Regressions on trunk at revision 187001 vs revision 186998

[H.J. Lu Intel64 LTO/FDO]

New failures:

New passes:
FAIL: gcc.dg/pch/save-temps-1.c  -O0 -g assembly comparison
FAIL: gcc.target/i386/bmi2-mulx32-1a.c scan-assembler-times bmi2_umulsidi3_1 1
FAIL: gcc.target/i386/bmi2-mulx32-2a.c scan-assembler-times mulx[ \\t]+[^\n]* 1