1//===- unittests/Frontend/CodeGenActionTest.cpp --- FrontendAction tests --===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Unit tests for CodeGenAction.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/Frontend/CompilerInstance.h"
15#include "clang/CodeGen/CodeGenAction.h"
16#include "clang/CodeGen/BackendUtil.h"
17#include "gtest/gtest.h"
18
19using namespace llvm;
20using namespace clang;
21using namespace clang::frontend;
22
23namespace {
24
25
26class NullCodeGenAction : public CodeGenAction {
27public:
28  NullCodeGenAction(llvm::LLVMContext *_VMContext = nullptr)
29    : CodeGenAction(Backend_EmitMCNull, _VMContext) {}
30
31  // The action does not call methods of ATContext.
32  void ExecuteAction() override {
33    CompilerInstance &CI = getCompilerInstance();
34    if (!CI.hasPreprocessor())
35      return;
36    if (!CI.hasSema())
37      CI.createSema(getTranslationUnitKind(), nullptr);
38  }
39};
40
41
42TEST(CodeGenTest, TestNullCodeGen) {
43  CompilerInvocation *Invocation = new CompilerInvocation;
44  Invocation->getPreprocessorOpts().addRemappedFile(
45      "test.cc",
46      MemoryBuffer::getMemBuffer("").release());
47  Invocation->getFrontendOpts().Inputs.push_back(
48      FrontendInputFile("test.cc", IK_CXX));
49  Invocation->getFrontendOpts().ProgramAction = EmitLLVM;
50  Invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
51  CompilerInstance Compiler;
52  Compiler.setInvocation(Invocation);
53  Compiler.createDiagnostics();
54  EXPECT_TRUE(Compiler.hasDiagnostics());
55
56  std::unique_ptr<FrontendAction> Act(new NullCodeGenAction);
57  bool Success = Compiler.ExecuteAction(*Act);
58  EXPECT_TRUE(Success);
59}
60
61}
62