re PR tree-optimization/34458 (ICE in int_cst_value, at tree.c:8047 at -O3)

2008-01-09  Richard Guenther  <rguenther@suse.de>

	PR middle-end/34458
	* tree-data-ref.c (initialize_matrix_A): Use tree_low_cst,
	adjust return type.

	* gcc.c-torture/compile/pr34458.c: New testcase.

From-SVN: r131429

gcc/ChangeLog

 2008-01-09  Richard Guenther  <rguenther@suse.de>
 
+	PR middle-end/34458
+	* tree-data-ref.c (initialize_matrix_A): Use tree_low_cst,
+	adjust return type.
+
+2008-01-09  Richard Guenther  <rguenther@suse.de>
+
 	PR middle-end/34679
 	* tree.c (host_integerp): Check for sizetype only if the
 	type is an integer type.

gcc/testsuite/ChangeLog

+2008-01-09  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/34458
+	* gcc.c-torture/compile/pr34458.c: New testcase.
+
 2008-01-08  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	PR testsuite/30459

gcc/testsuite/gcc.c-torture/compile/pr34458.c

+/* Testcase by Martin Michlmayr <tbm@cyrius.com> */
+
+typedef struct
+{
+  int data[1024];
+}
+Lint;
+Lint lint_operate (Lint a, long long ammount)
+{
+  int index;
+  Lint ret;
+  for (index = 0; index < 24; index++)
+    ret.data[index] =
+      a.data[index + ammount / 32 + 1] << a.data[index + ammount / 32];
+  return ret;
+}

gcc/tree-data-ref.c

@@ -1820,15 +1820,24 @@ analyze_siv_subscript_cst_affine (tree chrec_a,
 /* Helper recursive function for initializing the matrix A.  Returns
    the initial value of CHREC.  */
 
-static int
+static HOST_WIDE_INT
 initialize_matrix_A (lambda_matrix A, tree chrec, unsigned index, int mult)
 {
+  tree type;
+
   gcc_assert (chrec);
 
+  type = TREE_TYPE (chrec);
   if (TREE_CODE (chrec) != POLYNOMIAL_CHREC)
-    return int_cst_value (chrec);
-
-  A[index][0] = mult * int_cst_value (CHREC_RIGHT (chrec));
+    return tree_low_cst (chrec, TYPE_UNSIGNED (type)
+				&& !(TREE_CODE (type) == INTEGER_TYPE
+				     && TYPE_IS_SIZETYPE (type)));
+
+  type = TREE_TYPE (CHREC_RIGHT (chrec));
+  A[index][0] = mult * tree_low_cst (CHREC_RIGHT (chrec),
+				     TYPE_UNSIGNED (type)
+				     && !(TREE_CODE (type) == INTEGER_TYPE
+					  && TYPE_IS_SIZETYPE (type)));
   return initialize_matrix_A (A, CHREC_LEFT (chrec), index + 1, mult);
 }