Regressions on 4.5 at revision 165349 vs revision 165234

[H.J. Lu ia64]

New failures:
FAIL: gcc.c-torture/compile/limits-pointer.c  -O2 -flto  (test for excess errors)
FAIL: gcc.c-torture/execute/builtins/strchr.c compilation,  -O2 -flto 

New passes:
FAIL: gcc.c-torture/compile/pr32606.c  -O2  (test for excess errors)
FAIL: gcc.c-torture/execute/builtins/stpcpy-chk.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/unsorted/dump-noaddr.c,  -O2 -fwhopr   -dumpbase dump1/dump-noaddr.c -DMASK=1 -x c --param ggc-min-heapsize=1 -fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr