re PR tree-optimization/85446 (wrong-code on riscv64)

	PR tree-optimization/85446
	* match.pd ((intptr_t) x eq/ne CST to x eq/ne (typeof x) cst): Require
	the integral and pointer types to have the same precision.

From-SVN: r259488

gcc/ChangeLog

 2018-04-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/85446
+	* match.pd ((intptr_t) x eq/ne CST to x eq/ne (typeof x) cst): Require
+	the integral and pointer types to have the same precision.
+
 	* doc/install.texi: Document --disable-cet being the default and
 	--enable-cet=auto.
 

gcc/match.pd

@@ -3711,10 +3711,13 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
 (for cmp (ne eq)
  (simplify
   (cmp (convert @0) INTEGER_CST@1)
-  (if ((POINTER_TYPE_P (TREE_TYPE (@0)) && !FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (@0)))
-	&& INTEGRAL_TYPE_P (TREE_TYPE (@1)))
-      || (INTEGRAL_TYPE_P (TREE_TYPE (@0)) && POINTER_TYPE_P (TREE_TYPE (@1))
-	  && !FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (@1)))))
+  (if (((POINTER_TYPE_P (TREE_TYPE (@0))
+	 && !FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (@0)))
+	 && INTEGRAL_TYPE_P (TREE_TYPE (@1)))
+	|| (INTEGRAL_TYPE_P (TREE_TYPE (@0))
+	    && POINTER_TYPE_P (TREE_TYPE (@1))
+	    && !FUNC_OR_METHOD_TYPE_P (TREE_TYPE (TREE_TYPE (@1)))))
+       && TYPE_PRECISION (TREE_TYPE (@0)) == TYPE_PRECISION (TREE_TYPE (@1)))
    (cmp @0 (convert @1)))))
 
 /* Non-equality compare simplifications from fold_binary  */