[turbofan] Reduce Float64 comparison to Float32.

test/unittests/compiler/machine-operator-reducer-unittest.cc

Index: test/unittests/compiler/machine-operator-reducer-unittest.cc
diff --git a/test/unittests/compiler/machine-operator-reducer-unittest.cc b/test/unittests/compiler/machine-operator-reducer-unittest.cc
index ce11fdef815232be74f581a36e8de72a0e50df9b..b14e9d392d8bb649376f8721de52f497c05568ab 100644
--- a/test/unittests/compiler/machine-operator-reducer-unittest.cc
+++ b/test/unittests/compiler/machine-operator-reducer-unittest.cc
@@ -1438,6 +1438,55 @@ TEST_F(MachineOperatorReducerTest, Float64InsertHighWord32WithConstant) {
 
 
 // -----------------------------------------------------------------------------
+// Float64Equal
+
+
+TEST_F(MachineOperatorReducerTest, Float64EqualWithFloat32Conversions) {
+  Node* const p0 = Parameter(0);
+  Node* const p1 = Parameter(1);
+  Reduction const r = Reduce(graph()->NewNode(
+      machine()->Float64Equal(),
+      graph()->NewNode(machine()->ChangeFloat32ToFloat64(), p0),
+      graph()->NewNode(machine()->ChangeFloat32ToFloat64(), p1)));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsFloat32Equal(p0, p1));
+}
+
+
+// -----------------------------------------------------------------------------
+// Float64LessThan
+
+
+TEST_F(MachineOperatorReducerTest, Float64LessThanWithFloat32Conversions) {
+  Node* const p0 = Parameter(0);
+  Node* const p1 = Parameter(1);
+  Reduction const r = Reduce(graph()->NewNode(
+      machine()->Float64LessThan(),
+      graph()->NewNode(machine()->ChangeFloat32ToFloat64(), p0),
+      graph()->NewNode(machine()->ChangeFloat32ToFloat64(), p1)));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsFloat32LessThan(p0, p1));
+}
+
+
+// -----------------------------------------------------------------------------
+// Float64LessThanOrEqual
+
+
+TEST_F(MachineOperatorReducerTest,
+       Float64LessThanOrEqualWithFloat32Conversions) {
+  Node* const p0 = Parameter(0);
+  Node* const p1 = Parameter(1);
+  Reduction const r = Reduce(graph()->NewNode(
+      machine()->Float64LessThanOrEqual(),
+      graph()->NewNode(machine()->ChangeFloat32ToFloat64(), p0),
+      graph()->NewNode(machine()->ChangeFloat32ToFloat64(), p1)));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsFloat32LessThanOrEqual(p0, p1));
+}
+
+
+// -----------------------------------------------------------------------------
 // Store