re PR tree-optimization/48717 (integer wrong code bug)

	PR tree-optimization/48717
	* tree-ssa-forwprop.c (associate_plusminus): For A + ~A and
	~A + A optimizations use build_int_cst_type instead of build_int_cst.

	* gcc.c-torture/execute/pr48717.c: New test.

From-SVN: r172868

gcc/ChangeLog

+2011-04-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/48717
+	* tree-ssa-forwprop.c (associate_plusminus): For A + ~A and
+	~A + A optimizations use build_int_cst_type instead of build_int_cst.
+
 2011-04-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/48723

gcc/testsuite/ChangeLog

+2011-04-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/48717
+	* gcc.c-torture/execute/pr48717.c: New test.
+
 2011-04-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/48723

gcc/testsuite/gcc.c-torture/execute/pr48717.c

+/* PR tree-optimization/48717 */
+
+extern void abort (void);
+
+int v = 1, w;
+
+unsigned short
+foo (unsigned short x, unsigned short y)
+{
+  return x + y;
+}
+
+void
+bar (void)
+{
+  v = foo (~w, w);
+}
+
+int
+main ()
+{
+  bar ();
+  if (v != (unsigned short) -1)
+    abort ();
+  return 0;
+}

gcc/tree-ssa-forwprop.c

@@ -1815,7 +1815,7 @@ associate_plusminus (gimple stmt)
 		{
 		  /* ~A + A -> -1.  */
 		  code = INTEGER_CST;
-		  rhs1 = build_int_cst (TREE_TYPE (rhs2), -1);
+		  rhs1 = build_int_cst_type (TREE_TYPE (rhs2), -1);
 		  rhs2 = NULL_TREE;
 		  gimple_assign_set_rhs_with_ops (&gsi, code, rhs1, NULL_TREE);
 		  gcc_assert (gsi_stmt (gsi) == stmt);
@@ -1915,7 +1915,7 @@ associate_plusminus (gimple stmt)
 		{
 		  /* A + ~A -> -1.  */
 		  code = INTEGER_CST;
-		  rhs1 = build_int_cst (TREE_TYPE (rhs1), -1);
+		  rhs1 = build_int_cst_type (TREE_TYPE (rhs1), -1);
 		  rhs2 = NULL_TREE;
 		  gimple_assign_set_rhs_with_ops (&gsi, code, rhs1, NULL_TREE);
 		  gcc_assert (gsi_stmt (gsi) == stmt);