lib/FrontendTool/ExecuteCompilerInvocation.cpp

   1 //===--- ExecuteCompilerInvocation.cpp ------------------------------------===//
   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 // This file holds ExecuteCompilerInvocation(). It is split into its own file to
  11 // minimize the impact of pulling in essentially everything else in Clang.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "clang/FrontendTool/Utils.h"
  16 #include "clang/GR/FrontendActions.h"
  17 #include "clang/CodeGen/CodeGenAction.h"
  18 #include "clang/Driver/CC1Options.h"
  19 #include "clang/Driver/OptTable.h"
  20 #include "clang/Frontend/CompilerInvocation.h"
  21 #include "clang/Frontend/CompilerInstance.h"
  22 #include "clang/Frontend/FrontendActions.h"
  23 #include "clang/Frontend/FrontendDiagnostic.h"
  24 #include "clang/Frontend/FrontendPluginRegistry.h"
  25 #include "clang/Rewrite/FrontendActions.h"
  26 #include "llvm/Support/ErrorHandling.h"
  27 #include "llvm/Support/DynamicLibrary.h"
  28 using namespace clang;
  29
  30 static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
  31   using namespace clang::frontend;
  32
  33   switch (CI.getFrontendOpts().ProgramAction) {
  34   default:
  35     llvm_unreachable("Invalid program action!");
  36
  37   case ASTDump:                return new ASTDumpAction();
  38   case ASTDumpXML:             return new ASTDumpXMLAction();
  39   case ASTPrint:               return new ASTPrintAction();
  40   case ASTPrintXML:            return new ASTPrintXMLAction();
  41   case ASTView:                return new ASTViewAction();
  42   case BoostCon:               return new BoostConAction();
  43   case CreateModule:           return 0;
  44   case DumpRawTokens:          return new DumpRawTokensAction();
  45   case DumpTokens:             return new DumpTokensAction();
  46   case EmitAssembly:           return new EmitAssemblyAction();
  47   case EmitBC:                 return new EmitBCAction();
  48   case EmitHTML:               return new HTMLPrintAction();
  49   case EmitLLVM:               return new EmitLLVMAction();
  50   case EmitLLVMOnly:           return new EmitLLVMOnlyAction();
  51   case EmitCodeGenOnly:        return new EmitCodeGenOnlyAction();
  52   case EmitObj:                return new EmitObjAction();
  53   case FixIt:                  return new FixItAction();
  54   case GeneratePCH:            return new GeneratePCHAction();
  55   case GeneratePTH:            return new GeneratePTHAction();
  56   case InheritanceView:        return new InheritanceViewAction();
  57   case InitOnly:               return new InitOnlyAction();
  58   case ParseSyntaxOnly:        return new SyntaxOnlyAction();
  59
  60   case PluginAction: {
  61     for (FrontendPluginRegistry::iterator it =
  62            FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
  63          it != ie; ++it) {
  64       if (it->getName() == CI.getFrontendOpts().ActionName) {
  65         llvm::OwningPtr<PluginASTAction> P(it->instantiate());
  66         if (!P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs))
  67           return 0;
  68         return P.take();
  69       }
  70     }
  71
  72     CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)
  73       << CI.getFrontendOpts().ActionName;
  74     return 0;
  75   }
  76
  77   case PrintDeclContext:       return new DeclContextPrintAction();
  78   case PrintPreamble:          return new PrintPreambleAction();
  79   case PrintPreprocessedInput: return new PrintPreprocessedAction();
  80   case RewriteMacros:          return new RewriteMacrosAction();
  81   case RewriteObjC:            return new RewriteObjCAction();
  82   case RewriteTest:            return new RewriteTestAction();
  83   case RunAnalysis:            return new GR::AnalysisAction();
  84   case RunPreprocessorOnly:    return new PreprocessOnlyAction();
  85   }
  86 }
  87
  88 static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
  89   // Create the underlying action.
  90   FrontendAction *Act = CreateFrontendBaseAction(CI);
  91   if (!Act)
  92     return 0;
  93
  94   // If there are any AST files to merge, create a frontend action
  95   // adaptor to perform the merge.
  96   if (!CI.getFrontendOpts().ASTMergeFiles.empty())
  97     Act = new ASTMergeAction(Act, &CI.getFrontendOpts().ASTMergeFiles[0],
  98                              CI.getFrontendOpts().ASTMergeFiles.size());
  99
 100   return Act;
 101 }
 102
 103 bool clang::ExecuteCompilerInvocation(CompilerInstance *Clang) {
 104   // Honor -help.
 105   if (Clang->getFrontendOpts().ShowHelp) {
 106     llvm::OwningPtr<driver::OptTable> Opts(driver::createCC1OptTable());
 107     Opts->PrintHelp(llvm::outs(), "clang -cc1",
 108                     "LLVM 'Clang' Compiler: http://clang.llvm.org");
 109     return 0;
 110   }
 111
 112   // Honor -version.
 113   //
 114   // FIXME: Use a better -version message?
 115   if (Clang->getFrontendOpts().ShowVersion) {
 116     llvm::cl::PrintVersionMessage();
 117     return 0;
 118   }
 119
 120   // Honor -mllvm.
 121   //
 122   // FIXME: Remove this, one day.
 123   if (!Clang->getFrontendOpts().LLVMArgs.empty()) {
 124     unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();
 125     const char **Args = new const char*[NumArgs + 2];
 126     Args[0] = "clang (LLVM option parsing)";
 127     for (unsigned i = 0; i != NumArgs; ++i)
 128       Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();
 129     Args[NumArgs + 1] = 0;
 130     llvm::cl::ParseCommandLineOptions(NumArgs + 1, const_cast<char **>(Args));
 131   }
 132
 133   // Load any requested plugins.
 134   for (unsigned i = 0,
 135          e = Clang->getFrontendOpts().Plugins.size(); i != e; ++i) {
 136     const std::string &Path = Clang->getFrontendOpts().Plugins[i];
 137     std::string Error;
 138     if (llvm::sys::DynamicLibrary::LoadLibraryPermanently(Path.c_str(), &Error))
 139       Clang->getDiagnostics().Report(diag::err_fe_unable_to_load_plugin)
 140         << Path << Error;
 141   }
 142
 143   // If there were errors in processing arguments, don't do anything else.
 144   bool Success = false;
 145   if (!Clang->getDiagnostics().hasErrorOccurred()) {
 146     // Create and execute the frontend action.
 147     llvm::OwningPtr<FrontendAction> Act(CreateFrontendAction(*Clang));
 148     if (Act) {
 149       Success = Clang->ExecuteAction(*Act);
 150       if (Clang->getFrontendOpts().DisableFree)
 151         Act.take();
 152     }
 153   }
 154
 155   return Success;
 156 }