Regressions on trunk at revision 244215 vs revision 244209

[H.J. Lu ia32 -fpic]

New failures:
FAIL: gcc.dg/tree-ssa/builtin-snprintf-warn-1.c  (test for warnings, line 36)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-warn-1.c  (test for warnings, line 62)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-warn-1.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-warn-2.c  (test for warnings, line 36)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-warn-2.c  (test for warnings, line 61)
FAIL: gcc.dg/tree-ssa/builtin-snprintf-warn-2.c (test for excess errors)

New passes: