Regressions on master at commit r11-2906 vs commit r11-2894 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: gcc.dg/tree-ssa/scev-3.c scan-tree-dump-times ivopts "&a" 1
FAIL: gcc.dg/tree-ssa/scev-4.c scan-tree-dump-times ivopts "&a" 1
FAIL: gcc.dg/tree-ssa/scev-5.c scan-tree-dump-times ivopts "&a" 1

New passes: