tree-ssa-pre.c (create_component_ref_by_pieces_1): Fix TARGET_MEM_REF creation.

2019-10-17  Richard Biener  <rguenther@suse.de>

	* tree-ssa-pre.c (create_component_ref_by_pieces_1): Fix
	TARGET_MEM_REF creation.

From-SVN: r277098

gcc/ChangeLog

 2019-10-17  Richard Biener  <rguenther@suse.de>
 
+	* tree-ssa-pre.c (create_component_ref_by_pieces_1): Fix
+	TARGET_MEM_REF creation.
+
+2019-10-17  Richard Biener  <rguenther@suse.de>
+
 	PR tree-optimization/92129
 	* tree-vect-loop.c (vectorizable_reduction): Also fail
 	on GIMPLE_SINGLE_RHS.

gcc/tree-ssa-pre.c

@@ -2492,7 +2492,7 @@ create_component_ref_by_pieces_1 (basic_block block, vn_reference_t ref,
     case TARGET_MEM_REF:
       {
 	tree genop0 = NULL_TREE, genop1 = NULL_TREE;
-	vn_reference_op_t nextop = &ref->operands[++*operand];
+	vn_reference_op_t nextop = &ref->operands[(*operand)++];
 	tree baseop = create_component_ref_by_pieces_1 (block, ref, operand,
 							stmts);
 	if (!baseop)