forked from OSchip/llvm-project
306 lines
11 KiB
C++
306 lines
11 KiB
C++
//===-- cc1_main.cpp - Clang CC1 Compiler Frontend ------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the entry point to the clang -cc1 functionality, which implements the
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// core compiler functionality along with a number of additional tools for
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// demonstration and testing purposes.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Checker/FrontendActions.h"
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#include "clang/CodeGen/CodeGenAction.h"
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#include "clang/Driver/Arg.h"
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#include "clang/Driver/ArgList.h"
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#include "clang/Driver/CC1Options.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "clang/Driver/OptTable.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/FrontendActions.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "clang/Frontend/FrontendPluginRegistry.h"
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#include "clang/Frontend/TextDiagnosticBuffer.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Rewrite/FrontendActions.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/System/DynamicLibrary.h"
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#include "llvm/Target/TargetSelect.h"
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#include <cstdio>
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Main driver
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//===----------------------------------------------------------------------===//
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static void LLVMErrorHandler(void *UserData, const std::string &Message) {
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Diagnostic &Diags = *static_cast<Diagnostic*>(UserData);
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Diags.Report(diag::err_fe_error_backend) << Message;
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// We cannot recover from llvm errors.
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exit(1);
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}
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static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
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using namespace clang::frontend;
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switch (CI.getFrontendOpts().ProgramAction) {
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default:
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llvm_unreachable("Invalid program action!");
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case ASTDump: return new ASTDumpAction();
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case ASTPrint: return new ASTPrintAction();
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case ASTPrintXML: return new ASTPrintXMLAction();
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case ASTView: return new ASTViewAction();
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case BoostCon: return new BoostConAction();
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case DumpRawTokens: return new DumpRawTokensAction();
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case DumpTokens: return new DumpTokensAction();
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case EmitAssembly: return new EmitAssemblyAction();
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case EmitBC: return new EmitBCAction();
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case EmitHTML: return new HTMLPrintAction();
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case EmitLLVM: return new EmitLLVMAction();
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case EmitLLVMOnly: return new EmitLLVMOnlyAction();
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case EmitCodeGenOnly: return new EmitCodeGenOnlyAction();
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case EmitObj: return new EmitObjAction();
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case FixIt: return new FixItAction();
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case GeneratePCH: return new GeneratePCHAction();
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case GeneratePTH: return new GeneratePTHAction();
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case InheritanceView: return new InheritanceViewAction();
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case InitOnly: return new InitOnlyAction();
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case ParseNoop: return new ParseOnlyAction();
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case ParsePrintCallbacks: return new PrintParseAction();
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case ParseSyntaxOnly: return new SyntaxOnlyAction();
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case PluginAction: {
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for (FrontendPluginRegistry::iterator it =
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FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
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it != ie; ++it) {
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if (it->getName() == CI.getFrontendOpts().ActionName) {
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PluginASTAction* plugin = it->instantiate();
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plugin->ParseArgs(CI.getFrontendOpts().PluginArgs);
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return plugin;
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}
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}
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CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)
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<< CI.getFrontendOpts().ActionName;
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return 0;
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}
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case PrintDeclContext: return new DeclContextPrintAction();
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case PrintPreprocessedInput: return new PrintPreprocessedAction();
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case RewriteMacros: return new RewriteMacrosAction();
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case RewriteObjC: return new RewriteObjCAction();
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case RewriteTest: return new RewriteTestAction();
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case RunAnalysis: return new AnalysisAction();
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case RunPreprocessorOnly: return new PreprocessOnlyAction();
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}
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}
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static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
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// Create the underlying action.
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FrontendAction *Act = CreateFrontendBaseAction(CI);
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if (!Act)
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return 0;
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// If there are any AST files to merge, create a frontend action
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// adaptor to perform the merge.
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if (!CI.getFrontendOpts().ASTMergeFiles.empty())
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Act = new ASTMergeAction(Act, &CI.getFrontendOpts().ASTMergeFiles[0],
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CI.getFrontendOpts().ASTMergeFiles.size());
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return Act;
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}
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// FIXME: Define the need for this testing away.
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static int cc1_test(Diagnostic &Diags,
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const char **ArgBegin, const char **ArgEnd) {
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using namespace clang::driver;
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llvm::errs() << "cc1 argv:";
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for (const char **i = ArgBegin; i != ArgEnd; ++i)
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llvm::errs() << " \"" << *i << '"';
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llvm::errs() << "\n";
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// Parse the arguments.
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OptTable *Opts = createCC1OptTable();
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unsigned MissingArgIndex, MissingArgCount;
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InputArgList *Args = Opts->ParseArgs(ArgBegin, ArgEnd,
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MissingArgIndex, MissingArgCount);
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// Check for missing argument error.
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if (MissingArgCount)
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Diags.Report(clang::diag::err_drv_missing_argument)
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<< Args->getArgString(MissingArgIndex) << MissingArgCount;
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// Dump the parsed arguments.
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llvm::errs() << "cc1 parsed options:\n";
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for (ArgList::const_iterator it = Args->begin(), ie = Args->end();
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it != ie; ++it)
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(*it)->dump();
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// Create a compiler invocation.
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llvm::errs() << "cc1 creating invocation.\n";
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CompilerInvocation Invocation;
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CompilerInvocation::CreateFromArgs(Invocation, ArgBegin, ArgEnd, Diags);
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// Convert the invocation back to argument strings.
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std::vector<std::string> InvocationArgs;
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Invocation.toArgs(InvocationArgs);
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// Dump the converted arguments.
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llvm::SmallVector<const char*, 32> Invocation2Args;
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llvm::errs() << "invocation argv :";
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for (unsigned i = 0, e = InvocationArgs.size(); i != e; ++i) {
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Invocation2Args.push_back(InvocationArgs[i].c_str());
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llvm::errs() << " \"" << InvocationArgs[i] << '"';
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}
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llvm::errs() << "\n";
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// Convert those arguments to another invocation, and check that we got the
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// same thing.
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CompilerInvocation Invocation2;
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CompilerInvocation::CreateFromArgs(Invocation2, Invocation2Args.begin(),
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Invocation2Args.end(), Diags);
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// FIXME: Implement CompilerInvocation comparison.
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if (true) {
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//llvm::errs() << "warning: Invocations differ!\n";
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std::vector<std::string> Invocation2Args;
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Invocation2.toArgs(Invocation2Args);
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llvm::errs() << "invocation2 argv:";
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for (unsigned i = 0, e = Invocation2Args.size(); i != e; ++i)
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llvm::errs() << " \"" << Invocation2Args[i] << '"';
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llvm::errs() << "\n";
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}
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return 0;
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}
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int cc1_main(const char **ArgBegin, const char **ArgEnd,
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const char *Argv0, void *MainAddr) {
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llvm::OwningPtr<CompilerInstance> Clang(new CompilerInstance());
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Clang->setLLVMContext(new llvm::LLVMContext());
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// Run clang -cc1 test.
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if (ArgBegin != ArgEnd && llvm::StringRef(ArgBegin[0]) == "-cc1test") {
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TextDiagnosticPrinter DiagClient(llvm::errs(), DiagnosticOptions());
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Diagnostic Diags(&DiagClient);
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return cc1_test(Diags, ArgBegin + 1, ArgEnd);
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}
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// Initialize targets first, so that --version shows registered targets.
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llvm::InitializeAllTargets();
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llvm::InitializeAllAsmPrinters();
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llvm::InitializeAllAsmParsers();
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// Buffer diagnostics from argument parsing so that we can output them using a
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// well formed diagnostic object.
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TextDiagnosticBuffer DiagsBuffer;
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Diagnostic Diags(&DiagsBuffer);
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CompilerInvocation::CreateFromArgs(Clang->getInvocation(), ArgBegin, ArgEnd,
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Diags);
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// Infer the builtin include path if unspecified.
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if (Clang->getHeaderSearchOpts().UseBuiltinIncludes &&
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Clang->getHeaderSearchOpts().ResourceDir.empty())
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Clang->getHeaderSearchOpts().ResourceDir =
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CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
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// Honor -help.
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if (Clang->getFrontendOpts().ShowHelp) {
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llvm::OwningPtr<driver::OptTable> Opts(driver::createCC1OptTable());
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Opts->PrintHelp(llvm::outs(), "clang -cc1",
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"LLVM 'Clang' Compiler: http://clang.llvm.org");
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return 0;
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}
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// Honor -version.
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//
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// FIXME: Use a better -version message?
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if (Clang->getFrontendOpts().ShowVersion) {
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llvm::cl::PrintVersionMessage();
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return 0;
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}
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// Honor -mllvm.
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//
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// FIXME: Remove this, one day.
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if (!Clang->getFrontendOpts().LLVMArgs.empty()) {
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unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();
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const char **Args = new const char*[NumArgs + 2];
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Args[0] = "clang (LLVM option parsing)";
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for (unsigned i = 0; i != NumArgs; ++i)
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Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();
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Args[NumArgs + 1] = 0;
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llvm::cl::ParseCommandLineOptions(NumArgs + 1, const_cast<char **>(Args));
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}
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// Create the actual diagnostics engine.
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Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin));
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if (!Clang->hasDiagnostics())
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return 1;
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// Set an error handler, so that any LLVM backend diagnostics go through our
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// error handler.
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llvm::install_fatal_error_handler(LLVMErrorHandler,
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static_cast<void*>(&Clang->getDiagnostics()));
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DiagsBuffer.FlushDiagnostics(Clang->getDiagnostics());
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// Load any requested plugins.
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for (unsigned i = 0,
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e = Clang->getFrontendOpts().Plugins.size(); i != e; ++i) {
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const std::string &Path = Clang->getFrontendOpts().Plugins[i];
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std::string Error;
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if (llvm::sys::DynamicLibrary::LoadLibraryPermanently(Path.c_str(), &Error))
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Diags.Report(diag::err_fe_unable_to_load_plugin) << Path << Error;
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}
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// If there were errors in processing arguments, don't do anything else.
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bool Success = false;
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if (!Clang->getDiagnostics().getNumErrors()) {
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// Create and execute the frontend action.
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llvm::OwningPtr<FrontendAction> Act(CreateFrontendAction(*Clang));
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if (Act) {
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Success = Clang->ExecuteAction(*Act);
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if (Clang->getFrontendOpts().DisableFree)
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Act.take();
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}
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}
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// If any timers were active but haven't been destroyed yet, print their
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// results now. This happens in -disable-free mode.
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llvm::TimerGroup::printAll(llvm::errs());
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// When running with -disable-free, don't do any destruction or shutdown.
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if (Clang->getFrontendOpts().DisableFree) {
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if (Clang->getFrontendOpts().ShowStats)
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llvm::PrintStatistics();
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Clang.take();
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return !Success;
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}
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// Managed static deconstruction. Useful for making things like
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// -time-passes usable.
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llvm::llvm_shutdown();
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return !Success;
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}
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