Regressions on trunk at revision 220408 vs revision 220391

[H.J. Lu x32 -fpic]

New failures:

New passes:
FAIL: gcc.dg/guality/pr36728-1.c   -O1  line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-1.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-1.c   -O2  line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-1.c   -O3 -fomit-frame-pointer  line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-1.c   -O3 -g  line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-1.c   -Os  line 18 arg3 == 3