Regressions on trunk at revision 266743 vs revision 266736

[H.J. Lu (ia32 Core i7)]

New failures:
FAIL: gcc.dg/dfp/fe-binop.c execution test
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c second (test for warnings, line 120)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c second (test for warnings, line 122)

New passes:
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)