re PR middle-end/26869 (Segfault in find_lattice_value() for complex operands.)

2006-04-24  Richard Guenther  <rguenther@suse.de>

	PR middle-end/26869
	* tree-complex.c (update_parameter_components): Don't handle
	unused parameters which have no default def.

	* gcc.dg/torture/pr26869.c: New testcase.

From-SVN: r113219

gcc/ChangeLog

+2006-04-24  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/26869
+	* tree-complex.c (update_parameter_components): Don't handle
+	unused parameters which have no default def.
+
 2006-04-24  Andrew Pinski  <pinskia@gcc.gnu.org>
 	Richard Guenther  <rguenther@suse.de>
 

gcc/testsuite/ChangeLog

+2006-04-24  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/26869
+	* gcc.dg/torture/pr26869.c: New testcase.
+
 2006-04-24  Andrew Pinski  <pinskia@gcc.gnu.org>
 	Richard Guenther  <rguenther@suse.de>
 

gcc/testsuite/gcc.dg/torture/pr26869.c

+/* { dg-do compile } */
+
+_Complex float f (_Complex float b, _Complex float c)
+{
+  _Complex float a = 1.0 + 0.0i;
+  return a / c;
+}

gcc/tree-complex.c

@@ -652,6 +652,8 @@ update_parameter_components (void)
 
       type = TREE_TYPE (type);
       ssa_name = default_def (parm);
+      if (!ssa_name)
+	continue;
 
       r = build1 (REALPART_EXPR, type, ssa_name);
       i = build1 (IMAGPART_EXPR, type, ssa_name);