Regressions on trunk at revision 221593 vs revision 221585

[H.J. Lu x32 -fpic]

New failures:

New passes:
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11  (test for warnings, line 82)
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11  (test for warnings, line 92)
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11  (test for warnings, line 94)
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11  (test for warnings, line 96)
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11  (test for warnings, line 98)
FAIL: g++.dg/warn/overflow-warn-1.C  -std=gnu++11  (test for warnings, line 99)