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//===--- ExecuteCompilerInvocation.cpp ------------------------------------===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This file holds ExecuteCompilerInvocation(). It is split into its own file to
// minimize the impact of pulling in essentially everything else in Clang.
#include "clang/FrontendTool/Utils.h"
#include "clang/ARCMigrate/ARCMTActions.h"
#include "clang/CodeGen/CodeGenAction.h"
#include "clang/Driver/Options.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/FrontendPluginRegistry.h"
#include "clang/Frontend/Utils.h"
#include "clang/Rewrite/Frontend/FrontendActions.h"
#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/ErrorHandling.h"
using namespace clang;
using namespace llvm::opt;
static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
using namespace clang::frontend;
StringRef Action("unknown");
switch (CI.getFrontendOpts().ProgramAction) {
case ASTDeclList: return new ASTDeclListAction();
case ASTDump: return new ASTDumpAction();
case ASTPrint: return new ASTPrintAction();
case ASTView: return new ASTViewAction();
case DumpRawTokens: return new DumpRawTokensAction();
case DumpTokens: return new DumpTokensAction();
case EmitAssembly: return new EmitAssemblyAction();
case EmitBC: return new EmitBCAction();
case EmitHTML: return new HTMLPrintAction();
case EmitLLVM: return new EmitLLVMAction();
case EmitLLVMOnly: return new EmitLLVMOnlyAction();
case EmitCodeGenOnly: return new EmitCodeGenOnlyAction();
case EmitObj: return new EmitObjAction();
case FixIt: return new FixItAction();
case GenerateModule: return new GenerateModuleAction;
case GeneratePCH: return new GeneratePCHAction;
case GeneratePTH: return new GeneratePTHAction();
case InitOnly: return new InitOnlyAction();
case ParseSyntaxOnly: return new SyntaxOnlyAction();
case ModuleFileInfo: return new DumpModuleInfoAction();
case VerifyPCH: return new VerifyPCHAction();
case PluginAction: {
for (FrontendPluginRegistry::iterator it =
FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
it != ie; ++it) {
if (it->getName() == CI.getFrontendOpts().ActionName) {
std::unique_ptr<PluginASTAction> P(it->instantiate());
if (!P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs))
return nullptr;
return P.release();
<< CI.getFrontendOpts().ActionName;
return nullptr;
case PrintDeclContext: return new DeclContextPrintAction();
case PrintPreamble: return new PrintPreambleAction();
case PrintPreprocessedInput: {
if (CI.getPreprocessorOutputOpts().RewriteIncludes)
return new RewriteIncludesAction();
return new PrintPreprocessedAction();
case RewriteMacros: return new RewriteMacrosAction();
case RewriteTest: return new RewriteTestAction();
case RewriteObjC: return new RewriteObjCAction();
case RewriteObjC: Action = "RewriteObjC"; break;
case MigrateSource: return new arcmt::MigrateSourceAction();
case MigrateSource: Action = "MigrateSource"; break;
case RunAnalysis: return new ento::AnalysisAction();
case RunAnalysis: Action = "RunAnalysis"; break;
case RunPreprocessorOnly: return new PreprocessOnlyAction();
CI.getDiagnostics().Report(diag::err_fe_action_not_available) << Action;
return 0;
llvm_unreachable("Invalid program action!");
static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
// Create the underlying action.
FrontendAction *Act = CreateFrontendBaseAction(CI);
if (!Act)
return nullptr;
const FrontendOptions &FEOpts = CI.getFrontendOpts();
if (FEOpts.FixAndRecompile) {
Act = new FixItRecompile(Act);
if (CI.getFrontendOpts().ProgramAction != frontend::MigrateSource &&
CI.getFrontendOpts().ProgramAction != frontend::GeneratePCH) {
// Potentially wrap the base FE action in an ARC Migrate Tool action.
switch (FEOpts.ARCMTAction) {
case FrontendOptions::ARCMT_None:
case FrontendOptions::ARCMT_Check:
Act = new arcmt::CheckAction(Act);
case FrontendOptions::ARCMT_Modify:
Act = new arcmt::ModifyAction(Act);
case FrontendOptions::ARCMT_Migrate:
Act = new arcmt::MigrateAction(Act,
if (FEOpts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
Act = new arcmt::ObjCMigrateAction(Act, FEOpts.MTMigrateDir,
// If there are any AST files to merge, create a frontend action
// adaptor to perform the merge.
if (!FEOpts.ASTMergeFiles.empty())
Act = new ASTMergeAction(Act, FEOpts.ASTMergeFiles);
return Act;
bool clang::ExecuteCompilerInvocation(CompilerInstance *Clang) {
// Honor -help.
if (Clang->getFrontendOpts().ShowHelp) {
std::unique_ptr<OptTable> Opts(driver::createDriverOptTable());
Opts->PrintHelp(llvm::outs(), "clang -cc1",
"LLVM 'Clang' Compiler:",
/*Include=*/ driver::options::CC1Option, /*Exclude=*/ 0);
return true;
// Honor -version.
// FIXME: Use a better -version message?
if (Clang->getFrontendOpts().ShowVersion) {
return true;
// Load any requested plugins.
for (unsigned i = 0,
e = Clang->getFrontendOpts().Plugins.size(); i != e; ++i) {
const std::string &Path = Clang->getFrontendOpts().Plugins[i];
std::string Error;
if (llvm::sys::DynamicLibrary::LoadLibraryPermanently(Path.c_str(), &Error))
<< Path << Error;
// Honor -mllvm.
// FIXME: Remove this, one day.
// This should happen AFTER plugins have been loaded!
if (!Clang->getFrontendOpts().LLVMArgs.empty()) {
unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();
auto Args = llvm::make_unique<const char*[]>(NumArgs + 2);
Args[0] = "clang (LLVM option parsing)";
for (unsigned i = 0; i != NumArgs; ++i)
Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();
Args[NumArgs + 1] = nullptr;
llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args.get());
// Honor -analyzer-checker-help.
// This should happen AFTER plugins have been loaded!
if (Clang->getAnalyzerOpts()->ShowCheckerHelp) {
ento::printCheckerHelp(llvm::outs(), Clang->getFrontendOpts().Plugins);
return true;
// If there were errors in processing arguments, don't do anything else.
if (Clang->getDiagnostics().hasErrorOccurred())
return false;
// Create and execute the frontend action.
std::unique_ptr<FrontendAction> Act(CreateFrontendAction(*Clang));
if (!Act)
return false;
bool Success = Clang->ExecuteAction(*Act);
if (Clang->getFrontendOpts().DisableFree)
return Success;