FrontendActions.cpp revision b33fbaa5f14452b6dc2442e89266acb0810616fd 
1//===--- FrontendActions.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#include "clang/Frontend/FrontendActions.h"
11#include "clang/AST/ASTConsumer.h"
12#include "clang/Lex/Preprocessor.h"
13#include "clang/Parse/Parser.h"
14#include "clang/Basic/FileManager.h"
15#include "clang/Frontend/AnalysisConsumer.h"
16#include "clang/Frontend/ASTConsumers.h"
17#include "clang/Frontend/ASTUnit.h"
18#include "clang/Frontend/CompilerInstance.h"
19#include "clang/Frontend/FixItRewriter.h"
20#include "clang/Frontend/FrontendDiagnostic.h"
21#include "clang/Frontend/Utils.h"
22#include "llvm/Support/raw_ostream.h"
23using namespace clang;
24
25//===----------------------------------------------------------------------===//
26// AST Consumer Actions
27//===----------------------------------------------------------------------===//
28
29ASTConsumer *AnalysisAction::CreateASTConsumer(CompilerInstance &CI,
30                                               llvm::StringRef InFile) {
31  return CreateAnalysisConsumer(CI.getPreprocessor(),
32                                CI.getFrontendOpts().OutputFile,
33                                CI.getAnalyzerOpts());
34}
35
36ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
37                                               llvm::StringRef InFile) {
38  return CreateASTPrinter(CI.createDefaultOutputFile(false, InFile));
39}
40
41ASTConsumer *ASTPrintXMLAction::CreateASTConsumer(CompilerInstance &CI,
42                                                  llvm::StringRef InFile) {
43  return CreateASTPrinterXML(CI.createDefaultOutputFile(false, InFile,
44                                                        "xml"));
45}
46
47ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
48                                              llvm::StringRef InFile) {
49  return CreateASTDumper();
50}
51
52ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
53                                              llvm::StringRef InFile) {
54  return CreateASTViewer();
55}
56
57ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
58                                                       llvm::StringRef InFile) {
59  return CreateDeclContextPrinter();
60}
61
62ASTConsumer *DumpRecordAction::CreateASTConsumer(CompilerInstance &CI,
63                                                 llvm::StringRef InFile) {
64  return CreateRecordLayoutDumper();
65}
66
67ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
68                                                  llvm::StringRef InFile) {
69  const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
70  if (CI.getFrontendOpts().RelocatablePCH &&
71      Sysroot.empty()) {
72    CI.getDiagnostics().Report(diag::err_relocatable_without_without_isysroot);
73    return 0;
74  }
75
76  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, InFile);
77  if (CI.getFrontendOpts().RelocatablePCH)
78    return CreatePCHGenerator(CI.getPreprocessor(), OS, Sysroot.c_str());
79
80  return CreatePCHGenerator(CI.getPreprocessor(), OS);
81}
82
83ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
84                                                llvm::StringRef InFile) {
85  return CreateHTMLPrinter(CI.createDefaultOutputFile(false, InFile),
86                           CI.getPreprocessor());
87}
88
89ASTConsumer *InheritanceViewAction::CreateASTConsumer(CompilerInstance &CI,
90                                                      llvm::StringRef InFile) {
91  return CreateInheritanceViewer(CI.getFrontendOpts().ViewClassInheritance);
92}
93
94FixItAction::FixItAction() {}
95FixItAction::~FixItAction() {}
96
97ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
98                                            llvm::StringRef InFile) {
99  return new ASTConsumer();
100}
101
102/// AddFixItLocations - Add any individual user specified "fix-it" locations,
103/// and return true on success.
104static bool AddFixItLocations(CompilerInstance &CI,
105                              FixItRewriter &FixItRewrite) {
106  const std::vector<ParsedSourceLocation> &Locs =
107    CI.getFrontendOpts().FixItLocations;
108  for (unsigned i = 0, e = Locs.size(); i != e; ++i) {
109    const FileEntry *File = CI.getFileManager().getFile(Locs[i].FileName);
110    if (!File) {
111      CI.getDiagnostics().Report(diag::err_fe_unable_to_find_fixit_file)
112        << Locs[i].FileName;
113      return false;
114    }
115
116    RequestedSourceLocation Requested;
117    Requested.File = File;
118    Requested.Line = Locs[i].Line;
119    Requested.Column = Locs[i].Column;
120    FixItRewrite.addFixItLocation(Requested);
121  }
122
123  return true;
124}
125
126bool FixItAction::BeginSourceFileAction(CompilerInstance &CI,
127                                        llvm::StringRef Filename) {
128  Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
129                                   CI.getLangOpts()));
130  if (!AddFixItLocations(CI, *Rewriter))
131    return false;
132
133  return true;
134}
135
136void FixItAction::EndSourceFileAction() {
137  const FrontendOptions &FEOpts = getCompilerInstance().getFrontendOpts();
138  Rewriter->WriteFixedFile(getCurrentFile(), FEOpts.OutputFile);
139}
140
141ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
142                                                  llvm::StringRef InFile) {
143  return CreateObjCRewriter(InFile,
144                            CI.createDefaultOutputFile(true, InFile, "cpp"),
145                            CI.getDiagnostics(), CI.getLangOpts(),
146                            CI.getDiagnosticOpts().NoRewriteMacros);
147}
148
149ASTConsumer *RewriteBlocksAction::CreateASTConsumer(CompilerInstance &CI,
150                                                    llvm::StringRef InFile) {
151  return CreateBlockRewriter(InFile, CI.getDiagnostics(), CI.getLangOpts());
152}
153
154ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
155                                                 llvm::StringRef InFile) {
156  return new ASTConsumer();
157}
158
159CodeGenAction::CodeGenAction(unsigned _Act) : Act(_Act) {}
160
161ASTConsumer *CodeGenAction::CreateASTConsumer(CompilerInstance &CI,
162                                              llvm::StringRef InFile) {
163  BackendAction BA = static_cast<BackendAction>(Act);
164  llvm::OwningPtr<llvm::raw_ostream> OS;
165  if (BA == Backend_EmitAssembly)
166    OS.reset(CI.createDefaultOutputFile(false, InFile, "s"));
167  else if (BA == Backend_EmitLL)
168    OS.reset(CI.createDefaultOutputFile(false, InFile, "ll"));
169  else if (BA == Backend_EmitBC)
170    OS.reset(CI.createDefaultOutputFile(true, InFile, "bc"));
171
172  return CreateBackendConsumer(BA, CI.getDiagnostics(), CI.getLangOpts(),
173                               CI.getCodeGenOpts(), CI.getTargetOpts(),
174                               CI.getFrontendOpts().ShowTimers, InFile,
175                               OS.take(), CI.getLLVMContext());
176}
177
178EmitAssemblyAction::EmitAssemblyAction()
179  : CodeGenAction(Backend_EmitAssembly) {}
180
181EmitBCAction::EmitBCAction() : CodeGenAction(Backend_EmitBC) {}
182
183EmitLLVMAction::EmitLLVMAction() : CodeGenAction(Backend_EmitLL) {}
184
185EmitLLVMOnlyAction::EmitLLVMOnlyAction() : CodeGenAction(Backend_EmitNothing) {}
186
187//===----------------------------------------------------------------------===//
188// Preprocessor Actions
189//===----------------------------------------------------------------------===//
190
191void DumpRawTokensAction::ExecuteAction() {
192  Preprocessor &PP = getCompilerInstance().getPreprocessor();
193  SourceManager &SM = PP.getSourceManager();
194
195  // Start lexing the specified input file.
196  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
197  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOptions());
198  RawLex.SetKeepWhitespaceMode(true);
199
200  Token RawTok;
201  RawLex.LexFromRawLexer(RawTok);
202  while (RawTok.isNot(tok::eof)) {
203    PP.DumpToken(RawTok, true);
204    llvm::errs() << "\n";
205    RawLex.LexFromRawLexer(RawTok);
206  }
207}
208
209void DumpTokensAction::ExecuteAction() {
210  Preprocessor &PP = getCompilerInstance().getPreprocessor();
211  // Start preprocessing the specified input file.
212  Token Tok;
213  PP.EnterMainSourceFile();
214  do {
215    PP.Lex(Tok);
216    PP.DumpToken(Tok, true);
217    llvm::errs() << "\n";
218  } while (Tok.isNot(tok::eof));
219}
220
221void GeneratePTHAction::ExecuteAction() {
222  CompilerInstance &CI = getCompilerInstance();
223  if (CI.getFrontendOpts().OutputFile.empty() ||
224      CI.getFrontendOpts().OutputFile == "-") {
225    // FIXME: Don't fail this way.
226    // FIXME: Verify that we can actually seek in the given file.
227    llvm::llvm_report_error("PTH requires a seekable file for output!");
228  }
229  llvm::raw_fd_ostream *OS =
230    CI.createDefaultOutputFile(true, getCurrentFile());
231  CacheTokens(CI.getPreprocessor(), OS);
232}
233
234void ParseOnlyAction::ExecuteAction() {
235  Preprocessor &PP = getCompilerInstance().getPreprocessor();
236  llvm::OwningPtr<Action> PA(new MinimalAction(PP));
237
238  Parser P(PP, *PA);
239  PP.EnterMainSourceFile();
240  P.ParseTranslationUnit();
241}
242
243void PreprocessOnlyAction::ExecuteAction() {
244  Preprocessor &PP = getCompilerInstance().getPreprocessor();
245
246  Token Tok;
247  // Start parsing the specified input file.
248  PP.EnterMainSourceFile();
249  do {
250    PP.Lex(Tok);
251  } while (Tok.isNot(tok::eof));
252}
253
254void PrintParseAction::ExecuteAction() {
255  CompilerInstance &CI = getCompilerInstance();
256  Preprocessor &PP = getCompilerInstance().getPreprocessor();
257  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
258  llvm::OwningPtr<Action> PA(CreatePrintParserActionsAction(PP, OS));
259
260  Parser P(PP, *PA);
261  PP.EnterMainSourceFile();
262  P.ParseTranslationUnit();
263}
264
265void PrintPreprocessedAction::ExecuteAction() {
266  CompilerInstance &CI = getCompilerInstance();
267  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
268  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
269                           CI.getPreprocessorOutputOpts());
270}
271
272void RewriteMacrosAction::ExecuteAction() {
273  CompilerInstance &CI = getCompilerInstance();
274  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
275  RewriteMacrosInInput(CI.getPreprocessor(), OS);
276}
277
278void RewriteTestAction::ExecuteAction() {
279  CompilerInstance &CI = getCompilerInstance();
280  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
281  DoRewriteTest(CI.getPreprocessor(), OS);
282}
283