Regressions on trunk at revision 161433 vs revision 161427

[H.J. Lu]

New failures:
FAIL: g++.dg/opt/pmf1.C (internal compiler error)
FAIL: g++.dg/opt/pmf1.C (internal compiler error)
FAIL: g++.dg/opt/pmf1.C (test for excess errors)
FAIL: g++.dg/opt/pmf1.C (test for excess errors)

New passes:
ERROR: could not compile testsuite_shared.cc
ERROR: could not compile testsuite_shared.cc
ERROR: tcl error sourcing /export/gnu/import/svn/gcc-test/src-trunk/libstdc++-v3/testsuite/libstdc++-abi/abi.exp.
ERROR: tcl error sourcing /export/gnu/import/svn/gcc-test/src-trunk/libstdc++-v3/testsuite/libstdc++-dg/conformance.exp.