Regressions on trunk at revision 149520 vs revision 149512

[H.J. Lu ia64]

New failures:
FAIL: g++.dg/torture/pr40388.C  -O0  (test for excess errors)
FAIL: g++.dg/torture/pr40388.C  -O1  (test for excess errors)
FAIL: g++.dg/torture/pr40388.C  -O2  (test for excess errors)
FAIL: g++.dg/torture/pr40388.C  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: g++.dg/torture/pr40388.C  -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr40388.C  -Os  (test for excess errors)

New passes: