Regressions on trunk at revision 171045 vs revision 171026

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

New failures:
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto  line 16 b == 7
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto  line 16 c == 11
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto  line 16 d == 112
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto  line 16 e == 142
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto -flto-partition=none  line 16 b == 7
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto -flto-partition=none  line 16 c == 11
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto -flto-partition=none  line 16 d == 112
FAIL: gcc.dg/guality/pr45882.c  -O2 -flto -flto-partition=none  line 16 e == 142

New passes:
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto  line 12 arg1 == 1
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto  line 14 arg1 == 1
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto -flto-partition=none  line 12 arg1 == 1
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto -flto-partition=none  line 14 arg1 == 1