Regressions on trunk at revision 263613 vs revision 263576

[H.J. Lu (ia32)]

New failures:
FAIL: gcc.dg/tree-ssa/builtin-sprintf-10.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c  (test for warnings, line 120)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c  (test for warnings, line 122)

New passes:
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c  (test for warnings, line 119)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c  (test for warnings, line 121)