Avoid two_valued_val_range_p for pointers.

2017-11-22  Marc Glisse  <marc.glisse@inria.fr>

	PR tree-optimization/83104
gcc/
	* vr-values.c (simplify_stmt_using_ranges): Check integral argument,
	not result.

gcc/testsuite/
	* gcc.c-torture/compile/pr83104.c: New file.

From-SVN: r255068

gcc/ChangeLog

+2017-11-22  Marc Glisse  <marc.glisse@inria.fr>
+
+	PR tree-optimization/83104
+	* vr-values.c (simplify_stmt_using_ranges): Check integral argument,
+	not result.
+
 2017-11-22  Marek Polacek  <polacek@redhat.com>
 	    H.J. Lu  <hongjiu.lu@intel.com>
 	    Jason Merrill  <jason@redhat.com>

gcc/testsuite/ChangeLog

+2017-11-22  Marc Glisse  <marc.glisse@inria.fr>
+
+	PR tree-optimization/83104
+	* gcc.c-torture/compile/pr83104.c: New file.
+
 2017-11-22  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* gcc.target/arm/pr56184.C: Add -Wno-return-type to dg-options.

gcc/testsuite/gcc.c-torture/compile/pr83104.c

+int *a;
+int foo() {
+  if (a && a - (int *)0 > 0)
+    return 0;
+}

gcc/vr-values.c

@@ -4091,7 +4091,7 @@ vr_values::simplify_stmt_using_ranges (gimple_stmt_iterator *gsi)
 	 LHS = VAR == VAL1 ? (VAL1 BINOP CST) : (VAL2 BINOP CST) */
 
       if (TREE_CODE_CLASS (rhs_code) == tcc_binary
-	  && INTEGRAL_TYPE_P (TREE_TYPE (lhs))
+	  && INTEGRAL_TYPE_P (TREE_TYPE (rhs1))
 	  && ((TREE_CODE (rhs1) == INTEGER_CST
 	       && TREE_CODE (rhs2) == SSA_NAME)
 	      || (TREE_CODE (rhs2) == INTEGER_CST