2010-12-15  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/46053
	PR middle-end/46287
	PR middle-end/46242
	* cgraph.h (cgraph_indirect_call_info): New field thunk_delta.
	* gimple.h (gimple_fold_obj_type_ref): Declaration removed.
	(gimple_fold_call): Declare.
	(gimple_adjust_this_by_delta): Likewise.
	* cgraph.c (cgraph_make_edge_direct): New parameter delta.  Updated
	all users.
	(cgraph_clone_edge): Create a copy of indirect_info also for direct
	edges.
	* cgraphunit.c (cgraph_redirect_edge_call_stmt_to_callee): Adjust this
	parameters.
	* gimple-fold.c (gimple_fold_obj_type_ref_known_binfo): Renamed to
	gimple_get_virt_mehtod_for_binfo, new parameter delta.  Do not search
	through thunks, in fact bail out if we encounter one, check that
	BINFO_VIRTUALS is not NULL.
	(gimple_adjust_this_by_delta): New function.
	(gimple_fold_obj_type_ref): Removed.
	(gimple_fold_obj_type_ref_call): New function.
	(fold_gimple_call): Renamed to gimple_fold_call, made external.
	Updated users.  Call gimple_fold_obj_type_ref_call instead of
	gimple_fold_obj_type_ref.
	* ipa-cp.c (ipcp_process_devirtualization_opportunities): Process
	thunk deltas.
	(ipcp_discover_new_direct_edges): Likewise.
	* ipa-prop.c (ipa_make_edge_direct_to_target): New parameter delta.
	Updated callers.
	(ipa_write_indirect_edge_info): Stream thunk_delta.
	(ipa_read_indirect_edge_info): Likewise.
	* tree-ssa-ccp.c (ccp_fold_stmt): Use gimple_fold_call instead of
	gimple_fold_obj_type_ref.

	* testsuite/g++.dg/ipa/pr46053.C: New test.
	* testsuite/g++.dg/ipa/pr46287-1.C: Likewise.
	* testsuite/g++.dg/ipa/pr46287-2.C: Likewise.
	* testsuite/g++.dg/ipa/pr46287-3.C: Likewise.
	* testsuite/g++.dg/torture/covariant-1.C: Likewise.
	* testsuite/g++.dg/torture/pr46287.C: Likewise.

From-SVN: r167855