Regressions on trunk at revision 169049 vs revision 169035

[H.J. Lu Intel64-bootstrap-lto]

New failures:
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.target/i386/headmerge-1.c scan-assembler-times 120 1
FAIL: gcc.target/i386/headmerge-1.c scan-assembler-times 120 1
FAIL: gcc.target/i386/headmerge-2.c scan-assembler-times 120 1
FAIL: gcc.target/i386/headmerge-2.c scan-assembler-times 120 1

New passes:
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto  execution test