[turbofan] Introduce Float64Pow and NumberPow operators.

test/cctest/compiler/test-code-assembler.cc

 // Copyright 2015 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/code-assembler.h"
 #include "src/isolate.h"
 #include "test/cctest/compiler/code-assembler-tester.h"
 #include "test/cctest/compiler/function-tester.h"
 
 namespace v8 {
@@ skipping 85 matching lines @@
   CHECK_EQ(0, Handle<Smi>::cast(result.ToHandleChecked())->value());
 }
 
 TEST(SimpleCallRuntime2Arg) {
   Isolate* isolate(CcTest::InitIsolateOnce());
   VoidDescriptor descriptor(isolate);
   CodeAssemblerTester m(isolate, descriptor);
   Node* context = m.HeapConstant(Handle<Context>(isolate->native_context()));
   Node* a = SmiTag(m, m.Int32Constant(2));
   Node* b = SmiTag(m, m.Int32Constant(4));
-  m.Return(m.CallRuntime(Runtime::kMathPow, context, a, b));
+  m.Return(m.CallRuntime(Runtime::kAdd, context, a, b));
   Handle<Code> code = m.GenerateCode();
   FunctionTester ft(descriptor, code);
   MaybeHandle<Object> result = ft.Call();
-  CHECK_EQ(16, Handle<Smi>::cast(result.ToHandleChecked())->value());
+  CHECK_EQ(6, Handle<Smi>::cast(result.ToHandleChecked())->value());
 }
 
 TEST(SimpleTailCallRuntime2Arg) {
   Isolate* isolate(CcTest::InitIsolateOnce());
   VoidDescriptor descriptor(isolate);
   CodeAssemblerTester m(isolate, descriptor);
   Node* context = m.HeapConstant(Handle<Context>(isolate->native_context()));
   Node* a = SmiTag(m, m.Int32Constant(2));
   Node* b = SmiTag(m, m.Int32Constant(4));
-  m.TailCallRuntime(Runtime::kMathPow, context, a, b);
+  m.TailCallRuntime(Runtime::kAdd, context, a, b);
   Handle<Code> code = m.GenerateCode();
   FunctionTester ft(descriptor, code);
   MaybeHandle<Object> result = ft.Call();
-  CHECK_EQ(16, Handle<Smi>::cast(result.ToHandleChecked())->value());
+  CHECK_EQ(6, Handle<Smi>::cast(result.ToHandleChecked())->value());
 }
 
 namespace {
 
 Handle<JSFunction> CreateSumAllArgumentsFunction(FunctionTester& ft) {
   const char* source =
       "(function() {\n"
       "  var sum = 0 + this;\n"
       "  for (var i = 0; i < arguments.length; i++) {\n"
       "    sum += arguments[i];\n"
@@ skipping 294 matching lines @@
     var_object.Bind(m.IntPtrConstant(66));
     m.Goto(&block1);
   }
   m.Bind(&block1);
   CHECK(!m.GenerateCode().is_null());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8