Regressions on trunk at revision 176958 vs revision 176957

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: gcc.c-torture/execute/builtins/strstr-asm.c compilation,  -O2 -flto -flto-ptest -d plugin || mkdir plugin
WARNING: program timed out.

New passes:
FAIL: gcc.c-torture/execute/builtins/strstr-asm.c compilation,  -O2 -flto -flto-partition=none 
FAIL: libgomp.graphite/force-parallel-1.c execution test