clang/unittests/Frontend/CodeGenActionTest.cpp

   1 //===- unittests/Frontend/CodeGenActionTest.cpp --- FrontendAction tests --===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Unit tests for CodeGenAction.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "clang/CodeGen/CodeGenAction.h"
  14 #include "clang/Basic/LangStandard.h"
  15 #include "clang/CodeGen/BackendUtil.h"
  16 #include "clang/Frontend/CompilerInstance.h"
  17 #include "clang/Lex/PreprocessorOptions.h"
  18 #include "gtest/gtest.h"
  19
  20 using namespace llvm;
  21 using namespace clang;
  22 using namespace clang::frontend;
  23
  24 namespace {
  25
  26
  27 class NullCodeGenAction : public CodeGenAction {
  28 public:
  29   NullCodeGenAction(llvm::LLVMContext *_VMContext = nullptr)
  30     : CodeGenAction(Backend_EmitMCNull, _VMContext) {}
  31
  32   // The action does not call methods of ATContext.
  33   void ExecuteAction() override {
  34     CompilerInstance &CI = getCompilerInstance();
  35     if (!CI.hasPreprocessor())
  36       return;
  37     if (!CI.hasSema())
  38       CI.createSema(getTranslationUnitKind(), nullptr);
  39   }
  40 };
  41
  42
  43 TEST(CodeGenTest, TestNullCodeGen) {
  44   auto Invocation = std::make_shared<CompilerInvocation>();
  45   Invocation->getPreprocessorOpts().addRemappedFile(
  46       "test.cc",
  47       MemoryBuffer::getMemBuffer("").release());
  48   Invocation->getFrontendOpts().Inputs.push_back(
  49       FrontendInputFile("test.cc", Language::CXX));
  50   Invocation->getFrontendOpts().ProgramAction = EmitLLVM;
  51   Invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
  52   CompilerInstance Compiler;
  53   Compiler.setInvocation(std::move(Invocation));
  54   Compiler.createDiagnostics();
  55   EXPECT_TRUE(Compiler.hasDiagnostics());
  56
  57   std::unique_ptr<FrontendAction> Act(new NullCodeGenAction);
  58   bool Success = Compiler.ExecuteAction(*Act);
  59   EXPECT_TRUE(Success);
  60 }
  61
  62 }