Regressions on 4.5 at revision 170302 vs revision 170267

[H.J. Lu Intel64]

New failures:

New passes:
FAIL: gcc.dg/guality/vla-1.c  -O0  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O0  line 24 sizeof (a) == 17 * sizeof (short)
FAIL: gcc.dg/guality/vla-1.c  -O1  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O1  line 24 sizeof (a) == 17 * sizeof (short)
FAIL: gcc.dg/guality/vla-1.c  -O2  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O2  line 24 sizeof (a) == 17 * sizeof (short)
FAIL: gcc.dg/guality/vla-1.c  -O3 -fomit-frame-pointer  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O3 -fomit-frame-pointer  line 24 sizeof (a) == 17 * sizeof (short)
FAIL: gcc.dg/guality/vla-1.c  -O3 -g  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O3 -g  line 24 sizeof (a) == 17 * sizeof (short)
FAIL: gcc.dg/guality/vla-1.c  -Os  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -Os  line 24 sizeof (a) == 17 * sizeof (short)