2010-09-10 Martin Jambor <mjambor@suse.cz>

2010-09-10  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/44972
	* tree-sra.c: Include toplev.h.
	(build_ref_for_offset): Entirely reimplemented.
	(build_ref_for_model): New function.
	(build_user_friendly_ref_for_offset): New function.
	(analyze_access_subtree): Removed build_ref_for_offset check.
	(propagate_subaccesses_across_link): Likewise.
	(create_artificial_child_access): Use
	build_user_friendly_ref_for_offset.
	(propagate_subaccesses_across_link): Likewise.
	(ref_expr_for_all_replacements_p): Removed.
	(generate_subtree_copies): Updated comment.  Use build_ref_for_model.
	(sra_modify_expr): Use build_ref_for_model.
	(load_assign_lhs_subreplacements): Likewise.
	(sra_modify_assign): Removed ref_expr_for_all_replacements_p checks,
	checks for return values of build_ref_for_offset.
	* ipa-cp.c (ipcp_lattice_from_jfunc): No need to check return value of
	build_ref_for_offset.
	* ipa-prop.h: Include gimple.h
	* ipa-prop.c (ipa_compute_jump_functions): Update to look for MEM_REFs.
	(ipa_analyze_indirect_call_uses): Update comment.
	* Makefile.in (tree-sra.o): Add $(GIMPLE_H) to dependencies.
	(IPA_PROP_H): Likewise.

	* testsuite/gcc.dg/ipa/ipa-sra-1.c: Adjust scanning expressions.
	* testsuite/gcc.dg/tree-ssa/pr45144.c: Likewise.
	* testsuite/gcc.dg/tree-ssa/forwprop-5.c: Likewise and scan optimzed
	dump instead.
        * testsuite/g++.dg/torture/pr44972.C: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@164136 138bc75d-0d04-0410-961f-82ee72b054a4