Regressions on trunk at revision 261909 vs revision 261888

[H.J. Lu ia32 -fpic]

New failures:

New passes:
FAIL: 21_strings/basic_string/modifiers/64422.cc (test for excess errors)
FAIL: 21_strings/basic_string/modifiers/insert/char/1.cc (test for excess errors)
FAIL: 21_strings/basic_string/modifiers/insert/wchar_t/1.cc (test for excess errors)
FAIL: ext/pb_ds/regression/tree_map_rand.cc (test for excess errors)
FAIL: ext/pb_ds/regression/tree_set_rand.cc (test for excess errors)
FAIL: ext/pb_ds/regression/trie_map_rand.cc (test for excess errors)
FAIL: ext/pb_ds/regression/trie_set_rand.cc (test for excess errors)
FAIL: g++.dg/torture/pr60750.C   -O0  (test for excess errors)
FAIL: g++.dg/torture/pr60750.C   -Os  (test for excess errors)
FAIL: libstdc++-abi/abi_check