re PR middle-end/71693 (ICE: verify_gimple failed (type mismatch in shift…

re PR middle-end/71693 (ICE: verify_gimple failed (type mismatch in shift expression, -O0, -O1, -O2, -O3))

	PR middle-end/71693
	* fold-const.c (fold_binary_loc) <case RROTATE_EXPR>: Cast
	TREE_OPERAND (arg0, 0) and TREE_OPERAND (arg0, 1) to type
	first when permuting bitwise operation with rotate.  Cast
	TREE_OPERAND (arg0, 0) to type when cancelling two rotations.

	* gcc.c-torture/compile/pr71693.c: New test.

From-SVN: r237875

gcc/ChangeLog

+2016-06-30  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/71693
+	* fold-const.c (fold_binary_loc) <case RROTATE_EXPR>: Cast
+	TREE_OPERAND (arg0, 0) and TREE_OPERAND (arg0, 1) to type
+	first when permuting bitwise operation with rotate.  Cast
+	TREE_OPERAND (arg0, 0) to type when cancelling two rotations.
+
 2016-06-29  David Malcolm  <dmalcolm@redhat.com>
 
 	* opts.c (handle_param): Use find_param_fuzzy to offer suggestions

gcc/fold-const.c

@@ -10294,11 +10294,15 @@ fold_binary_loc (location_t loc,
 	      || TREE_CODE (arg0) == BIT_IOR_EXPR
 	      || TREE_CODE (arg0) == BIT_XOR_EXPR)
 	  && TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST)
-	return fold_build2_loc (loc, TREE_CODE (arg0), type,
-			    fold_build2_loc (loc, code, type,
-					 TREE_OPERAND (arg0, 0), arg1),
-			    fold_build2_loc (loc, code, type,
-					 TREE_OPERAND (arg0, 1), arg1));
+	{
+	  tree arg00 = fold_convert_loc (loc, type, TREE_OPERAND (arg0, 0));
+	  tree arg01 = fold_convert_loc (loc, type, TREE_OPERAND (arg0, 1));
+	  return fold_build2_loc (loc, TREE_CODE (arg0), type,
+				  fold_build2_loc (loc, code, type,
+						   arg00, arg1),
+				  fold_build2_loc (loc, code, type,
+						   arg01, arg1));
+	}
 
       /* Two consecutive rotates adding up to the some integer
 	 multiple of the precision of the type can be ignored.  */
@@ -10307,7 +10311,7 @@ fold_binary_loc (location_t loc,
 	  && TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST
 	  && wi::umod_trunc (wi::add (arg1, TREE_OPERAND (arg0, 1)),
 			     prec) == 0)
-	return TREE_OPERAND (arg0, 0);
+	return fold_convert_loc (loc, type, TREE_OPERAND (arg0, 0));
 
       return NULL_TREE;
 

gcc/testsuite/ChangeLog

+2016-06-30  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/71693
+	* gcc.c-torture/compile/pr71693.c: New test.
+
 2016-06-29  David Malcolm  <dmalcolm@redhat.com>
 
 	* gcc.dg/spellcheck-params.c: New testcase.

gcc/testsuite/gcc.c-torture/compile/pr71693.c

+/* PR middle-end/71693 */
+
+unsigned short v;
+
+void
+foo (int x)
+{
+  v = ((((unsigned short) (0x0001 | (x & 0x0070) | 0x0100) & 0x00ffU) << 8)
+       | (((unsigned short) (0x0001 | (x & 0x0070) | 0x0100) >> 8) & 0x00ffU));
+}