[builtins] Introduce proper Float64Exp operator.

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

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/js-builtin-reducer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/compiler/typer.h"
 #include "src/isolate-inl.h"
@@ skipping 246 matching lines @@
                                 UndefinedConstant(), p0, context, frame_state,
                                 effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
               IsNumberClz32(IsNumberToUint32(IsPlainPrimitiveToNumber(p0))));
 }
 
 // -----------------------------------------------------------------------------
+// Math.exp
+
+TEST_F(JSBuiltinReducerTest, MathExpWithNumber) {
+  Node* function = MathFunction("exp");
+
+  Node* effect = graph()->start();
+  Node* control = graph()->start();
+  Node* context = UndefinedConstant();
+  Node* frame_state = graph()->start();
+  TRACED_FOREACH(Type*, t0, kNumberTypes) {
+    Node* p0 = Parameter(t0, 0);
+    Node* call = graph()->NewNode(javascript()->CallFunction(3), function,
+                                  UndefinedConstant(), p0, context, frame_state,
+                                  effect, control);
+    Reduction r = Reduce(call);
+
+    ASSERT_TRUE(r.Changed());
+    EXPECT_THAT(r.replacement(), IsNumberExp(p0));
+  }
+}
+
+TEST_F(JSBuiltinReducerTest, MathExpWithPlainPrimitive) {
+  Node* function = MathFunction("exp");
+
+  Node* effect = graph()->start();
+  Node* control = graph()->start();
+  Node* context = UndefinedConstant();
+  Node* frame_state = graph()->start();
+  Node* p0 = Parameter(Type::PlainPrimitive(), 0);
+  Node* call = graph()->NewNode(javascript()->CallFunction(3), function,
+                                UndefinedConstant(), p0, context, frame_state,
+                                effect, control);
+  Reduction r = Reduce(call);
+
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsNumberExp(IsPlainPrimitiveToNumber(p0)));
+}
+
+// -----------------------------------------------------------------------------
 // Math.floor
 
 TEST_F(JSBuiltinReducerTest, MathFloorWithNumber) {
   Node* function = MathFunction("floor");
 
   Node* effect = graph()->start();
   Node* control = graph()->start();
   Node* context = UndefinedConstant();
   Node* frame_state = graph()->start();
   TRACED_FOREACH(Type*, t0, kNumberTypes) {
@@ skipping 511 matching lines @@
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
               IsStringFromCharCode(IsPlainPrimitiveToNumber(p0)));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8