re PR tree-optimization/47140 (error: conversion of register to a different size)

	PR tree-optimization/47140
	* tree-ssa-ccp.c (evaluate_stmt): For binary assignments, use
	TREE_TYPE (lhs) instead of TREE_TYPE (rhs1) as second argument
	to bit_value_binop.

	* gcc.c-torture/compile/pr47140.c: New test.

From-SVN: r168402

gcc/ChangeLog

 2011-01-02  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/47140
+	* tree-ssa-ccp.c (evaluate_stmt): For binary assignments, use
+	TREE_TYPE (lhs) instead of TREE_TYPE (rhs1) as second argument
+	to bit_value_binop.
+
 	PR rtl-optimization/47028
 	* cfgexpand.c (gimple_expand_cfg): Insert entry edge
 	insertions after parm_birth_insn instead of at the beginning

gcc/testsuite/ChangeLog

 2011-01-02  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/47140
+	* gcc.c-torture/compile/pr47140.c: New test.
+
 	PR rtl-optimization/47028
 	* gcc.dg/pr47028.c: New test.
 

gcc/testsuite/gcc.c-torture/compile/pr47140.c

+/* PR tree-optimization/47140 */
+
+static inline int
+foo (int x, short y)
+{
+  return y == 0 ? x : x + y;
+}
+
+static inline unsigned short
+bar (unsigned short x, unsigned char y)
+{
+  return x - y;
+}
+
+int w;
+
+int baz (void);
+
+int
+test (void)
+{
+  int i;
+  for (i = 0; i < 50; i++)
+    w += foo ((unsigned char) (1 + baz ()) >= bar (0, 1), 0);
+}

gcc/tree-ssa-ccp.c

@@ -2156,9 +2156,10 @@ evaluate_stmt (gimple stmt)
 	      if (INTEGRAL_TYPE_P (TREE_TYPE (rhs1))
 		  || POINTER_TYPE_P (TREE_TYPE (rhs1)))
 		{
+		  tree lhs = gimple_assign_lhs (stmt);
 		  tree rhs2 = gimple_assign_rhs2 (stmt);
 		  val = bit_value_binop (subcode,
-					 TREE_TYPE (rhs1), rhs1, rhs2);
+					 TREE_TYPE (lhs), rhs1, rhs2);
 		}
 	      break;