Regressions on trunk at revision 182760 vs revision 182758

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

New failures:

New passes:
FAIL: gcc.dg/guality/pr43177.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 15 x == 7
FAIL: gcc.dg/guality/pr43177.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 24 x == 7