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/StaticAnalyzer/Frontend/FrontendActions.h"
17 #include "clang/ARCMigrate/ARCMTActions.h"
18 #include "clang/CodeGen/CodeGenAction.h"
19 #include "clang/Driver/CC1Options.h"
20 #include "clang/Driver/OptTable.h"
21 #include "clang/Frontend/CompilerInvocation.h"
22 #include "clang/Frontend/CompilerInstance.h"
23 #include "clang/Frontend/FrontendActions.h"
24 #include "clang/Frontend/FrontendDiagnostic.h"
25 #include "clang/Frontend/FrontendPluginRegistry.h"
26 #include "clang/Rewrite/FrontendActions.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/DynamicLibrary.h"
29 using namespace clang;
30
CreateFrontendBaseAction(CompilerInstance & CI)31 static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
32 using namespace clang::frontend;
33
34 switch (CI.getFrontendOpts().ProgramAction) {
35 default:
36 llvm_unreachable("Invalid program action!");
37
38 case ASTDump: return new ASTDumpAction();
39 case ASTDumpXML: return new ASTDumpXMLAction();
40 case ASTPrint: return new ASTPrintAction();
41 case ASTView: return new ASTViewAction();
42 case CreateModule: return 0;
43 case DumpRawTokens: return new DumpRawTokensAction();
44 case DumpTokens: return new DumpTokensAction();
45 case EmitAssembly: return new EmitAssemblyAction();
46 case EmitBC: return new EmitBCAction();
47 case EmitHTML: return new HTMLPrintAction();
48 case EmitLLVM: return new EmitLLVMAction();
49 case EmitLLVMOnly: return new EmitLLVMOnlyAction();
50 case EmitCodeGenOnly: return new EmitCodeGenOnlyAction();
51 case EmitObj: return new EmitObjAction();
52 case FixIt: return new FixItAction();
53 case GeneratePCH: return new GeneratePCHAction();
54 case GeneratePTH: return new GeneratePTHAction();
55 case InitOnly: return new InitOnlyAction();
56 case ParseSyntaxOnly: return new SyntaxOnlyAction();
57
58 case PluginAction: {
59 for (FrontendPluginRegistry::iterator it =
60 FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
61 it != ie; ++it) {
62 if (it->getName() == CI.getFrontendOpts().ActionName) {
63 llvm::OwningPtr<PluginASTAction> P(it->instantiate());
64 if (!P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs))
65 return 0;
66 return P.take();
67 }
68 }
69
70 CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)
71 << CI.getFrontendOpts().ActionName;
72 return 0;
73 }
74
75 case PrintDeclContext: return new DeclContextPrintAction();
76 case PrintPreamble: return new PrintPreambleAction();
77 case PrintPreprocessedInput: return new PrintPreprocessedAction();
78 case RewriteMacros: return new RewriteMacrosAction();
79 case RewriteObjC: return new RewriteObjCAction();
80 case RewriteTest: return new RewriteTestAction();
81 case RunAnalysis: return new ento::AnalysisAction();
82 case RunPreprocessorOnly: return new PreprocessOnlyAction();
83 }
84 }
85
CreateFrontendAction(CompilerInstance & CI)86 static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
87 // Create the underlying action.
88 FrontendAction *Act = CreateFrontendBaseAction(CI);
89 if (!Act)
90 return 0;
91
92 // Potentially wrap the base FE action in an ARC Migrate Tool action.
93 switch (CI.getFrontendOpts().ARCMTAction) {
94 case FrontendOptions::ARCMT_None:
95 break;
96 case FrontendOptions::ARCMT_Check:
97 Act = new arcmt::CheckAction(Act);
98 break;
99 case FrontendOptions::ARCMT_Modify:
100 Act = new arcmt::ModifyAction(Act);
101 break;
102 case FrontendOptions::ARCMT_Migrate:
103 Act = new arcmt::MigrateAction(Act,
104 CI.getFrontendOpts().ARCMTMigrateDir,
105 CI.getFrontendOpts().ARCMTMigrateReportOut,
106 CI.getFrontendOpts().ARCMTMigrateEmitARCErrors);
107 break;
108 }
109
110 // If there are any AST files to merge, create a frontend action
111 // adaptor to perform the merge.
112 if (!CI.getFrontendOpts().ASTMergeFiles.empty())
113 Act = new ASTMergeAction(Act, &CI.getFrontendOpts().ASTMergeFiles[0],
114 CI.getFrontendOpts().ASTMergeFiles.size());
115
116 return Act;
117 }
118
ExecuteCompilerInvocation(CompilerInstance * Clang)119 bool clang::ExecuteCompilerInvocation(CompilerInstance *Clang) {
120 // Honor -help.
121 if (Clang->getFrontendOpts().ShowHelp) {
122 llvm::OwningPtr<driver::OptTable> Opts(driver::createCC1OptTable());
123 Opts->PrintHelp(llvm::outs(), "clang -cc1",
124 "LLVM 'Clang' Compiler: http://clang.llvm.org");
125 return 0;
126 }
127
128 // Honor -analyzer-checker-help.
129 if (Clang->getAnalyzerOpts().ShowCheckerHelp) {
130 ento::printCheckerHelp(llvm::outs());
131 return 0;
132 }
133
134 // Honor -version.
135 //
136 // FIXME: Use a better -version message?
137 if (Clang->getFrontendOpts().ShowVersion) {
138 llvm::cl::PrintVersionMessage();
139 return 0;
140 }
141
142 // Honor -mllvm.
143 //
144 // FIXME: Remove this, one day.
145 if (!Clang->getFrontendOpts().LLVMArgs.empty()) {
146 unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();
147 const char **Args = new const char*[NumArgs + 2];
148 Args[0] = "clang (LLVM option parsing)";
149 for (unsigned i = 0; i != NumArgs; ++i)
150 Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();
151 Args[NumArgs + 1] = 0;
152 llvm::cl::ParseCommandLineOptions(NumArgs + 1, const_cast<char **>(Args));
153 }
154
155 // Load any requested plugins.
156 for (unsigned i = 0,
157 e = Clang->getFrontendOpts().Plugins.size(); i != e; ++i) {
158 const std::string &Path = Clang->getFrontendOpts().Plugins[i];
159 std::string Error;
160 if (llvm::sys::DynamicLibrary::LoadLibraryPermanently(Path.c_str(), &Error))
161 Clang->getDiagnostics().Report(diag::err_fe_unable_to_load_plugin)
162 << Path << Error;
163 }
164
165 // If there were errors in processing arguments, don't do anything else.
166 bool Success = false;
167 if (!Clang->getDiagnostics().hasErrorOccurred()) {
168 // Create and execute the frontend action.
169 llvm::OwningPtr<FrontendAction> Act(CreateFrontendAction(*Clang));
170 if (Act) {
171 Success = Clang->ExecuteAction(*Act);
172 if (Clang->getFrontendOpts().DisableFree)
173 Act.take();
174 }
175 }
176
177 return Success;
178 }
179