path: root/Driver/clang.cpp

//===--- clang.cpp - C-Language Front-end ---------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This utility may be invoked in the following manner:
//   clang --help                - Output help info.
//   clang [options]             - Read from stdin.
//   clang [options] file        - Read from "file".
//   clang [options] file1 file2 - Read these files.
//
//===----------------------------------------------------------------------===//
//
// TODO: Options to support:
//
//   -ffatal-errors
//   -ftabstop=width
//
//===----------------------------------------------------------------------===//

#include "clang.h"
#include "ASTConsumers.h"
#include "TextDiagnosticBuffer.h"
#include "TextDiagnosticPrinter.h"
#include "clang/AST/TranslationUnit.h"
#include "clang/Sema/ASTStreamer.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/Parse/Parser.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/System/Signals.h"
#include "llvm/Config/config.h"
#include "llvm/ADT/scoped_ptr.h"
#include <memory>
using namespace clang;

//===----------------------------------------------------------------------===//
// Global options.
//===----------------------------------------------------------------------===//

static llvm::cl::opt<bool>
Verbose("v", llvm::cl::desc("Enable verbose output"));
static llvm::cl::opt<bool>
Stats("stats", llvm::cl::desc("Print performance metrics and statistics"));

enum ProgActions {
  RewriteTest,                  // Rewriter testing stuff.
  EmitLLVM,                     // Emit a .ll file.
  SerializeAST,                 // Emit a .ast file.
  ASTPrint,                     // Parse ASTs and print them.
  ASTDump,                      // Parse ASTs and dump them.
  ASTView,                      // Parse ASTs and view them in Graphviz.
  ParseCFGDump,                 // Parse ASTS. Build CFGs. Print CFGs.
  ParseCFGView,                 // Parse ASTS. Build CFGs. View CFGs.
  AnalysisLiveVariables,        // Print results of live-variable analysis.
  WarnDeadStores,               // Run DeadStores checker on parsed ASTs.
  WarnDeadStoresCheck,          // Check diagnostics for "DeadStores".
  WarnUninitVals,               // Run UnitializedVariables checker.
  TestSerialization,            // Run experimental serialization code.
  ParsePrintCallbacks,          // Parse and print each callback.
  ParseSyntaxOnly,              // Parse and perform semantic analysis.
  ParseNoop,                    // Parse with noop callbacks.
  RunPreprocessorOnly,          // Just lex, no output.
  PrintPreprocessedInput,       // -E mode.
  DumpTokens                    // Token dump mode.
};

static llvm::cl::opt<ProgActions> 
ProgAction(llvm::cl::desc("Choose output type:"), llvm::cl::ZeroOrMore,
           llvm::cl::init(ParseSyntaxOnly),
           llvm::cl::values(
             clEnumValN(RunPreprocessorOnly, "Eonly",
                        "Just run preprocessor, no output (for timings)"),
             clEnumValN(PrintPreprocessedInput, "E",
                        "Run preprocessor, emit preprocessed file"),
             clEnumValN(DumpTokens, "dumptokens",
                        "Run preprocessor, dump internal rep of tokens"),
             clEnumValN(ParseNoop, "parse-noop",
                        "Run parser with noop callbacks (for timings)"),
             clEnumValN(ParseSyntaxOnly, "fsyntax-only",
                        "Run parser and perform semantic analysis"),
             clEnumValN(ParsePrintCallbacks, "parse-print-callbacks",
                        "Run parser and print each callback invoked"),
             clEnumValN(ASTPrint, "ast-print",
                        "Build ASTs and then pretty-print them"),
             clEnumValN(ASTDump, "ast-dump",
                        "Build ASTs and then debug dump them"),
             clEnumValN(ASTView, "ast-view",
                        "Build ASTs and view them with GraphViz."),
             clEnumValN(ParseCFGDump, "dump-cfg",
                        "Run parser, then build and print CFGs."),
             clEnumValN(ParseCFGView, "view-cfg",
                        "Run parser, then build and view CFGs with Graphviz."),
             clEnumValN(AnalysisLiveVariables, "dump-live-variables",
                        "Print results of live variable analysis."),
             clEnumValN(WarnDeadStores, "warn-dead-stores",
                        "Flag warnings of stores to dead variables."),
             clEnumValN(WarnUninitVals, "warn-uninit-values",
                        "Flag warnings of uses of unitialized variables."),
             clEnumValN(Te