re PR tree-optimization/38997 (-ftree-loop-distribution ICEs)

gcc/
	PR tree-optimization/38997
	* tree-loop-distribution.c (generate_memset_zero): Use
	POINTER_PLUS_EXPR for a pointer addition.

gcc/testsuite/
	PR tree-optimization/38997
	* gcc.dg/tree-ssa/pr38997.c: New.

From-SVN: r143739

gcc/ChangeLog

+2009-01-28  Kazu Hirata  <kazu@codesourcery.com>
+
+	PR tree-optimization/38997
+	* tree-loop-distribution.c (generate_memset_zero): Use
+	POINTER_PLUS_EXPR for a pointer addition.
+
 2009-01-28  Andreas Krebbel  <krebbel1@de.ibm.com>
 
 	* config/s390/s390.md (bswap<mode>2): New pattern added.

gcc/testsuite/ChangeLog

+2009-01-28  Kazu Hirata  <kazu@codesourcery.com>
+
+	PR tree-optimization/38997
+	* gcc.dg/tree-ssa/pr38997.c: New.
+
 2009-01-28  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/38926

gcc/tree-loop-distribution.c

@@ -256,10 +256,15 @@ generate_memset_zero (gimple stmt, tree op0, tree nb_iter,
   /* Test for a positive stride, iterating over every element.  */
   if (integer_zerop (fold_build2 (MINUS_EXPR, integer_type_node, DR_STEP (dr),
 				  TYPE_SIZE_UNIT (TREE_TYPE (op0)))))
-    addr_base = fold_build2 (PLUS_EXPR, TREE_TYPE (DR_BASE_ADDRESS (dr)),
-			     DR_BASE_ADDRESS (dr), 
-			     size_binop (PLUS_EXPR,
-					 DR_OFFSET (dr), DR_INIT (dr)));
+    {
+      tree offset = fold_convert (sizetype,
+				  size_binop (PLUS_EXPR,
+					      DR_OFFSET (dr),
+					      DR_INIT (dr)));
+      addr_base = fold_build2 (POINTER_PLUS_EXPR,
+			       TREE_TYPE (DR_BASE_ADDRESS (dr)),
+			       DR_BASE_ADDRESS (dr), offset);
+    }
 
   /* Test for a negative stride, iterating over every element.  */
   else if (integer_zerop (fold_build2 (PLUS_EXPR, integer_type_node,