Regressions on trunk at revision 170306 vs revision 170271

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

New failures:
FAIL: gcc.dg/guality/pr41353-1.c  -O2 -flto  line 17 vari == 17
FAIL: gcc.dg/guality/pr43077-1.c  -O2 -flto  line 42 varb == 2

New passes:
FAIL: gcc.dg/lto/20081115 c_lto_20081115_0.o-c_lto_20081115_2.o execute -O0 -flto -flto-partition=1to1
FAIL: gcc.dg/lto/20081118 c_lto_20081118_0.o-c_lto_20081118_2.o execute -O0 -flto -flto-partition=1to1
FAIL: gcc.dg/lto/20081201-1 c_lto_20081201-1_0.o-c_lto_20081201-1_2.o execute -O0 -flto -flto-partition=1to1