frame-pointer   (test for warnings, line 8)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -g   (test for warnings, line 8)
FAIL: gcc.dg/torture/pr51106-2.c  -Os   (test for warnings, line 8)
FAIL: gcc.dg/ucnid-8.c (test for excess errors)
FAIL: gcc.dg/ucnid-8.c UCN diag (test for warnings, line 14)