re PR tree-optimization/57294 (ice in remove_described_reference)

re PR tree-optimization/57294 (ice in remove_described_reference)

2013-05-24  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/57294
	* cgraph.h (ipa_record_stmt_references): Declare.
	* cgraphbuild.c (ipa_record_stmt_references): New function.
	(build_cgraph_edges): Use ipa_record_stmt_references.
	(rebuild_cgraph_edges): Likewise.
	(cgraph_rebuild_references): Likewise.
	* ipa-prop.c (ipa_modify_call_arguments): Discard references
	associated with the old statement and build references from the
	newly built statements.
	* ipa-ref.c (ipa_remove_stmt_references): New function.
	* ipa-ref.h (ipa_remove_stmt_references): Declare.

testsuite/
	* gcc.dg/ipa/pr57294.c: New test.

From-SVN: r199299