* tree-ssa-address.c: New file.

	* Makefile.in (tree-ssa-address.o): Add.
	* expr.c (expand_expr_real_1): Do not handle REF_ORIGINAL on
	INDIRECT_REFs.  Handle TARGET_MEM_REFs.
	* tree-eh.c (tree_could_trap_p): Handle TARGET_MEM_REFs.
	* tree-flow.h (struct mem_address): New.
	(struct affine_tree_combination): Moved from tree-ssa-loop-ivopts.c.
	(create_mem_ref, addr_for_mem_ref, get_address_description,
	maybe_fold_tmr, multiplier_allowed_in_address_p,
	multiply_by_cost):  Declare.
	* tree-mudflap.c (mf_xform_derefs_1): Handle TARGET_MEM_REFs.
	* tree-pretty-print.c (dump_generic_node): Ditto.
	* tree-ssa-loop-im.c (for_each_index): Ditto.
	* tree-ssa-loop-ivopts.c (may_be_unaligned_p,
	find_interesting_uses_address): Ditto.
	(rewrite_address_base, build_addr_strip_iref): Removed.
	(struct affine_tree_combination): Moved to tree-flow.h.
	(get_ref_tag, copy_ref_info): New functions.
	(rewrite_use_address): Produce TARGET_MEM_REFs.
	(tree_ssa_iv_optimize): Do not call update_ssa
	and rewrite_into_loop_closed_ssa.
	(tree_to_aff_combination): Use build_fold_addr_expr instead of
	build_addr_strip_iref.
	(unshare_aff_combination): New function.
	(fold_affine_sum): Removed.
	(get_computation_at): Use get_computation_aff.  Unshare the result.
	(get_computation_aff, multiplier_allowed_in_address_p): New function.
	(multiply_by_cost): Exported.
	(get_address_cost): Use multiplier_allowed_in_address_p.
	* tree-ssa-operands.c (get_tmr_operands): New function.
	(get_expr_operands): Handle TARGET_MEM_REFs.
	* tree.c (copy_node_stat): Copy annotations for TARGET_MEM_REFs.
	(build): Handle 7 arguments.
	(build7_stat): New function.
	* tree.def (TARGET_MEM_DEF): New.
	* tree.h (REF_ORIGINAL): Removed.
	(TMR_SYMBOL, TMR_BASE, TMR_INDEX, TMR_STEP, TMR_OFFSET, TMR_ORIGINAL,
	TMR_TAG, build7): New macros.
	(build7_stat, tree_mem_ref_addr, copy_mem_ref_info): Declare.
	* tree-ssa-ccp.c (fold_stmt_r): Call maybe_fold_tmr.
	* doc/c-tree.texi: Document TARGET_MEM_REF.
	* doc/tree-ssa.texi: Add TARGET_MEM_REF to gimple grammar.

	* gcc.dg/tree-ssa/loop-2.c: Update outcome.
	* gcc.dg/tree-ssa/loop-3.c: Update outcome.
	* gcc.dg/tree-ssa/loop-4.c: Update outcome.
	* gcc.dg/tree-ssa/loop-9.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100708 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 1 deletions

diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c
index 3fe8de37261..6816dafd6c1 100644
--- a/gcc/tree-ssa-ccp.c
+++ b/gcc/tree-ssa-ccp.c
@@ -1874,7 +1874,6 @@ maybe_fold_stmt_addition (tree expr)
   return t;
 }
 
-
 /* Subroutine of fold_stmt called via walk_tree.  We perform several
    simplifications of EXPR_P, mostly having to do with pointer arithmetic.  */
 
@@ -1948,6 +1947,10 @@ fold_stmt_r (tree *expr_p, int *walk_subtrees, void *data)
       }
       break;
 
+    case TARGET_MEM_REF:
+      t = maybe_fold_tmr (expr);
+      break;
+
     default:
       return NULL_TREE;
     }