re PR tree-optimization/87633 (ice in compare_range_wit h_value, at vr-values.c:1702)

2018-10-22  Yury Gribov  <tetra2005@gmail.com>

gcc/
	PR tree-optimization/87633
	* match.pd: Do not generate unordered integer comparisons.

gcc/testsuite/
	PR tree-optimization/87633
	* g++.dg/pr87633.C: New test.

From-SVN: r265399

gcc/ChangeLog

+2018-10-22  Yury Gribov  <tetra2005@gmail.com>
+
+	PR tree-optimization/87633
+	* match.pd: Do not generate unordered integer comparisons.
+
 2018-10-22  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	PR rtl-optimization/87600

gcc/match.pd

@@ -3401,7 +3401,8 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
 	(cmp @0 @1))))))
 
 /* Optimize various special cases of (FTYPE) N CMP (FTYPE) M.  */
-(for cmp (tcc_comparison)
+(for cmp  (lt le eq ne ge gt unordered ordered unlt unle ungt unge uneq ltgt)
+     icmp (lt le eq ne ge gt unordered ordered lt   le   gt   ge   eq   ne)
  (simplify
   (cmp (float@0 @1) (float @2))
    (if (SCALAR_FLOAT_TYPE_P (TREE_TYPE (@0))
@@ -3416,15 +3417,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
      }
      (if (fmt.can_represent_integral_type_p (type1)
 	  && fmt.can_represent_integral_type_p (type2))
-      (if (TYPE_PRECISION (type1) > TYPE_PRECISION (type2)
-           && type1_signed_p >= type2_signed_p)
-       (cmp @1 (convert @2))
-       (if (TYPE_PRECISION (type1) < TYPE_PRECISION (type2)
-            && type1_signed_p <= type2_signed_p)
-        (cmp (convert:type2 @1) @2)
-        (if (TYPE_PRECISION (type1) == TYPE_PRECISION (type2)
-             && type1_signed_p == type2_signed_p)
-	 (cmp @1 @2)))))))))
+      (if (cmp == ORDERED_EXPR || cmp == UNORDERED_EXPR)
+       { constant_boolean_node (cmp == ORDERED_EXPR, type); }
+       (if (TYPE_PRECISION (type1) > TYPE_PRECISION (type2)
+            && type1_signed_p >= type2_signed_p)
+        (icmp @1 (convert @2))
+        (if (TYPE_PRECISION (type1) < TYPE_PRECISION (type2)
+             && type1_signed_p <= type2_signed_p)
+         (icmp (convert:type2 @1) @2)
+         (if (TYPE_PRECISION (type1) == TYPE_PRECISION (type2)
+              && type1_signed_p == type2_signed_p)
+	  (icmp @1 @2))))))))))
 
 /* Optimize various special cases of (FTYPE) N CMP CST.  */
 (for cmp  (lt le eq ne ge gt)

gcc/testsuite/ChangeLog

+2018-10-22  Yury Gribov  <tetra2005@gmail.com>
+
+	PR tree-optimization/87633
+	* g++.dg/pr87633.C: New test.
+
 2018-10-22  Marek Polacek  <polacek@redhat.com>
 
 	PR testsuite/87694

gcc/testsuite/g++.dg/pr87633.C

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+class a {
+public:
+  double b() const;
+};
+class c {
+public:
+  int m_fn2() const;
+};
+double a::b() const {
+  return 0 == 0 ? reinterpret_cast<const c *>(this)->m_fn2() : 0;
+}
+bool d;
+void e() {
+  a f;
+  double g = f.b();
+  /* { dg-final { scan-tree-dump-not "unord" "optimized" } } */
+  d = __builtin_isnan(g);
+}