text: // 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/api.h"
  #include "src/code-factory.h"
  #include "src/code-stubs.h"
  #include "src/compilation-info.h"
  #include "src/compiler.h"
  #include "src/compiler/common-operator.h"
  #include "src/compiler/graph.h"
  #include "src/compiler/linkage.h"
  #include "src/compiler/machine-operator.h"
  #include "src/compiler/node.h"
  #include "src/compiler/operator.h"
  #include "src/compiler/pipeline.h"
  #include "src/compiler/schedule.h"
  #include "src/objects-inl.h"
  #include "src/parsing/parse-info.h"
  #include "src/zone/zone.h"
  #include "test/cctest/cctest.h"
  
  namespace v8 {
  namespace internal {
  namespace compiler {
  
  static Operator dummy_operator(IrOpcode::kParameter, Operator::kNoWrite,
                                 "dummy", 0, 0, 0, 0, 0, 0);
  
  // So we can get a real JS function.
  static Handle<JSFunction> Compile(const char* source) {
    Isolate* isolate = CcTest::i_isolate();
    Handle<String> source_code = isolate->factory()
                                     ->NewStringFromUtf8(CStrVector(source))
                                     .ToHandleChecked();
    Handle<SharedFunctionInfo> shared = Compiler::GetSharedFunctionInfoForScript(
        source_code, Handle<String>(), 0, 0, v8::ScriptOriginOptions(),
        Handle<Object>(), Handle<Context>(isolate->native_context()), NULL, NULL,
        v8::ScriptCompiler::kNoCompileOptions, NOT_NATIVES_CODE);
    return isolate->factory()->NewFunctionFromSharedFunctionInfo(
        shared, isolate->native_context());
  }
  
  
  TEST(TestLinkageCreate) {
    HandleAndZoneScope handles;
    Handle<JSFunction> function = Compile("a + b");
    ParseInfo parse_info(handle(function->shared()));
    CompilationInfo info(parse_info.zone(), &parse_info, function->GetIsolate(),
                         function);
    CallDescriptor* descriptor = Linkage::ComputeIncoming(info.zone(), &info);
    CHECK(descriptor);
  }
  
  
  TEST(TestLinkageJSFunctionIncoming) {
    const char* sources[] = {"(function() { })", "(function(a) { })",
                             "(function(a,b) { })", "(function(a,b,c) { })"};
  
    for (int i = 0; i < 3; i++) {
      HandleAndZoneScope handles;
      Handle<JSFunction> function =
          Handle<JSFunction>::cast(v8::Utils::OpenHandle(
              *v8::Local<v8::Function>::Cast(CompileRun(sources[i]))));
      ParseInfo parse_info(handle(function->shared()));
      CompilationInfo info(parse_info.zone(), &parse_info, function->GetIsolate(),
                           function);
      CallDescriptor* descriptor = Linkage::ComputeIncoming(info.zone(), &info);
      CHECK(descriptor);
  
      CHECK_EQ(1 + i, static_cast<int>(descriptor->JSParameterCount()));
      CHECK_EQ(1, static_cast<int>(descriptor->ReturnCount()));
      CHECK_EQ(Operator::kNoProperties, descriptor->properties());
      CHECK_EQ(true, descriptor->IsJSFunctionCall());
    }
  }
  
  
  TEST(TestLinkageJSCall) {
    HandleAndZoneScope handles;
    Handle<JSFunction> function = Compile("a + c");
    ParseInfo parse_info(handle(function->shared()));
    CompilationInfo info(parse_info.zone(), &parse_info, function->GetIsolate(),
                         function);
  
    for (int i = 0; i < 32; i++) {
      CallDescriptor* descriptor = Linkage::GetJSCallDescriptor(
          info.zone(), false, i, CallDescriptor::kNoFlags);
      CHECK(descriptor);
      CHECK_EQ(i, static_cast<int>(descriptor->JSParameterCount()));
      CHECK_EQ(1, static_cast<int>(descriptor->ReturnCount()));
      CHECK_EQ(Operator::kNoProperties, descriptor->properties());
      CHECK_EQ(true, descriptor->IsJSFunctionCall());
    }
  }
  
  
  TEST(TestLinkageRuntimeCall) {
    // TODO(titzer): test linkage creation for outgoing runtime calls.
  }
  
  
  TEST(TestLinkageStubCall) {
    Isolate* isolate = CcTest::InitIsolateOnce();
    Zone zone(isolate->allocator(), ZONE_NAME);
    Callable callable = CodeFactory::ToNumber(isolate);
    CompilationInfo info(ArrayVector("test"), isolate, &zone,
                         Code::ComputeFlags(Code::STUB));
    CallDescriptor* descriptor = Linkage::GetStubCallDescriptor(
        isolate, &zone, callable.descriptor(), 0, CallDescriptor::kNoFlags,
        Operator::kNoProperties);
    CHECK(descriptor);
    CHECK_EQ(0, static_cast<int>(descriptor->StackParameterCount()));
    CHECK_EQ(1, static_cast<int>(descriptor->ReturnCount()));
    CHECK_EQ(Operator::kNoProperties, descriptor->properties());
    CHECK_EQ(false, descriptor->IsJSFunctionCall());
    // TODO(titzer): test linkage creation for outgoing stub calls.
  }
  
  }  // namespace compiler
  }  // namespace internal
  }  // namespace v8
  