[turbofan] Use builtin inlining mechanism for Math.floor.

test/unittests/compiler/js-builtin-reducer-unittest.cc

Index: test/unittests/compiler/js-builtin-reducer-unittest.cc
diff --git a/test/unittests/compiler/js-builtin-reducer-unittest.cc b/test/unittests/compiler/js-builtin-reducer-unittest.cc
index 88bb9d12dec59934428dda50333cc81460c00736..ee9f960057cac01127b3a8500f4a40ab142759cf 100644
--- a/test/unittests/compiler/js-builtin-reducer-unittest.cc
+++ b/test/unittests/compiler/js-builtin-reducer-unittest.cc
@@ -223,43 +223,6 @@ TEST_F(JSBuiltinReducerTest, MathFround) {
   }
 }
 
-
-// -----------------------------------------------------------------------------
-// Math.floor
-
-
-TEST_F(JSBuiltinReducerTest, MathFloorAvailable) {
-  Handle<JSFunction> f = MathFunction("floor");
-
-  TRACED_FOREACH(Type*, t0, kNumberTypes) {
-    Node* p0 = Parameter(t0, 0);
-    Node* fun = HeapConstant(Unique<HeapObject>::CreateUninitialized(f));
-    Node* call =
-        graph()->NewNode(javascript()->CallFunction(3, NO_CALL_FUNCTION_FLAGS),
-                         fun, UndefinedConstant(), p0);
-    Reduction r = Reduce(call, MachineOperatorBuilder::Flag::kFloat64RoundDown);
-
-    ASSERT_TRUE(r.Changed());
-    EXPECT_THAT(r.replacement(), IsFloat64RoundDown(p0));
-  }
-}
-
-
-TEST_F(JSBuiltinReducerTest, MathFloorUnavailable) {
-  Handle<JSFunction> f = MathFunction("floor");
-
-  TRACED_FOREACH(Type*, t0, kNumberTypes) {
-    Node* p0 = Parameter(t0, 0);
-    Node* fun = HeapConstant(Unique<HeapObject>::CreateUninitialized(f));
-    Node* call =
-        graph()->NewNode(javascript()->CallFunction(3, NO_CALL_FUNCTION_FLAGS),
-                         fun, UndefinedConstant(), p0);
-    Reduction r = Reduce(call, MachineOperatorBuilder::Flag::kNoFlags);
-
-    ASSERT_FALSE(r.Changed());
-  }
-}
-
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8