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* testsuite/lib/mfdg.exp (additional_prunes): New global. (dg-test): Clear additional_prunes before test is run. (dg-prune-output): New procedure. * testsuite/lib/libmudflap.exp (libmudflap-dg-test): Do not call prune_gcc_output. (libmudflap-dg-prune): New procedure. * testsuite/libmudflap.c++/pass57-frag.cxx (dg-prune-output): New dg directive. From-SVN: r159440
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