Regressions on trunk at revision 250648 vs revision 250607

[H.J. Lu]

New failures:
FAIL: gcc.target/i386/mpx/return-struct-6-ubv.c   -O2  (test for excess errors)
FAIL: gcc.target/i386/mpx/return-struct-6-ubv.c   -O3 -g  (test for excess errors)
FAIL: gcc.target/i386/mpx/return-struct-6-ubv.c   -Os  (test for excess errors)
FAIL: gcc.target/i386/mpx/static-init-6-ubv.c   -O1  (test for excess errors)
FAIL: g++.dg/tree-prof/partition2.C execution,    -g

New passes: