Regressions on trunk at revision 218249 vs revision 218247

[H.J. Lu ia32 Core i7]

New failures:

New passes:
FAIL: gcc.dg/guality/vla-2.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c   -O2  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c   -O3 -fomit-frame-pointer  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c   -O3 -g  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c   -Os  line 25 sizeof (a) == 6 * sizeof (int)