Regressions on trunk at revision 193282 vs revision 193280

[H.J. Lu Intel64 Core 2/i7]

New failures:
FAIL: gcc.dg/guality/pr43051-1.c  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O3 -fomit-frame-pointer -funroll-loops  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr54693-2.c  -Os  line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c  -Os  line 21 y == 20 - 2 * i

New passes:
FAIL: gcc.dg/guality/pr54693.c  -O1  line 22 i == c - 48
FAIL: gcc.dg/guality/pr54693.c  -O1  line 22 i == c - 48