Regressions on trunk at revision 182605 vs revision 182603

[H.J. Lu Intel64 Core 2/i7]

New failures:
FAIL: 27_io/basic_istream/extractors_arithmetic/char/dr696.cc execution test
FAIL: 27_io/basic_istream/extractors_arithmetic/wchar_t/dr696.cc execution test
FAIL: 27_io/basic_ostream/inserters_arithmetic/char/7.cc execution test
FAIL: 27_io/basic_ostream/inserters_arithmetic/wchar_t/7.cc execution test

New passes:
FAIL: gcc.dg/pr50038.c scan-assembler-times movzbl 2