re PR middle-end/50333 (internal compiler error: in extract_ops_from_tree, at gimple.h:1909)

2011-09-09  Richard Guenther  <rguenther@suse.de>

	PR middle-end/50333
	* tree-data-ref.c (split_constant_offset): Do not try to handle
	ternary ops.

	* gcc.dg/torture/pr50333.c: New testcase.

From-SVN: r178720

gcc/ChangeLog

+2011-09-09  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/50333
+	* tree-data-ref.c (split_constant_offset): Do not try to handle
+	ternary ops.
+
 2011-09-08  Andrew Stubbs  <ams@codesourcery.com>
 
 	PR tree-optimization/50318

gcc/testsuite/ChangeLog

+2011-09-09  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/50333
+	* gcc.dg/torture/pr50333.c: New testcase.
+
 2011-09-08  Andrew Stubbs  <ams@codesourcery.com>
 
 	PR tree-optimization/50318

gcc/testsuite/gcc.dg/torture/pr50333.c

+/* { dg-do compile } */
+
+static inline void
+unext(unsigned int *_ui, unsigned _len, unsigned int _ui0)
+{
+    unsigned j = 1;
+    while (++j<_len)
+      ;
+    _ui[j-1]=_ui0;
+}
+unsigned int
+ncwrs_urow(unsigned _n, unsigned _k, unsigned int *_u)
+{
+  unsigned k;
+  for(k=2; k<_n; k++)
+    unext(_u+1,_k+1,1);
+}

gcc/tree-data-ref.c

@@ -686,7 +686,8 @@ split_constant_offset (tree exp, tree *var, tree *off)
   *off = ssize_int (0);
   STRIP_NOPS (exp);
 
-  if (tree_is_chrec (exp))
+  if (tree_is_chrec (exp)
+      || get_gimple_rhs_class (TREE_CODE (exp)) == GIMPLE_TERNARY_RHS)
     return;
 
   otype = TREE_TYPE (exp);