Regressions on trunk at revision 204003 vs revision 203947

[H.J. Lu Intel64]

New failures:

New passes:
FAIL: gcc.dg/tree-ssa/reassoc-28.c scan-tree-dump-times reassoc1 "to a different BB" 1
FAIL: gcc.dg/tree-ssa/reassoc-28.c scan-tree-dump-times reassoc1 "to a different BB" 1
FAIL: gcc.dg/tree-ssa/reassoc-28.c scan-tree-dump-times reassoc1 "within same BB" 2
FAIL: gcc.dg/tree-ssa/reassoc-28.c scan-tree-dump-times reassoc1 "within same BB" 2
FAIL: gcc.target/i386/funcspec-5.c (test for excess errors)