Regressions on trunk at revision 267226 vs revision 267196

[H.J. Lu (Intel64)]

New failures:

New passes:
FAIL: gcc.dg/pr79342.c (internal compiler error)
FAIL: gcc.dg/pr79342.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-4.c scan-tree-dump-times optimized " = snprintf" 12
FAIL: gcc.dg/tree-ssa/builtin-snprintf-4.c scan-tree-dump-times optimized " = vsnprintf" 12
FAIL: gcc.dg/tree-ssa/builtin-snprintf-4.c  (test for warnings, line 106)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-4.c  (test for warnings, line 128)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-4.c  (test for warnings, line 74)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-4.c  (test for warnings, line 87)