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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/StaticAnalyzer/Frontend/FrontendActions.h"
#include "clang/ARCMigrate/ARCMTActions.h"
#include "clang/CodeGen/CodeGenAction.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/OptTable.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/FrontendPluginRegistry.h"
#include "clang/Rewrite/FrontendActions.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/DynamicLibrary.h"
using namespace clang;
static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
using namespace clang::frontend;
switch (CI.getFrontendOpts().ProgramAction) {
case ASTDump: return new ASTDumpAction();
case ASTDumpXML: return new ASTDumpXMLAction();
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 PluginAction: {
for (FrontendPluginRegistry::iterator it =
FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
it != ie; ++it) {
if (it->getName() == CI.getFrontendOpts().ActionName) {
OwningPtr<PluginASTAction> P(it->instantiate());
if (!P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs))
return 0;
return P.take();
<< CI.getFrontendOpts().ActionName;
return 0;
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 RewriteObjC: return new RewriteObjCAction();
case RewriteTest: return new RewriteTestAction();
case RunAnalysis: return new ento::AnalysisAction();
case MigrateSource: return new arcmt::MigrateSourceAction();
case RunPreprocessorOnly: return new PreprocessOnlyAction();
llvm_unreachable("Invalid program action!");
static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
// Create the underlying action.
FrontendAction *Act = CreateFrontendBaseAction(CI);
if (!Act)
return 0;
const FrontendOptions &FEOpts = CI.getFrontendOpts();
if (FEOpts.FixAndRecompile) {
Act = new FixItRecompile(Act);
// 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,
FEOpts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals,
FEOpts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting);
// 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) {
OwningPtr<driver::OptTable> Opts(driver::createDriverOptTable());
Opts->PrintHelp(llvm::outs(), "clang -cc1",
"LLVM 'Clang' Compiler:");
return 0;
// Honor -version.
// FIXME: Use a better -version message?
if (Clang->getFrontendOpts().ShowVersion) {
return 0;
// 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();
const char **Args = new 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] = 0;
llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args);
// Honor -analyzer-checker-help.
// This should happen AFTER plugins have been loaded!
if (Clang->getAnalyzerOpts().ShowCheckerHelp) {
ento::printCheckerHelp(llvm::outs(), Clang->getFrontendOpts().Plugins);
return 0;
// If there were errors in processing arguments, don't do anything else.
bool Success = false;
if (!Clang->getDiagnostics().hasErrorOccurred()) {
// Create and execute the frontend action.
OwningPtr<FrontendAction> Act(CreateFrontendAction(*Clang));
if (Act) {
Success = Clang->ExecuteAction(*Act);
if (Clang->getFrontendOpts().DisableFree)
return Success;