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//===--- clang.cpp - C-Language Front-end ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file 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:
//
// -Wfatal-errors
// -ftabstop=width
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/AnalysisConsumer.h"
#include "clang/Frontend/ASTConsumers.h"
#include "clang/Frontend/CompileOptions.h"
#include "clang/Frontend/FixItRewriter.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/InitHeaderSearch.h"
#include "clang/Frontend/InitPreprocessor.h"
#include "clang/Frontend/PathDiagnosticClients.h"
#include "clang/Frontend/PCHReader.h"
#include "clang/Frontend/TextDiagnosticBuffer.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Frontend/CommandLineSourceLoc.h"
#include "clang/Frontend/Utils.h"
#include "clang/Analysis/PathDiagnostic.h"
#include "clang/CodeGen/ModuleBuilder.h"
#include "clang/Sema/ParseAST.h"
#include "clang/Sema/SemaDiagnostic.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclGroup.h"
#include "clang/Parse/Parser.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Version.h"
#include "llvm/LLVMContext.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Config/config.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PluginLoader.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Streams.h"
#include "llvm/Support/Timer.h"
#include "llvm/System/Host.h"
#include "llvm/System/Path.h"
#include "llvm/System/Process.h"
#include "llvm/System/Program.h"
#include "llvm/System/Signals.h"
#include "llvm/Target/TargetSelect.h"
#include <cstdlib>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
using namespace clang;
//===----------------------------------------------------------------------===//
// Source Location Parser
//===----------------------------------------------------------------------===//
static bool ResolveParsedLocation(ParsedSourceLocation &ParsedLoc,
FileManager &FileMgr,
RequestedSourceLocation &Result) {
const FileEntry *File = FileMgr.getFile(ParsedLoc.FileName);
if (!File)
return true;
Result.File = File;
Result.Line = ParsedLoc.Line;
Result.Column = ParsedLoc.Column;
return false;
}
//===----------------------------------------------------------------------===//
// Global options.
//===----------------------------------------------------------------------===//
/// ClangFrontendTimer - The front-end activities should charge time to it with
/// TimeRegion. The -ftime-report option controls whether this will do
/// anything.
llvm::Timer *ClangFrontendTimer = 0;
static bool HadErrors = false;
static llvm::cl::opt<bool>
Verbose("v", llvm::cl::desc("Enable verbose output"));
static llvm::cl::opt<bool>
Stats("print-stats",
llvm::cl::desc("Print performance metrics and statistics"));
static llvm::cl::opt<bool>
DisableFree("disable-free",
llvm::cl::desc("Disable freeing of memory on exit"),
llvm::cl::init(false));
static llvm::cl::opt<bool>
EmptyInputOnly("empty-input-only",
llvm::cl::desc("Force running on an empty input file"));
enum ProgActions {
RewriteObjC, // ObjC->C Rewriter.
RewriteBlocks, // ObjC->C Rewriter for Blocks.
RewriteMacros, // Expand macros but not #includes.
RewriteTest, // Rewriter playground
FixIt, // Fix-It Rewriter
HTMLTest, // HTML displayer testing stuff.
EmitAssembly, // Emit a .s file.
EmitLLVM, // Emit a .ll file.
EmitBC, // Emit a .bc file.
EmitLLVMOnly, // Generate LLVM IR, but do not
EmitHTML, // Translate input source into HTML.
ASTPrint, // Parse ASTs and print them.
ASTPrintXML, // Parse ASTs and print them in XML.
ASTDump, // Parse ASTs and dump them.
ASTView, // Parse ASTs and view them in Graphviz.
PrintDeclContext, // Print DeclContext and their Decls.
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, // Dump out preprocessed tokens.
DumpRawTokens, // Dump out raw tokens.
RunAnalysis, // Run one or more source code analyses.
GeneratePTH, // Generate pre-tokenized header.
GeneratePCH, // Generate pre-compiled header.
InheritanceView // View C++ inheritance for a specified class.
};
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(DumpRawTokens, "dump-raw-tokens",
"Lex file in raw mode and dump raw tokens"),
clEnumValN(RunAnalysis, "analyze",
"Run static analysis engine"),
clEnumValN(DumpTokens, "dump-tokens",
"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(EmitHTML, "emit-html",
"Output input source as HTML"),
clEnumValN(ASTPrint, "ast-print",
"Build ASTs and then pretty-print them"),
clEnumValN(ASTPrintXML, "ast-print-xml",
"Build ASTs and then print them in XML format"),
clEnumValN(ASTDump, "ast-dump",
"Build ASTs and then debug dump them"),
clEnumValN(ASTView, "ast-view",
"Build ASTs and view them with GraphViz"),
clEnumValN(PrintDeclContext, "print-decl-contexts",
"Print DeclContexts and their Decls"),
clEnumValN(GeneratePTH, "emit-pth",
"Generate pre-tokenized header file"),
clEnumValN(GeneratePCH, "emit-pch",
"Generate pre-compiled header file"),
clEnumValN(EmitAssembly, "S",
"Emit native assembly code"),
clEnumValN(EmitLLVM, "emit-llvm",
"Build ASTs then convert to LLVM, emit .ll file"),
clEnumValN(EmitBC, "emit-llvm-bc",
"Build ASTs then convert to LLVM, emit .bc file"),
clEnumValN(EmitLLVMOnly, "emit-llvm-only",
"Build ASTs and convert to LLVM, discarding output"),
clEnumValN(RewriteTest, "rewrite-test",
"Rewriter playground"),
clEnumValN(RewriteObjC, "rewrite-objc",
"Rewrite ObjC into C (code rewriter example)"),
clEnumValN(RewriteMacros, "rewrite-macros",
"Expand macros without full preprocessing"),
clEnumValN(RewriteBlocks, "rewrite-blocks",
"Rewrite Blocks to C"),
clEnumValN(FixIt, "fixit",
"Apply fix-it advice to the input source"),
clEnumValEnd));
static llvm::cl::opt<std::string>
OutputFile("o",
llvm::cl::value_desc("path"),
llvm::cl::desc("Specify output file"));
//===----------------------------------------------------------------------===//
// PTH.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
TokenCache("token-cache", llvm::cl::value_desc("path"),
llvm::cl::desc("Use specified token cache file"));
//===----------------------------------------------------------------------===//
// Diagnostic Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
VerifyDiagnostics("verify",
llvm::cl::desc("Verify emitted diagnostics and warnings"));
static llvm::cl::opt<std::string>
HTMLDiag("html-diags",
llvm::cl::desc("Generate HTML to report diagnostics"),
llvm::cl::value_desc("HTML directory"));
static llvm::cl::opt<bool>
NoShowColumn("fno-show-column",
llvm::cl::desc("Do not include column number on diagnostics"));
static llvm::cl::opt<bool>
NoShowLocation("fno-show-source-location",
llvm::cl::desc("Do not include source location information with"
" diagnostics"));
static llvm::cl::opt<bool>
NoCaretDiagnostics("fno-caret-diagnostics",
llvm::cl::desc("Do not include source line and caret with"
" diagnostics"));
static llvm::cl::opt<bool>
NoDiagnosticsFixIt("fno-diagnostics-fixit-info",
llvm::cl::desc("Do not include fixit information in"
" diagnostics"));
static llvm::cl::opt<bool>
PrintSourceRangeInfo("fdiagnostics-print-source-range-info",
llvm::cl::desc("Print source range spans in numeric form"));
static llvm::cl::opt<bool>
PrintDiagnosticOption("fdiagnostics-show-option",
llvm::cl::desc("Print diagnostic name with mappable diagnostics"));
static llvm::cl::opt<unsigned>
MessageLength("fmessage-length",
llvm::cl::desc("Format message diagnostics so that they fit "
"within N columns or fewer, when possible."),
llvm::cl::value_desc("N"));
static llvm::cl::opt<bool>
NoColorDiagnostic("fno-color-diagnostics",
llvm::cl::desc("Don't use colors when showing diagnostics "
"(automatically turned off if output is not a "
"terminal)."));
//===----------------------------------------------------------------------===//
// C++ Visualization.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
InheritanceViewCls("cxx-inheritance-view",
llvm::cl::value_desc("class name"),
llvm::cl::desc("View C++ inheritance for a specified class"));
//===----------------------------------------------------------------------===//
// Builtin Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
TimeReport("ftime-report",
llvm::cl::desc("Print the amount of time each "
"phase of compilation takes"));
static llvm::cl::opt<bool>
Freestanding("ffreestanding",
llvm::cl::desc("Assert that the compilation takes place in a "
"freestanding environment"));
static llvm::cl::opt<bool>
AllowBuiltins("fbuiltin", llvm::cl::init(true),
llvm::cl::desc("Disable implicit builtin knowledge of functions"));
static llvm::cl::opt<bool>
MathErrno("fmath-errno", llvm::cl::init(true),
llvm::cl::desc("Require math functions to respect errno"));
//===----------------------------------------------------------------------===//
// Language Options
//===----------------------------------------------------------------------===//
enum LangKind {
langkind_unspecified,
langkind_c,
langkind_c_cpp,
langkind_asm_cpp,
langkind_cxx,
langkind_cxx_cpp,
langkind_objc,
langkind_objc_cpp,
langkind_objcxx,
langkind_objcxx_cpp,
langkind_ocl
};
static llvm::cl::opt<LangKind>
BaseLang("x", llvm::cl::desc("Base language to compile"),
llvm::cl::init(langkind_unspecified),
llvm::cl::values(clEnumValN(langkind_c, "c", "C"),
clEnumValN(langkind_ocl, "cl", "OpenCL C"),
clEnumValN(langkind_cxx, "c++", "C++"),
clEnumValN(langkind_objc, "objective-c", "Objective C"),
clEnumValN(langkind_objcxx,"objective-c++","Objective C++"),
clEnumValN(langkind_c_cpp, "cpp-output",
"Preprocessed C"),
clEnumValN(langkind_asm_cpp, "assembler-with-cpp",
"Preprocessed asm"),
clEnumValN(langkind_cxx_cpp, "c++-cpp-output",
"Preprocessed C++"),
clEnumValN(langkind_objc_cpp, "objective-c-cpp-output",
"Preprocessed Objective C"),
clEnumValN(langkind_objcxx_cpp, "objective-c++-cpp-output",
"Preprocessed Objective C++"),
clEnumValN(langkind_c, "c-header",
"C header"),
clEnumValN(langkind_objc, "objective-c-header",
"Objective-C header"),
clEnumValN(langkind_cxx, "c++-header",
"C++ header"),
clEnumValN(langkind_objcxx, "objective-c++-header",
"Objective-C++ header"),
clEnumValEnd));
static llvm::cl::opt<bool>
LangObjC("ObjC", llvm::cl::desc("Set base language to Objective-C"),
llvm::cl::Hidden);
static llvm::cl::opt<bool>
LangObjCXX("ObjC++", llvm::cl::desc("Set base language to Objective-C++"),
llvm::cl::Hidden);
static llvm::cl::opt<bool>
ObjCExclusiveGC("fobjc-gc-only",
llvm::cl::desc("Use GC exclusively for Objective-C related "
"memory management"));
static llvm::cl::opt<bool>
ObjCEnableGC("fobjc-gc",
llvm::cl::desc("Enable Objective-C garbage collection"));
static llvm::cl::opt<bool>
ObjCEnableGCBitmapPrint("print-ivar-layout",
llvm::cl::desc("Enable Objective-C Ivar layout bitmap print trace"));
static llvm::cl::opt<LangOptions::VisibilityMode>
SymbolVisibility("fvisibility",
llvm::cl::desc("Set the default symbol visibility:"),
llvm::cl::init(LangOptions::Default),
llvm::cl::values(clEnumValN(LangOptions::Default, "default",
"Use default symbol visibility"),
clEnumValN(LangOptions::Hidden, "hidden",
"Use hidden symbol visibility"),
clEnumValN(LangOptions::Protected,"protected",
"Use protected symbol visibility"),
clEnumValEnd));
static llvm::cl::opt<bool>
OverflowChecking("ftrapv",
llvm::cl::desc("Trap on integer overflow"),
llvm::cl::init(false));
static llvm::cl::opt<bool>
AltiVec("faltivec", llvm::cl::desc("Enable AltiVec vector initializer syntax"),
llvm::cl::init(false));
static llvm::cl::opt<bool>
ObjCSenderDispatch("fobjc-sender-dependent-dispatch",
llvm::cl::desc("Enable sender-dependent dispatch for"
"Objective-C messages"), llvm::cl::init(false));
/// InitializeBaseLanguage - Handle the -x foo options.
static void InitializeBaseLanguage() {
if (LangObjC)
BaseLang = langkind_objc;
else if (LangObjCXX)
BaseLang = langkind_objcxx;
}
static LangKind GetLanguage(const std::string &Filename) {
if (BaseLang != langkind_unspecified)
return BaseLang;
std::string::size_type DotPos = Filename.rfind('.');
if (DotPos == std::string::npos) {
BaseLang = langkind_c; // Default to C if no extension.
return langkind_c;
}
std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
// C header: .h
// C++ header: .hh or .H;
// assembler no preprocessing: .s
// assembler: .S
if (Ext == "c")
return langkind_c;
else if (Ext == "S" ||
// If the compiler is run on a .s file, preprocess it as .S
Ext == "s")
return langkind_asm_cpp;
else if (Ext == "i")
return langkind_c_cpp;
else if (Ext == "ii")
return langkind_cxx_cpp;
else if (Ext == "m")
return langkind_objc;
else if (Ext == "mi")
return langkind_objc_cpp;
else if (Ext == "mm" || Ext == "M")
return langkind_objcxx;
else if (Ext == "mii")
return langkind_objcxx_cpp;
else if (Ext == "C" || Ext == "cc" || Ext == "cpp" || Ext == "CPP" ||
Ext == "c++" || Ext == "cp" || Ext == "cxx")
return langkind_cxx;
else if (Ext == "cl")
return langkind_ocl;
else
return langkind_c;
}
static void InitializeCOptions(LangOptions &Options) {
// Do nothing.
}
static void InitializeObjCOptions(LangOptions &Options) {
Options.ObjC1 = Options.ObjC2 = 1;
}
static void InitializeLangOptions(LangOptions &Options, LangKind LK){
// FIXME: implement -fpreprocessed mode.
bool NoPreprocess = false;
switch (LK) {
default: assert(0 && "Unknown language kind!");
case langkind_asm_cpp:
Options.AsmPreprocessor = 1;
// FALLTHROUGH
case langkind_c_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_c:
InitializeCOptions(Options);
break;
case langkind_cxx_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_cxx:
Options.CPlusPlus = 1;
break;
case langkind_objc_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_objc:
InitializeObjCOptions(Options);
break;
case langkind_objcxx_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_objcxx:
Options.ObjC1 = Options.ObjC2 = 1;
Options.CPlusPlus = 1;
break;
case langkind_ocl:
Options.OpenCL = 1;
Options.AltiVec = 1;
Options.CXXOperatorNames = 1;
Options.LaxVectorConversions = 1;
break;
}
if (ObjCExclusiveGC)
Options.setGCMode(LangOptions::GCOnly);
else if (ObjCEnableGC)
Options.setGCMode(LangOptions::HybridGC);
if (ObjCEnableGCBitmapPrint)
Options.ObjCGCBitmapPrint = 1;
if (AltiVec)
Options.AltiVec = 1;
Options.setVisibilityMode(SymbolVisibility);
Options.OverflowChecking = OverflowChecking;
}
/// LangStds - Language standards we support.
enum LangStds {
lang_unspecified,
lang_c89, lang_c94, lang_c99,
lang_gnu_START,
lang_gnu89 = lang_gnu_START, lang_gnu99,
lang_cxx98, lang_gnucxx98,
lang_cxx0x, lang_gnucxx0x
};
static llvm::cl::opt<LangStds>
LangStd("std", llvm::cl::desc("Language standard to compile for"),
llvm::cl::init(lang_unspecified),
llvm::cl::values(clEnumValN(lang_c89, "c89", "ISO C 1990"),
clEnumValN(lang_c89, "c90", "ISO C 1990"),
clEnumValN(lang_c89, "iso9899:1990", "ISO C 1990"),
clEnumValN(lang_c94, "iso9899:199409",
"ISO C 1990 with amendment 1"),
clEnumValN(lang_c99, "c99", "ISO C 1999"),
clEnumValN(lang_c99, "c9x", "ISO C 1999"),
clEnumValN(lang_c99, "iso9899:1999", "ISO C 1999"),
clEnumValN(lang_c99, "iso9899:199x", "ISO C 1999"),
clEnumValN(lang_gnu89, "gnu89",
"ISO C 1990 with GNU extensions"),
clEnumValN(lang_gnu99, "gnu99",
"ISO C 1999 with GNU extensions (default for C)"),
clEnumValN(lang_gnu99, "gnu9x",
"ISO C 1999 with GNU extensions"),
clEnumValN(lang_cxx98, "c++98",
"ISO C++ 1998 with amendments"),
clEnumValN(lang_gnucxx98, "gnu++98",
"ISO C++ 1998 with amendments and GNU "
"extensions (default for C++)"),
clEnumValN(lang_cxx0x, "c++0x",
"Upcoming ISO C++ 200x with amendments"),
clEnumValN(lang_gnucxx0x, "gnu++0x",
"Upcoming ISO C++ 200x with amendments and GNU "
"extensions"),
clEnumValEnd));
static llvm::cl::opt<bool>
NoOperatorNames("fno-operator-names",
llvm::cl::desc("Do not treat C++ operator name keywords as "
"synonyms for operators"));
static llvm::cl::opt<bool>
PascalStrings("fpascal-strings",
llvm::cl::desc("Recognize and construct Pascal-style "
"string literals"));
static llvm::cl::opt<bool>
MSExtensions("fms-extensions",
llvm::cl::desc("Accept some non-standard constructs used in "
"Microsoft header files "));
static llvm::cl::opt<bool>
WritableStrings("fwritable-strings",
llvm::cl::desc("Store string literals as writable data"));
static llvm::cl::opt<bool>
NoLaxVectorConversions("fno-lax-vector-conversions",
llvm::cl::desc("Disallow implicit conversions between "
"vectors with a different number of "
"elements or different element types"));
static llvm::cl::opt<bool>
EnableBlocks("fblocks", llvm::cl::desc("enable the 'blocks' language feature"));
static llvm::cl::opt<bool>
EnableHeinousExtensions("fheinous-gnu-extensions",
llvm::cl::desc("enable GNU extensions that you really really shouldn't use"),
llvm::cl::ValueDisallowed, llvm::cl::Hidden);
static llvm::cl::opt<bool>
ObjCNonFragileABI("fobjc-nonfragile-abi",
llvm::cl::desc("enable objective-c's nonfragile abi"));
static llvm::cl::opt<bool>
EmitAllDecls("femit-all-decls",
llvm::cl::desc("Emit all declarations, even if unused"));
static llvm::cl::opt<bool>
Exceptions("fexceptions",
llvm::cl::desc("Enable support for exception handling"));
static llvm::cl::opt<bool>
Rtti("frtti", llvm::cl::init(true),
llvm::cl::desc("Enable generation of rtti information"));
static llvm::cl::opt<bool>
GNURuntime("fgnu-runtime",
llvm::cl::desc("Generate output compatible with the standard GNU "
"Objective-C runtime"));
static llvm::cl::opt<bool>
NeXTRuntime("fnext-runtime",
llvm::cl::desc("Generate output compatible with the NeXT "
"runtime"));
static llvm::cl::opt<bool>
CharIsSigned("fsigned-char",
llvm::cl::desc("Force char to be a signed/unsigned type"));
static llvm::cl::opt<bool>
Trigraphs("trigraphs", llvm::cl::desc("Process trigraph sequences"));
static llvm::cl::opt<unsigned>
TemplateDepth("ftemplate-depth", llvm::cl::init(99),
llvm::cl::desc("Maximum depth of recursive template "
"instantiation"));
static llvm::cl::opt<bool>
DollarsInIdents("fdollars-in-identifiers",
llvm::cl::desc("Allow '$' in identifiers"));
static llvm::cl::opt<bool>
OptSize("Os", llvm::cl::desc("Optimize for size"));
static llvm::cl::opt<bool>
DisableLLVMOptimizations("disable-llvm-optzns",
llvm::cl::desc("Don't run LLVM optimization passes"));
static llvm::cl::opt<bool>
NoCommon("fno-common",
llvm::cl::desc("Compile common globals like normal definitions"),
llvm::cl::ValueDisallowed);
static llvm::cl::opt<std::string>
MainFileName("main-file-name",
llvm::cl::desc("Main file name to use for debug info"));
// FIXME: Also add an "-fno-access-control" option.
static llvm::cl::opt<bool>
AccessControl("faccess-control",
llvm::cl::desc("Enable C++ access control"));
// It might be nice to add bounds to the CommandLine library directly.
struct OptLevelParser : public llvm::cl::parser<unsigned> {
bool parse(llvm::cl::Option &O, const char *ArgName,
const std::string &Arg, unsigned &Val) {
if (llvm::cl::parser<unsigned>::parse(O, ArgName, Arg, Val))
return true;
if (Val > 3)
return O.error("'" + Arg + "' invalid optimization level!");
return false;
}
};
static llvm::cl::opt<unsigned, false, OptLevelParser>
OptLevel("O", llvm::cl::Prefix,
llvm::cl::desc("Optimization level"),
llvm::cl::init(0));
static llvm::cl::opt<unsigned>
PICLevel("pic-level", llvm::cl::desc("Value for __PIC__"));
static llvm::cl::opt<bool>
StaticDefine("static-define", llvm::cl::desc("Should __STATIC__ be defined"));
static llvm::cl::opt<int>
StackProtector("stack-protector",
llvm::cl::desc("Enable stack protectors"),
llvm::cl::init(-1));
static void InitializeLanguageStandard(LangOptions &Options, LangKind LK,
TargetInfo *Target,
const llvm::StringMap<bool> &Features) {
// Allow the target to set the default the langauge options as it sees fit.
Target->getDefaultLangOptions(Options);
// Pass the map of target features to the target for validation and
// processing.
Target->HandleTargetFeatures(Features);
if (LangStd == lang_unspecified) {
// Based on the base language, pick one.
switch (LK) {
case lang_unspecified: assert(0 && "Unknown base language");
case langkind_ocl:
LangStd = lang_c99;
break;
case langkind_c:
case langkind_asm_cpp:
case langkind_c_cpp:
case langkind_objc:
case langkind_objc_cpp:
LangStd = lang_gnu99;
break;
case langkind_cxx:
case langkind_cxx_cpp:
case langkind_objcxx:
case langkind_objcxx_cpp:
LangStd = lang_gnucxx98;
break;
}
}
switch (LangStd) {
default: assert(0 && "Unknown language standard!");
// Fall through from newer standards to older ones. This isn't really right.
// FIXME: Enable specifically the right features based on the language stds.
case lang_gnucxx0x:
case lang_cxx0x:
Options.CPlusPlus0x = 1;
// FALL THROUGH
case lang_gnucxx98:
case lang_cxx98:
Options.CPlusPlus = 1;
Options.CXXOperatorNames = !NoOperatorNames;
// FALL THROUGH.
case lang_gnu99:
case lang_c99:
Options.C99 = 1;
Options.HexFloats = 1;
// FALL THROUGH.
case lang_gnu89:
Options.BCPLComment = 1; // Only for C99/C++.
// FALL THROUGH.
case lang_c94:
Options.Digraphs = 1; // C94, C99, C++.
// FALL THROUGH.
case lang_c89:
break;
}
// GNUMode - Set if we're in gnu99, gnu89, gnucxx98, etc.
Options.GNUMode = LangStd >= lang_gnu_START;
if (Options.CPlusPlus) {
Options.C99 = 0;
Options.HexFloats = Options.GNUMode;
}
if (LangStd == lang_c89 || LangStd == lang_c94 || LangStd == lang_gnu89)
Options.ImplicitInt = 1;
else
Options.ImplicitInt = 0;
// Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
// is specified, or -std is set to a conforming mode.
Options.Trigraphs = !Options.GNUMode;
if (Trigraphs.getPosition())
Options.Trigraphs = Trigraphs; // Command line option wins if specified.
// If in a conformant language mode (e.g. -std=c99) Blocks defaults to off
// even if they are normally on for the target. In GNU modes (e.g.
// -std=gnu99) the default for blocks depends on the target settings.
// However, blocks are not turned off when compiling Obj-C or Obj-C++ code.
if (!Options.ObjC1 && !Options.GNUMode)
Options.Blocks = 0;
// Default to not accepting '$' in identifiers when preprocessing assembler,
// but do accept when preprocessing C. FIXME: these defaults are right for
// darwin, are they right everywhere?
Options.DollarIdents = LK != langkind_asm_cpp;
if (DollarsInIdents.getPosition()) // Explicit setting overrides default.
Options.DollarIdents = DollarsInIdents;
if (PascalStrings.getPosition())
Options.PascalStrings = PascalStrings;
if (MSExtensions.getPosition())
Options.Microsoft = MSExtensions;
Options.WritableStrings = WritableStrings;
if (NoLaxVectorConversions.getPosition())
Options.LaxVectorConversions = 0;
Options.Exceptions = Exceptions;
Options.Rtti = Rtti;
if (EnableBlocks.getPosition())
Options.Blocks = EnableBlocks;
if (CharIsSigned.getPosition())
Options.CharIsSigned = CharIsSigned;
if (!AllowBuiltins)
Options.NoBuiltin = 1;
if (Freestanding)
Options.Freestanding = Options.NoBuiltin = 1;
if (EnableHeinousExtensions)
Options.HeinousExtensions = 1;
if (AccessControl)
Options.AccessControl = 1;
// OpenCL and C++ both have bool, true, false keywords.
Options.Bool = Options.OpenCL | Options.CPlusPlus;
Options.MathErrno = MathErrno;
Options.InstantiationDepth = TemplateDepth;
// Override the default runtime if the user requested it.
if (NeXTRuntime)
Options.NeXTRuntime = 1;
else if (GNURuntime)
Options.NeXTRuntime = 0;
if (ObjCNonFragileABI)
Options.ObjCNonFragileABI = 1;
Options.ObjCSenderDispatch = ObjCSenderDispatch;
if (EmitAllDecls)
Options.EmitAllDecls = 1;
// The __OPTIMIZE_SIZE__ define is tied to -Oz, which we don't
// support.
Options.OptimizeSize = 0;
// -Os implies -O2
if (OptSize || OptLevel)
Options.Optimize = 1;
assert(PICLevel <= 2 && "Invalid value for -pic-level");
Options.PICLevel = PICLevel;
Options.GNUInline = !Options.C99;
// FIXME: This is affected by other options (-fno-inline).
Options.NoInline = !OptSize && !OptLevel;
Options.Static = StaticDefine;
switch (StackProtector) {
default:
assert(StackProtector <= 2 && "Invalid value for -stack-protector");
case -1: break;
case 0: Options.setStackProtectorMode(LangOptions::SSPOff); break;
case 1: Options.setStackProtectorMode(LangOptions::SSPOn); break;
case 2: Options.setStackProtectorMode(LangOptions::SSPReq); break;
}
if (MainFileName.getPosition())
Options.setMainFileName(MainFileName.c_str());
}
//===----------------------------------------------------------------------===//
// Target Triple Processing.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
TargetTriple("triple",
llvm::cl::desc("Specify target triple (e.g. i686-apple-darwin9)"));
static llvm::cl::opt<std::string>
MacOSVersionMin("mmacosx-version-min",
llvm::cl::desc("Specify target Mac OS X version (e.g. 10.5)"));
// If -mmacosx-version-min=10.3.9 is specified, change the triple from being
// something like powerpc-apple-darwin9 to powerpc-apple-darwin7
// FIXME: We should have the driver do this instead.
static void HandleMacOSVersionMin(std::string &Triple) {
std::string::size_type DarwinDashIdx = Triple.find("-darwin");
if (DarwinDashIdx == std::string::npos) {
fprintf(stderr,
"-mmacosx-version-min only valid for darwin (Mac OS X) targets\n");
exit(1);
}
unsigned DarwinNumIdx = DarwinDashIdx + strlen("-darwin");
// Remove the number.
Triple.resize(DarwinNumIdx);
// Validate that MacOSVersionMin is a 'version number', starting with 10.[3-9]
bool MacOSVersionMinIsInvalid = false;
int VersionNum = 0;
if (MacOSVersionMin.size() < 4 ||
MacOSVersionMin.substr(0, 3) != "10." ||
!isdigit(MacOSVersionMin[3])) {
MacOSVersionMinIsInvalid = true;
} else {
const char *Start = MacOSVersionMin.c_str()+3;
char *End = 0;
VersionNum = (int)strtol(Start, &End, 10);
// The version number must be in the range 0-9.
MacOSVersionMinIsInvalid = (unsigned)VersionNum > 9;
// Turn MacOSVersionMin into a darwin number: e.g. 10.3.9 is 3 -> 7.
Triple += llvm::itostr(VersionNum+4);
if (End[0] == '.' && isdigit(End[1]) && End[2] == '\0') { // 10.4.7 is ok.
// Add the period piece (.7) to the end of the triple. This gives us
// something like ...-darwin8.7
Triple += End;
} else if (End[0] != '\0') { // "10.4" is ok. 10.4x is not.
MacOSVersionMinIsInvalid = true;
}
}
if (MacOSVersionMinIsInvalid) {
fprintf(stderr,
"-mmacosx-version-min=%s is invalid, expected something like '10.4'.\n",
MacOSVersionMin.c_str());
exit(1);
}
else if (VersionNum <= 4 &&
!strncmp(Triple.c_str(), "x86_64", strlen("x86_64"))) {
fprintf(stderr,
"-mmacosx-version-min=%s is invalid with -arch x86_64.\n",
MacOSVersionMin.c_str());
exit(1);
}
}
static llvm::cl::opt<std::string>
IPhoneOSVersionMin("miphoneos-version-min",
llvm::cl::desc("Specify target iPhone OS version (e.g. 2.0)"));
// If -miphoneos-version-min=2.2 is specified, change the triple from being
// something like armv6-apple-darwin10 to armv6-apple-darwin9.2.2. We use
// 9 as the default major Darwin number, and encode the iPhone OS version
// number in the minor version and revision.
// FIXME: We should have the driver do this instead.
static void HandleIPhoneOSVersionMin(std::string &Triple) {
std::string::size_type DarwinDashIdx = Triple.find("-darwin");
if (DarwinDashIdx == std::string::npos) {
fprintf(stderr,
"-miphoneos-version-min only valid for darwin (Mac OS X) targets\n");
exit(1);
}
unsigned DarwinNumIdx = DarwinDashIdx + strlen("-darwin");
// Remove the number.
Triple.resize(DarwinNumIdx);
// Validate that IPhoneOSVersionMin is a 'version number', starting with [2-9].[0-9]
bool IPhoneOSVersionMinIsInvalid = false;
int VersionNum = 0;
if (IPhoneOSVersionMin.size() < 3 ||
!isdigit(IPhoneOSVersionMin[0])) {
IPhoneOSVersionMinIsInvalid = true;
} else {
const char *Start = IPhoneOSVersionMin.c_str();
char *End = 0;
VersionNum = (int)strtol(Start, &End, 10);
// The version number must be in the range 0-9.
IPhoneOSVersionMinIsInvalid = (unsigned)VersionNum > 9;
// Turn IPhoneOSVersionMin into a darwin number: e.g. 2.0 is 2 -> 9.2.
Triple += "9." + llvm::itostr(VersionNum);
if (End[0] == '.' && isdigit(End[1]) && End[2] == '\0') { // 2.2 is ok.
// Add the period piece (.2) to the end of the triple. This gives us
// something like ...-darwin9.2.2
Triple += End;
} else if (End[0] != '\0') { // "2.2" is ok. 2x is not.
IPhoneOSVersionMinIsInvalid = true;
}
}
if (IPhoneOSVersionMinIsInvalid) {
fprintf(stderr,
"-miphoneos-version-min=%s is invalid, expected something like '2.0'.\n",
IPhoneOSVersionMin.c_str());
exit(1);
}
}
/// CreateTargetTriple - Process the various options that affect the target
/// triple and build a final aggregate triple that we are compiling for.
static std::string CreateTargetTriple() {
// Initialize base triple. If a -triple option has been specified, use
// that triple. Otherwise, default to the host triple.
std::string Triple = TargetTriple;
if (Triple.empty())
Triple = llvm::sys::getHostTriple();
// If -mmacosx-version-min=10.3.9 is specified, change the triple from being
// something like powerpc-apple-darwin9 to powerpc-apple-darwin7
if (!MacOSVersionMin.empty())
HandleMacOSVersionMin(Triple);
else if (!IPhoneOSVersionMin.empty())
HandleIPhoneOSVersionMin(Triple);;
return Triple;
}
//===----------------------------------------------------------------------===//
// SourceManager initialization.
//===----------------------------------------------------------------------===//
static bool InitializeSourceManager(Preprocessor &PP,
const std::string &InFile) {
// Figure out where to get and map in the main file.
SourceManager &SourceMgr = PP.getSourceManager();
FileManager &FileMgr = PP.getFileManager();
if (EmptyInputOnly) {
const char *EmptyStr = "";
llvm::MemoryBuffer *SB =
llvm::MemoryBuffer::getMemBuffer(EmptyStr, EmptyStr, "<empty input>");
SourceMgr.createMainFileIDForMemBuffer(SB);
} else if (InFile != "-") {
const FileEntry *File = FileMgr.getFile(InFile);
if (File) SourceMgr.createMainFileID(File, SourceLocation());
if (SourceMgr.getMainFileID().isInvalid()) {
PP.getDiagnostics().Report(FullSourceLoc(), diag::err_fe_error_reading)
<< InFile.c_str();
return true;
}
} else {
llvm::MemoryBuffer *SB = llvm::MemoryBuffer::getSTDIN();
// If stdin was empty, SB is null. Cons up an empty memory
// buffer now.
if (!SB) {
const char *EmptyStr = "";
SB = llvm::MemoryBuffer::getMemBuffer(EmptyStr, EmptyStr, "<stdin>");
}
SourceMgr.createMainFileIDForMemBuffer(SB);
if (SourceMgr.getMainFileID().isInvalid()) {
PP.getDiagnostics().Report(FullSourceLoc(),
diag::err_fe_error_reading_stdin);
return true;
}
}
return false;
}
//===----------------------------------------------------------------------===//
// Preprocessor Initialization
//===----------------------------------------------------------------------===//
// FIXME: Preprocessor builtins to support.
// -A... - Play with #assertions
// -undef - Undefine all predefined macros
static llvm::cl::list<std::string>
D_macros("D", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Predefine the specified macro"));
static llvm::cl::list<std::string>
U_macros("U", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Undefine the specified macro"));
static llvm::cl::list<std::string>
ImplicitIncludes("include", llvm::cl::value_desc("file"),
llvm::cl::desc("Include file before parsing"));
static llvm::cl::list<std::string>
ImplicitMacroIncludes("imacros", llvm::cl::value_desc("file"),
llvm::cl::desc("Include macros from file before parsing"));
static llvm::cl::opt<std::string>
ImplicitIncludePCH("include-pch", llvm::cl::value_desc("file"),
llvm::cl::desc("Include precompiled header file"));
static llvm::cl::opt<std::string>
ImplicitIncludePTH("include-pth", llvm::cl::value_desc("file"),
llvm::cl::desc("Include file before parsing"));
static llvm::cl::opt<bool>
RelocatablePCH("relocatable-pch",
llvm::cl::desc("Whether to build a relocatable precompiled "
"header"));
//===----------------------------------------------------------------------===//
// Preprocessor include path information.
//===----------------------------------------------------------------------===//
// This tool exports a large number of command line options to control how the
// preprocessor searches for header files. At root, however, the Preprocessor
// object takes a very simple interface: a list of directories to search for
//
// FIXME: -nostdinc++
// FIXME: -imultilib
//
static llvm::cl::opt<bool>
nostdinc("nostdinc", llvm::cl::desc("Disable standard #include directories"));
// Various command line options. These four add directories to each chain.
static llvm::cl::list<std::string>
F_dirs("F", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to framework include search path"));
static llvm::cl::list<std::string>
I_dirs("I", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to include search path"));
static llvm::cl::list<std::string>
idirafter_dirs("idirafter", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to AFTER include search path"));
static llvm::cl::list<std::string>
iquote_dirs("iquote", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to QUOTE include search path"));
static llvm::cl::list<std::string>
isystem_dirs("isystem", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to SYSTEM include search path"));
// These handle -iprefix/-iwithprefix/-iwithprefixbefore.
static llvm::cl::list<std::string>
iprefix_vals("iprefix", llvm::cl::value_desc("prefix"), llvm::cl::Prefix,
llvm::cl::desc("Set the -iwithprefix/-iwithprefixbefore prefix"));
static llvm::cl::list<std::string>
iwithprefix_vals("iwithprefix", llvm::cl::value_desc("dir"), llvm::cl::Prefix,
llvm::cl::desc("Set directory to SYSTEM include search path with prefix"));
static llvm::cl::list<std::string>
iwithprefixbefore_vals("iwithprefixbefore", llvm::cl::value_desc("dir"),
llvm::cl::Prefix,
llvm::cl::desc("Set directory to include search path with prefix"));
static llvm::cl::opt<std::string>
isysroot("isysroot", llvm::cl::value_desc("dir"), llvm::cl::init("/"),
llvm::cl::desc("Set the system root directory (usually /)"));
// Finally, implement the code that groks the options above.
/// InitializeIncludePaths - Process the -I options and set them in the
/// HeaderSearch object.
void InitializeIncludePaths(const char *Argv0, HeaderSearch &Headers,
FileManager &FM, const LangOptions &Lang) {
InitHeaderSearch Init(Headers, Verbose, isysroot);
// Handle -I... and -F... options, walking the lists in parallel.
unsigned Iidx = 0, Fidx = 0;
while (Iidx < I_dirs.size() && Fidx < F_dirs.size()) {
if (I_dirs.getPosition(Iidx) < F_dirs.getPosition(Fidx)) {
Init.AddPath(I_dirs[Iidx], InitHeaderSearch::Angled, false, true, false);
++Iidx;
} else {
Init.AddPath(F_dirs[Fidx], InitHeaderSearch::Angled, false, true, true);
++Fidx;
}
}
// Consume what's left from whatever list was longer.
for (; Iidx != I_dirs.size(); ++Iidx)
Init.AddPath(I_dirs[Iidx], InitHeaderSearch::Angled, false, true, false);
for (; Fidx != F_dirs.size(); ++Fidx)
Init.AddPath(F_dirs[Fidx], InitHeaderSearch::Angled, false, true, true);
// Handle -idirafter... options.
for (unsigned i = 0, e = idirafter_dirs.size(); i != e; ++i)
Init.AddPath(idirafter_dirs[i], InitHeaderSearch::After,
false, true, false);
// Handle -iquote... options.
for (unsigned i = 0, e = iquote_dirs.size(); i != e; ++i)
Init.AddPath(iquote_dirs[i], InitHeaderSearch::Quoted, false, true, false);
// Handle -isystem... options.
for (unsigned i = 0, e = isystem_dirs.size(); i != e; ++i)
Init.AddPath(isystem_dirs[i], InitHeaderSearch::System, false, true, false);
// Walk the -iprefix/-iwithprefix/-iwithprefixbefore argument lists in
// parallel, processing the values in order of occurance to get the right
// prefixes.
{
std::string Prefix = ""; // FIXME: this isn't the correct default prefix.
unsigned iprefix_idx = 0;
unsigned iwithprefix_idx = 0;
unsigned iwithprefixbefore_idx = 0;
bool iprefix_done = iprefix_vals.empty();
bool iwithprefix_done = iwithprefix_vals.empty();
bool iwithprefixbefore_done = iwithprefixbefore_vals.empty();
while (!iprefix_done || !iwithprefix_done || !iwithprefixbefore_done) {
if (!iprefix_done &&
(iwithprefix_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefix_vals.getPosition(iwithprefix_idx)) &&
(iwithprefixbefore_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
Prefix = iprefix_vals[iprefix_idx];
++iprefix_idx;
iprefix_done = iprefix_idx == iprefix_vals.size();
} else if (!iwithprefix_done &&
(iwithprefixbefore_done ||
iwithprefix_vals.getPosition(iwithprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
Init.AddPath(Prefix+iwithprefix_vals[iwithprefix_idx],
InitHeaderSearch::System, false, false, false);
++iwithprefix_idx;
iwithprefix_done = iwithprefix_idx == iwithprefix_vals.size();
} else {
Init.AddPath(Prefix+iwithprefixbefore_vals[iwithprefixbefore_idx],
InitHeaderSearch::Angled, false, false, false);
++iwithprefixbefore_idx;
iwithprefixbefore_done =
iwithprefixbefore_idx == iwithprefixbefore_vals.size();
}
}
}
Init.AddDefaultEnvVarPaths(Lang);
// Add the clang headers, which are relative to the clang binary.
llvm::sys::Path MainExecutablePath =
llvm::sys::Path::GetMainExecutable(Argv0,
(void*)(intptr_t)InitializeIncludePaths);
if (!MainExecutablePath.isEmpty()) {
MainExecutablePath.eraseComponent(); // Remove /clang from foo/bin/clang
MainExecutablePath.eraseComponent(); // Remove /bin from foo/bin
// Get foo/lib/clang/<version>/include
MainExecutablePath.appendComponent("lib");
MainExecutablePath.appendComponent("clang");
MainExecutablePath.appendComponent(CLANG_VERSION_STRING);
MainExecutablePath.appendComponent("include");
// We pass true to ignore sysroot so that we *always* look for clang headers
// relative to our executable, never relative to -isysroot.
Init.AddPath(MainExecutablePath.c_str(), InitHeaderSearch::System,
false, false, false, true /*ignore sysroot*/);
}
if (!nostdinc)
Init.AddDefaultSystemIncludePaths(Lang);
// Now that we have collected all of the include paths, merge them all
// together and tell the preprocessor about them.
Init.Realize();
}
void InitializePreprocessorInitOptions(PreprocessorInitOptions &InitOpts)
{
// Add macros from the command line.
unsigned d = 0, D = D_macros.size();
unsigned u = 0, U = U_macros.size();
while (d < D || u < U) {
if (u == U || (d < D && D_macros.getPosition(d) < U_macros.getPosition(u)))
InitOpts.addMacroDef(D_macros[d++]);
else
InitOpts.addMacroUndef(U_macros[u++]);
}
// If -imacros are specified, include them now. These are processed before
// any -include directives.
for (unsigned i = 0, e = ImplicitMacroIncludes.size(); i != e; ++i)
InitOpts.addMacroInclude(ImplicitMacroIncludes[i]);
if (!ImplicitIncludePTH.empty() || !ImplicitIncludes.empty() ||
(!ImplicitIncludePCH.empty() && ProgAction == PrintPreprocessedInput)) {
// We want to add these paths to the predefines buffer in order, make a
// temporary vector to sort by their occurrence.
llvm::SmallVector<std::pair<unsigned, std::string*>, 8> OrderedPaths;
if (!ImplicitIncludePTH.empty())
OrderedPaths.push_back(std::make_pair(ImplicitIncludePTH.getPosition(),
&ImplicitIncludePTH));
if (!ImplicitIncludePCH.empty() && ProgAction == PrintPreprocessedInput)
OrderedPaths.push_back(std::make_pair(ImplicitIncludePCH.getPosition(),
&ImplicitIncludePCH));
for (unsigned i = 0, e = ImplicitIncludes.size(); i != e; ++i)
OrderedPaths.push_back(std::make_pair(ImplicitIncludes.getPosition(i),
&ImplicitIncludes[i]));
llvm::array_pod_sort(OrderedPaths.begin(), OrderedPaths.end());
// Now that they are ordered by position, add to the predefines buffer.
for (unsigned i = 0, e = OrderedPaths.size(); i != e; ++i) {
std::string *Ptr = OrderedPaths[i].second;
if (!ImplicitIncludes.empty() &&
Ptr >= &ImplicitIncludes[0] &&
Ptr <= &ImplicitIncludes[ImplicitIncludes.size()-1]) {
InitOpts.addInclude(*Ptr, false);
} else if (Ptr == &ImplicitIncludePTH) {
InitOpts.addInclude(*Ptr, true);
} else {
// We end up here when we're producing preprocessed output and
// we loaded a PCH file. In this case, just include the header
// file that was used to build the precompiled header.
assert(Ptr == &ImplicitIncludePCH);
std::string OriginalFile = PCHReader::getOriginalSourceFile(*Ptr);
if (!OriginalFile.empty()) {
InitOpts.addInclude(OriginalFile, false);
ImplicitIncludePCH.clear();
}
}
}
}
}
//===----------------------------------------------------------------------===//
// Driver PreprocessorFactory - For lazily generating preprocessors ...
//===----------------------------------------------------------------------===//
namespace {
class VISIBILITY_HIDDEN DriverPreprocessorFactory : public PreprocessorFactory {
Diagnostic &Diags;
const LangOptions &LangInfo;
TargetInfo &Target;
SourceManager &SourceMgr;
HeaderSearch &HeaderInfo;
public:
DriverPreprocessorFactory(Diagnostic &diags, const LangOptions &opts,
TargetInfo &target, SourceManager &SM,
HeaderSearch &Headers)
: Diags(diags), LangInfo(opts), Target(target),
SourceMgr(SM), HeaderInfo(Headers) {}
virtual ~DriverPreprocessorFactory() {}
virtual Preprocessor* CreatePreprocessor() {
llvm::OwningPtr<PTHManager> PTHMgr;
if (!TokenCache.empty() && !ImplicitIncludePTH.empty()) {
fprintf(stderr, "error: cannot use both -token-cache and -include-pth "
"options\n");
exit(1);
}
// Use PTH?
if (!TokenCache.empty() || !ImplicitIncludePTH.empty()) {
const std::string& x = TokenCache.empty() ? ImplicitIncludePTH:TokenCache;
PTHMgr.reset(PTHManager::Create(x, &Diags,
TokenCache.empty() ? Diagnostic::Error
: Diagnostic::Warning));
}
if (Diags.hasErrorOccurred())
exit(1);
// Create the Preprocessor.
llvm::OwningPtr<Preprocessor> PP(new Preprocessor(Diags, LangInfo, Target,
SourceMgr, HeaderInfo,
PTHMgr.get()));
// Note that this is different then passing PTHMgr to Preprocessor's ctor.
// That argument is used as the IdentifierInfoLookup argument to
// IdentifierTable's ctor.
if (PTHMgr) {
PTHMgr->setPreprocessor(PP.get());
PP->setPTHManager(PTHMgr.take());
}
PreprocessorInitOptions InitOpts;
InitializePreprocessorInitOptions(InitOpts);
if (InitializePreprocessor(*PP, InitOpts))
return 0;
return PP.take();
}
};
}
//===----------------------------------------------------------------------===//
// Basic Parser driver
//===----------------------------------------------------------------------===//
static void ParseFile(Preprocessor &PP, MinimalAction *PA) {
Parser P(PP, *PA);
PP.EnterMainSourceFile();
// Parsing the specified input file.
P.ParseTranslationUnit();
delete PA;
}
//===----------------------------------------------------------------------===//
// Code generation options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
GenerateDebugInfo("g",
llvm::cl::desc("Generate source level debug information"));
static llvm::cl::opt<std::string>
TargetCPU("mcpu",
llvm::cl::desc("Target a specific cpu type (-mcpu=help for details)"));
static llvm::cl::list<std::string>
TargetFeatures("target-feature", llvm::cl::desc("Target specific attributes"));
static llvm::cl::opt<bool>
DisableRedZone("disable-red-zone",
llvm::cl::desc("Do not emit code that uses the red zone."),
llvm::cl::init(false));
static llvm::cl::opt<bool>
NoImplicitFloat("no-implicit-float",
llvm::cl::desc("Don't generate implicit floating point instructions (x86-only)"),
llvm::cl::init(false));
/// ComputeTargetFeatures - Recompute the target feature list to only
/// be the list of things that are enabled, based on the target cpu
/// and feature list.
static void ComputeFeatureMap(TargetInfo *Target,
llvm::StringMap<bool> &Features) {
assert(Features.empty() && "invalid map");
// Initialize the feature map based on the target.
Target->getDefaultFeatures(TargetCPU, Features);
// Apply the user specified deltas.
for (llvm::cl::list<std::string>::iterator it = TargetFeatures.begin(),
ie = TargetFeatures.end(); it != ie; ++it) {
const char *Name = it->c_str();
// FIXME: Don't handle errors like this.
if (Name[0] != '-' && Name[0] != '+') {
fprintf(stderr, "error: clang-cc: invalid target feature string: %s\n",
Name);
exit(1);
}
if (!Target->setFeatureEnabled(Features, Name + 1, (Name[0] == '+'))) {
fprintf(stderr, "error: clang-cc: invalid target feature name: %s\n",
Name + 1);
exit(1);
}
}
}
static void InitializeCompileOptions(CompileOptions &Opts,
const LangOptions &LangOpts,
const llvm::StringMap<bool> &Features) {
Opts.OptimizeSize = OptSize;
Opts.DebugInfo = GenerateDebugInfo;
if (DisableLLVMOptimizations) {
Opts.OptimizationLevel = 0;
Opts.Inlining = CompileOptions::NoInlining;
} else {
if (OptSize) {
// -Os implies -O2
Opts.OptimizationLevel = 2;
} else {
Opts.OptimizationLevel = OptLevel;
}
// We must always run at least the always inlining pass.
if (Opts.OptimizationLevel > 1)
Opts.Inlining = CompileOptions::NormalInlining;
else
Opts.Inlining = CompileOptions::OnlyAlwaysInlining;
}
// FIXME: There are llvm-gcc options to control these selectively.
Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !OptSize);
Opts.SimplifyLibCalls = !LangOpts.NoBuiltin;
#ifdef NDEBUG
Opts.VerifyModule = 0;
#endif
Opts.CPU = TargetCPU;
Opts.Features.clear();
for (llvm::StringMap<bool>::const_iterator it = Features.begin(),
ie = Features.end(); it != ie; ++it) {
// FIXME: If we are completely confident that we have the right
// set, we only need to pass the minuses.
std::string Name(it->second ? "+" : "-");
Name += it->first();
Opts.Features.push_back(Name);
}
Opts.NoCommon = NoCommon | LangOpts.CPlusPlus;
// Handle -ftime-report.
Opts.TimePasses = TimeReport;
Opts.DisableRedZone = DisableRedZone;
Opts.NoImplicitFloat = NoImplicitFloat;
}
//===----------------------------------------------------------------------===//
// Fix-It Options
//===----------------------------------------------------------------------===//
static llvm::cl::list<ParsedSourceLocation>
FixItAtLocations("fixit-at", llvm::cl::value_desc("source-location"),
llvm::cl::desc("Perform Fix-It modifications at the given source location"));
//===----------------------------------------------------------------------===//
// ObjC Rewriter Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
SilenceRewriteMacroWarning("Wno-rewrite-macros", llvm::cl::init(false),
llvm::cl::desc("Silence ObjC rewriting warnings"));
//===----------------------------------------------------------------------===//
// Warning Options
//===----------------------------------------------------------------------===//
// This gets all -W options, including -Werror, -W[no-]system-headers, etc. The
// driver has stripped off -Wa,foo etc. The driver has also translated -W to
// -Wextra, so we don't need to worry about it.
static llvm::cl::list<std::string>
OptWarnings("W", llvm::cl::Prefix, llvm::cl::ValueOptional);
static llvm::cl::opt<bool> OptPedantic("pedantic");
static llvm::cl::opt<bool> OptPedanticErrors("pedantic-errors");
static llvm::cl::opt<bool> OptNoWarnings("w");
//===----------------------------------------------------------------------===//
// Preprocessing (-E mode) Options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
DisableLineMarkers("P", llvm::cl::desc("Disable linemarker output in -E mode"));
static llvm::cl::opt<bool>
EnableCommentOutput("C", llvm::cl::desc("Enable comment output in -E mode"));
static llvm::cl::opt<bool>
EnableMacroCommentOutput("CC",
llvm::cl::desc("Enable comment output in -E mode, "
"even from macro expansions"));
static llvm::cl::opt<bool>
DumpMacros("dM", llvm::cl::desc("Print macro definitions in -E mode instead of"
" normal output"));
static llvm::cl::opt<bool>
DumpDefines("dD", llvm::cl::desc("Print macro definitions in -E mode in "
"addition to normal output"));
//===----------------------------------------------------------------------===//
// Dependency file options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
DependencyFile("dependency-file",
llvm::cl::desc("Filename (or -) to write dependency output to"));
static llvm::cl::opt<bool>
DependenciesIncludeSystemHeaders("sys-header-deps",
llvm::cl::desc("Include system headers in dependency output"));
static llvm::cl::list<std::string>
DependencyTargets("MT",
llvm::cl::desc("Specify target for dependency"));
// FIXME: Implement feature
static llvm::cl::opt<bool>
PhonyDependencyTarget("MP",
llvm::cl::desc("Create phony target for each dependency "
"(other than main file)"));
//===----------------------------------------------------------------------===//
// Analysis options
//===----------------------------------------------------------------------===//
static llvm::cl::list<Analyses>
AnalysisList(llvm::cl::desc("Source Code Analysis - Checks and Analyses"),
llvm::cl::values(
#define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
clEnumValN(NAME, CMDFLAG, DESC),
#include "clang/Frontend/Analyses.def"
clEnumValEnd));
static llvm::cl::opt<AnalysisStores>
AnalysisStoreOpt("analyzer-store",
llvm::cl::desc("Source Code Analysis - Abstract Memory Store Models"),
llvm::cl::init(BasicStoreModel),
llvm::cl::values(
#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN)\
clEnumValN(NAME##Model, CMDFLAG, DESC),
#include "clang/Frontend/Analyses.def"
clEnumValEnd));
static llvm::cl::opt<AnalysisConstraints>
AnalysisConstraintsOpt("analyzer-constraints",
llvm::cl::desc("Source Code Analysis - Symbolic Constraint Engines"),
llvm::cl::init(RangeConstraintsModel),
llvm::cl::values(
#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN)\
clEnumValN(NAME##Model, CMDFLAG, DESC),
#include "clang/Frontend/Analyses.def"
clEnumValEnd));
static llvm::cl::opt<AnalysisDiagClients>
AnalysisDiagOpt("analyzer-output",
llvm::cl::desc("Source Code Analysis - Output Options"),
llvm::cl::init(PD_HTML),
llvm::cl::values(
#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE)\
clEnumValN(PD_##NAME, CMDFLAG, DESC),
#include "clang/Frontend/Analyses.def"
clEnumValEnd));
static llvm::cl::opt<bool>
VisualizeEGDot("analyzer-viz-egraph-graphviz",
llvm::cl::desc("Display exploded graph using GraphViz"));
static llvm::cl::opt<bool>
VisualizeEGUbi("analyzer-viz-egraph-ubigraph",
llvm::cl::desc("Display exploded graph using Ubigraph"));
static llvm::cl::opt<bool>
AnalyzeAll("analyzer-opt-analyze-headers",
llvm::cl::desc("Force the static analyzer to analyze "
"functions defined in header files"));
static llvm::cl::opt<bool>
AnalyzerDisplayProgress("analyzer-display-progress",
llvm::cl::desc("Emit verbose output about the analyzer's progress."));
static llvm::cl::opt<bool>
PurgeDead("analyzer-purge-dead",
llvm::cl::init(true),
llvm::cl::desc("Remove dead symbols, bindings, and constraints before"
" processing a statement."));
static llvm::cl::opt<bool>
EagerlyAssume("analyzer-eagerly-assume",
llvm::cl::init(false),
llvm::cl::desc("Eagerly assume the truth/falseness of some "
"symbolic constraints."));
static llvm::cl::opt<std::string>
AnalyzeSpecificFunction("analyze-function",
llvm::cl::desc("Run analysis on specific function"));
static llvm::cl::opt<bool>
TrimGraph("trim-egraph",
llvm::cl::desc("Only show error-related paths in the analysis graph"));
static AnalyzerOptions ReadAnalyzerOptions() {
AnalyzerOptions Opts;
Opts.AnalysisList = AnalysisList;
Opts.AnalysisStoreOpt = AnalysisStoreOpt;
Opts.AnalysisConstraintsOpt = AnalysisConstraintsOpt;
Opts.AnalysisDiagOpt = AnalysisDiagOpt;
Opts.VisualizeEGDot = VisualizeEGDot;
Opts.VisualizeEGUbi = VisualizeEGUbi;
Opts.AnalyzeAll = AnalyzeAll;
Opts.AnalyzerDisplayProgress = AnalyzerDisplayProgress;
Opts.PurgeDead = PurgeDead;
Opts.EagerlyAssume = EagerlyAssume;
Opts.AnalyzeSpecificFunction = AnalyzeSpecificFunction;
Opts.TrimGraph = TrimGraph;
return Opts;
}
//===----------------------------------------------------------------------===//
// -dump-build-information Stuff
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
DumpBuildInformation("dump-build-information",
llvm::cl::value_desc("filename"),
llvm::cl::desc("output a dump of some build information to a file"));
static llvm::raw_ostream *BuildLogFile = 0;
/// LoggingDiagnosticClient - This is a simple diagnostic client that forwards
/// all diagnostics to both BuildLogFile and a chained DiagnosticClient.
namespace {
class LoggingDiagnosticClient : public DiagnosticClient {
llvm::OwningPtr<DiagnosticClient> Chain1;
llvm::OwningPtr<DiagnosticClient> Chain2;
public:
LoggingDiagnosticClient(DiagnosticClient *Normal) {
// Output diags both where requested...
Chain1.reset(Normal);
// .. and to our log file.
Chain2.reset(new TextDiagnosticPrinter(*BuildLogFile,
!NoShowColumn,
!NoCaretDiagnostics,
!NoShowLocation,
PrintSourceRangeInfo,
PrintDiagnosticOption,
!NoDiagnosticsFixIt,
MessageLength));
}
virtual void setLangOptions(const LangOptions *LO) {
Chain1->setLangOptions(LO);
Chain2->setLangOptions(LO);
}
virtual bool IncludeInDiagnosticCounts() const {
return Chain1->IncludeInDiagnosticCounts();
}
virtual void HandleDiagnostic(Diagnostic::Level DiagLevel,
const DiagnosticInfo &Info) {
Chain1->HandleDiagnostic(DiagLevel, Info);
Chain2->HandleDiagnostic(DiagLevel, Info);
}
};
} // end anonymous namespace.
static void SetUpBuildDumpLog(unsigned argc, char **argv,
llvm::OwningPtr<DiagnosticClient> &DiagClient) {
std::string ErrorInfo;
BuildLogFile = new llvm::raw_fd_ostream(DumpBuildInformation.c_str(), false,
/*Force=*/true, ErrorInfo);
if (!ErrorInfo.empty()) {
llvm::errs() << "error opening -dump-build-information file '"
<< DumpBuildInformation << "', option ignored!\n";
delete BuildLogFile;
BuildLogFile = 0;
DumpBuildInformation = "";
return;
}
(*BuildLogFile) << "clang-cc command line arguments: ";
for (unsigned i = 0; i != argc; ++i)
(*BuildLogFile) << argv[i] << ' ';
(*BuildLogFile) << '\n';
// LoggingDiagnosticClient - Insert a new logging diagnostic client in between
// the diagnostic producers and the normal receiver.
DiagClient.reset(new LoggingDiagnosticClient(DiagClient.take()));
}
//===----------------------------------------------------------------------===//
// Main driver
//===----------------------------------------------------------------------===//
static llvm::raw_ostream* ComputeOutFile(const std::string& InFile,
const char* Extension,
bool Binary,
llvm::sys::Path& OutPath) {
llvm::raw_ostream* Ret;
bool UseStdout = false;
std::string OutFile;
if (OutputFile == "-" || (OutputFile.empty() && InFile == "-")) {
UseStdout = true;
} else if (!OutputFile.empty()) {
OutFile = OutputFile;
} else if (Extension) {
llvm::sys::Path Path(InFile);
Path.eraseSuffix();
Path.appendSuffix(Extension);
OutFile = Path.toString();
} else {
UseStdout = true;
}
if (UseStdout) {
Ret = new llvm::raw_stdout_ostream();
if (Binary)
llvm::sys::Program::ChangeStdoutToBinary();
} else {
std::string Error;
Ret = new llvm::raw_fd_ostream(OutFile.c_str(), Binary,
/*Force=*/true, Error);
if (!Error.empty()) {
// FIXME: Don't fail this way.
llvm::cerr << "ERROR: " << Error << "\n";
::exit(1);
}
OutPath = OutFile;
}
return Ret;
}
/// ProcessInputFile - Process a single input file with the specified state.
///
static void ProcessInputFile(Preprocessor &PP, PreprocessorFactory &PPF,
const std::string &InFile, ProgActions PA,
const llvm::StringMap<bool> &Features,
llvm::LLVMContext& Context) {
llvm::OwningPtr<llvm::raw_ostream> OS;
llvm::OwningPtr<ASTConsumer> Consumer;
bool ClearSourceMgr = false;
FixItRewriter *FixItRewrite = 0;
bool CompleteTranslationUnit = true;
llvm::sys::Path OutPath;
switch (PA) {
default:
fprintf(stderr, "Unexpected program action!\n");
HadErrors = true;
return;
case ASTPrint:
OS.reset(ComputeOutFile(InFile, 0, false, OutPath));
Consumer.reset(CreateASTPrinter(OS.get()));
break;
case ASTPrintXML:
OS.reset(ComputeOutFile(InFile, "xml", false, OutPath));
Consumer.reset(CreateASTPrinterXML(OS.get()));
break;
case ASTDump:
Consumer.reset(CreateASTDumper());
break;
case ASTView:
Consumer.reset(CreateASTViewer());
break;
case PrintDeclContext:
Consumer.reset(CreateDeclContextPrinter());
break;
case EmitHTML:
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
Consumer.reset(CreateHTMLPrinter(OS.get(), PP.getDiagnostics(), &PP, &PPF));
break;
case InheritanceView:
Consumer.reset(CreateInheritanceViewer(InheritanceViewCls));
break;
case EmitAssembly:
case EmitLLVM:
case EmitBC:
case EmitLLVMOnly: {
BackendAction Act;
if (ProgAction == EmitAssembly) {
Act = Backend_EmitAssembly;
OS.reset(ComputeOutFile(InFile, "s", true, OutPath));
} else if (ProgAction == EmitLLVM) {
Act = Backend_EmitLL;
OS.reset(ComputeOutFile(InFile, "ll", true, OutPath));
} else if (ProgAction == EmitLLVMOnly) {
Act = Backend_EmitNothing;
} else {
Act = Backend_EmitBC;
OS.reset(ComputeOutFile(InFile, "bc", true, OutPath));
}
CompileOptions Opts;
InitializeCompileOptions(Opts, PP.getLangOptions(), Features);
Consumer.reset(CreateBackendConsumer(Act, PP.getDiagnostics(),
PP.getLangOptions(), Opts, InFile,
OS.get(), Context));
break;
}
case GeneratePCH:
if (RelocatablePCH.getValue() && !isysroot.getNumOccurrences()) {
PP.Diag(SourceLocation(), diag::err_relocatable_without_without_isysroot);
RelocatablePCH.setValue(false);
}
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
if (RelocatablePCH.getValue())
Consumer.reset(CreatePCHGenerator(PP, OS.get(), isysroot.c_str()));
else
Consumer.reset(CreatePCHGenerator(PP, OS.get()));
CompleteTranslationUnit = false;
break;
case RewriteObjC:
OS.reset(ComputeOutFile(InFile, "cpp", true, OutPath));
Consumer.reset(CreateObjCRewriter(InFile, OS.get(), PP.getDiagnostics(),
PP.getLangOptions(),
SilenceRewriteMacroWarning));
break;
case RewriteBlocks:
Consumer.reset(CreateBlockRewriter(InFile, PP.getDiagnostics(),
PP.getLangOptions()));
break;
case RunAnalysis: {
Consumer.reset(CreateAnalysisConsumer(PP.getDiagnostics(), &PP, &PPF,
PP.getLangOptions(), OutputFile,
ReadAnalyzerOptions()));
break;
}
case DumpRawTokens: {
llvm::TimeRegion Timer(ClangFrontendTimer);
SourceManager &SM = PP.getSourceManager();
// Start lexing the specified input file.
Lexer RawLex(SM.getMainFileID(), SM, PP.getLangOptions());
RawLex.SetKeepWhitespaceMode(true);
Token RawTok;
RawLex.LexFromRawLexer(RawTok);
while (RawTok.isNot(tok::eof)) {
PP.DumpToken(RawTok, true);
fprintf(stderr, "\n");
RawLex.LexFromRawLexer(RawTok);
}
ClearSourceMgr = true;
break;
}
case DumpTokens: { // Token dump mode.
llvm::TimeRegion Timer(ClangFrontendTimer);
Token Tok;
// Start preprocessing the specified input file.
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
PP.DumpToken(Tok, true);
fprintf(stderr, "\n");
} while (Tok.isNot(tok::eof));
ClearSourceMgr = true;
break;
}
case RunPreprocessorOnly:
break;
case GeneratePTH: {
llvm::TimeRegion Timer(ClangFrontendTimer);
if (OutputFile.empty() || OutputFile == "-") {
// FIXME: Don't fail this way.
// FIXME: Verify that we can actually seek in the given file.
llvm::cerr << "ERROR: PTH requires an seekable file for output!\n";
::exit(1);
}
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
CacheTokens(PP, static_cast<llvm::raw_fd_ostream*>(OS.get()));
ClearSourceMgr = true;
break;
}
case PrintPreprocessedInput:
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
break;
case ParseNoop:
break;
case ParsePrintCallbacks: {
llvm::TimeRegion Timer(ClangFrontendTimer);
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
ParseFile(PP, CreatePrintParserActionsAction(PP, OS.get()));
ClearSourceMgr = true;
break;
}
case ParseSyntaxOnly: { // -fsyntax-only
llvm::TimeRegion Timer(ClangFrontendTimer);
Consumer.reset(new ASTConsumer());
break;
}
case RewriteMacros:
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
RewriteMacrosInInput(PP, OS.get());
ClearSourceMgr = true;
break;
case RewriteTest:
OS.reset(ComputeOutFile(InFile, 0, true, OutPath));
DoRewriteTest(PP, OS.get());
ClearSourceMgr = true;
break;
case FixIt:
llvm::TimeRegion Timer(ClangFrontendTimer);
Consumer.reset(new ASTConsumer());
FixItRewrite = new FixItRewriter(PP.getDiagnostics(),
PP.getSourceManager(),
PP.getLangOptions());
break;
}
if (FixItAtLocations.size() > 0) {
// Even without the "-fixit" flag, with may have some specific
// locations where the user has requested fixes. Process those
// locations now.
if (!FixItRewrite)
FixItRewrite = new FixItRewriter(PP.getDiagnostics(),
PP.getSourceManager(),
PP.getLangOptions());
bool AddedFixitLocation = false;
for (unsigned Idx = 0, Last = FixItAtLocations.size();
Idx != Last; ++Idx) {
RequestedSourceLocation Requested;
if (ResolveParsedLocation(FixItAtLocations[Idx],
PP.getFileManager(), Requested)) {
fprintf(stderr, "FIX-IT could not find file \"%s\"\n",
FixItAtLocations[Idx].FileName.c_str());
} else {
FixItRewrite->addFixItLocation(Requested);
AddedFixitLocation = true;
}
}
if (!AddedFixitLocation) {
// All of the fix-it locations were bad. Don't fix anything.
delete FixItRewrite;
FixItRewrite = 0;
}
}
llvm::OwningPtr<ASTContext> ContextOwner;
if (Consumer)
ContextOwner.reset(new ASTContext(PP.getLangOptions(),
PP.getSourceManager(),
PP.getTargetInfo(),
PP.getIdentifierTable(),
PP.getSelectorTable(),
PP.getBuiltinInfo(),
/* FreeMemory = */ !DisableFree,
/* size_reserve = */0));
llvm::OwningPtr<PCHReader> Reader;
llvm::OwningPtr<ExternalASTSource> Source;
if (!ImplicitIncludePCH.empty()) {
// If the user specified -isysroot, it will be used for relocatable PCH
// files.
const char *isysrootPCH = 0;
if (isysroot.getNumOccurrences() != 0)
isysrootPCH = isysroot.c_str();
Reader.reset(new PCHReader(PP, ContextOwner.get(), isysrootPCH));
// The user has asked us to include a precompiled header. Load
// the precompiled header into the AST context.
switch (Reader->ReadPCH(ImplicitIncludePCH)) {
case PCHReader::Success: {
// Set the predefines buffer as suggested by the PCH
// reader. Typically, the predefines buffer will be empty.
PP.setPredefines(Reader->getSuggestedPredefines());
// Attach the PCH reader to the AST context as an external AST
// source, so that declarations will be deserialized from the
// PCH file as needed.
if (ContextOwner) {
Source.reset(Reader.take());
ContextOwner->setExternalSource(Source);
}
break;
}
case PCHReader::Failure:
// Unrecoverable failure: don't even try to process the input
// file.
return;
case PCHReader::IgnorePCH:
// No suitable PCH file could be found. Return an error.
return;
#if 0
// FIXME: We can recover from failed attempts to load PCH
// files. This code will do so, if we ever want to enable it.
// We delayed the initialization of builtins in the hope of
// loading the PCH file. Since the PCH file could not be
// loaded, initialize builtins now.
if (ContextOwner)
ContextOwner->InitializeBuiltins(PP.getIdentifierTable());
#endif
}
// Finish preprocessor initialization. We do this now (rather
// than earlier) because this initialization creates new source
// location entries in the source manager, which must come after
// the source location entries for the PCH file.
if (InitializeSourceManager(PP, InFile))
return;
}
// If we have an ASTConsumer, run the parser with it.
if (Consumer)
ParseAST(PP, Consumer.get(), *ContextOwner.get(), Stats,
CompleteTranslationUnit);
if (PA == RunPreprocessorOnly) { // Just lex as fast as we can, no output.
llvm::TimeRegion Timer(ClangFrontendTimer);
Token Tok;
// Start parsing the specified input file.
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
} while (Tok.isNot(tok::eof));
ClearSourceMgr = true;
} else if (PA == ParseNoop) { // -parse-noop
llvm::TimeRegion Timer(ClangFrontendTimer);
ParseFile(PP, new MinimalAction(PP));
ClearSourceMgr = true;
} else if (PA == PrintPreprocessedInput){ // -E mode.
llvm::TimeRegion Timer(ClangFrontendTimer);
if (DumpMacros)
DoPrintMacros(PP, OS.get());
else
DoPrintPreprocessedInput(PP, OS.get(), EnableCommentOutput,
EnableMacroCommentOutput,
DisableLineMarkers, DumpDefines);
ClearSourceMgr = true;
}
if (FixItRewrite)
FixItRewrite->WriteFixedFile(InFile, OutputFile);
// Disable the consumer prior to the context, the consumer may perform actions
// in its destructor which require the context.
if (DisableFree)
Consumer.take();
else
Consumer.reset();
// If in -disable-free mode, don't deallocate ASTContext.
if (DisableFree)
ContextOwner.take();
else
ContextOwner.reset(); // Delete ASTContext
if (VerifyDiagnostics)
if (CheckDiagnostics(PP))
exit(1);
if (Stats) {
fprintf(stderr, "\nSTATISTICS FOR '%s':\n", InFile.c_str());
PP.PrintStats();
PP.getIdentifierTable().PrintStats();
PP.getHeaderSearchInfo().PrintStats();
PP.getSourceManager().PrintStats();
fprintf(stderr, "\n");
}
// For a multi-file compilation, some things are ok with nuking the source
// manager tables, other require stable fileid/macroid's across multiple
// files.
if (ClearSourceMgr)
PP.getSourceManager().clearIDTables();
// Always delete the output stream because we don't want to leak file
// handles. Also, we don't want to try to erase an open file.
OS.reset();
if ((HadErrors || (PP.getDiagnostics().getNumErrors() != 0)) &&
!OutPath.isEmpty()) {
// If we had errors, try to erase the output file.
OutPath.eraseFromDisk();
}
}
static llvm::cl::list<std::string>
InputFilenames(llvm::cl::Positional, llvm::cl::desc("<input files>"));
static void LLVMErrorHandler(void *UserData, const std::string &Message) {
Diagnostic &Diags = *static_cast<Diagnostic*>(UserData);
Diags.Report(FullSourceLoc(), diag::err_fe_error_backend) << Message;
// We cannot recover from llvm errors.
exit(1);
}
int main(int argc, char **argv) {
llvm::sys::PrintStackTraceOnErrorSignal();
llvm::PrettyStackTraceProgram X(argc, argv);
llvm::LLVMContext &Context = llvm::getGlobalContext();
llvm::cl::ParseCommandLineOptions(argc, argv,
"LLVM 'Clang' Compiler: http://clang.llvm.org\n");
llvm::InitializeAllTargets();
llvm::InitializeAllAsmPrinters();
if (TimeReport)
ClangFrontendTimer = new llvm::Timer("Clang front-end time");
if (Verbose)
fprintf(stderr, "clang-cc version 1.0 based upon " PACKAGE_STRING
" hosted on " LLVM_HOSTTRIPLE "\n");
// If no input was specified, read from stdin.
if (InputFilenames.empty())
InputFilenames.push_back("-");
// Create the diagnostic client for reporting errors or for
// implementing -verify.
llvm::OwningPtr<DiagnosticClient> DiagClient;
if (VerifyDiagnostics) {
// When checking diagnostics, just buffer them up.
DiagClient.reset(new TextDiagnosticBuffer());
if (InputFilenames.size() != 1) {
fprintf(stderr, "-verify only works on single input files for now.\n");
return 1;
}
if (!HTMLDiag.empty()) {
fprintf(stderr, "-verify and -html-diags don't work together\n");
return 1;
}
} else if (HTMLDiag.empty()) {
// Print diagnostics to stderr by default.
// If -fmessage-length=N was not specified, determine whether this
// is a terminal and, if so, implicitly define -fmessage-length
// appropriately.
if (MessageLength.getNumOccurrences() == 0)
MessageLength.setValue(llvm::sys::Process::StandardErrColumns());
if (!NoColorDiagnostic) {
NoColorDiagnostic.setValue(!llvm::sys::Process::StandardErrHasColors());
}
DiagClient.reset(new TextDiagnosticPrinter(llvm::errs(),
!NoShowColumn,
!NoCaretDiagnostics,
!NoShowLocation,
PrintSourceRangeInfo,
PrintDiagnosticOption,
!NoDiagnosticsFixIt,
MessageLength,
!NoColorDiagnostic));
} else {
DiagClient.reset(CreateHTMLDiagnosticClient(HTMLDiag));
}
if (!DumpBuildInformation.empty()) {
if (!HTMLDiag.empty()) {
fprintf(stderr,
"-dump-build-information and -html-diags don't work together\n");
return 1;
}
SetUpBuildDumpLog(argc, argv, DiagClient);
}
// Configure our handling of diagnostics.
Diagnostic Diags(DiagClient.get());
if (ProcessWarningOptions(Diags, OptWarnings, OptPedantic, OptPedanticErrors,
OptNoWarnings))
return 1;
// Set an error handler, so that any LLVM backend diagnostics go through our
// error handler.
llvm::llvm_install_error_handler(LLVMErrorHandler,
static_cast<void*>(&Diags));
// -I- is a deprecated GCC feature, scan for it and reject it.
for (unsigned i = 0, e = I_dirs.size(); i != e; ++i) {
if (I_dirs[i] == "-") {
Diags.Report(FullSourceLoc(), diag::err_pp_I_dash_not_supported);
I_dirs.erase(I_dirs.begin()+i);
--i;
}
}
// Get information about the target being compiled for.
std::string Triple = CreateTargetTriple();
llvm::OwningPtr<TargetInfo> Target(TargetInfo::CreateTargetInfo(Triple));
if (Target == 0) {
Diags.Report(FullSourceLoc(), diag::err_fe_unknown_triple)
<< Triple.c_str();
return 1;
}
if (!InheritanceViewCls.empty()) // C++ visualization?
ProgAction = InheritanceView;
llvm::OwningPtr<SourceManager> SourceMgr;
// Create a file manager object to provide access to and cache the filesystem.
FileManager FileMgr;
// Compute the feature set, unfortunately this effects the language!
llvm::StringMap<bool> Features;
ComputeFeatureMap(Target.get(), Features);
for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
const std::string &InFile = InputFilenames[i];
/// Create a SourceManager object. This tracks and owns all the file
/// buffers allocated to a translation unit.
if (!SourceMgr)
SourceMgr.reset(new SourceManager());
else
SourceMgr->clearIDTables();
// Initialize language options, inferring file types from input filenames.
LangOptions LangInfo;
DiagClient->setLangOptions(&LangInfo);
InitializeBaseLanguage();
LangKind LK = GetLanguage(InFile);
InitializeLangOptions(LangInfo, LK);
InitializeLanguageStandard(LangInfo, LK, Target.get(), Features);
// Process the -I options and set them in the HeaderInfo.
HeaderSearch HeaderInfo(FileMgr);
InitializeIncludePaths(argv[0], HeaderInfo, FileMgr, LangInfo);
// Set up the preprocessor with these options.
DriverPreprocessorFactory PPFactory(Diags, LangInfo, *Target,
*SourceMgr.get(), HeaderInfo);
llvm::OwningPtr<Preprocessor> PP(PPFactory.CreatePreprocessor());
if (!PP)
continue;
// Handle generating dependencies, if requested
if (!DependencyFile.empty()) {
llvm::raw_ostream *DependencyOS;
if (DependencyTargets.empty()) {
// FIXME: Use a proper diagnostic
llvm::cerr << "-dependency-file requires at least one -MT option\n";
HadErrors = true;
continue;
}
std::string ErrStr;
DependencyOS =
new llvm::raw_fd_ostream(DependencyFile.c_str(), false,
/*Force=*/true, ErrStr);
if (!ErrStr.empty()) {
// FIXME: Use a proper diagnostic
llvm::cerr << "unable to open dependency file: " + ErrStr;
HadErrors = true;
continue;
}
AttachDependencyFileGen(PP.get(), DependencyOS, DependencyTargets,
DependenciesIncludeSystemHeaders,
PhonyDependencyTarget);
}
if (ImplicitIncludePCH.empty()) {
if (InitializeSourceManager(*PP.get(), InFile))
continue;
// Initialize builtin info.
PP->getBuiltinInfo().InitializeBuiltins(PP->getIdentifierTable(),
PP->getLangOptions().NoBuiltin);
}
if (!HTMLDiag.empty())
((PathDiagnosticClient*)DiagClient.get())->SetPreprocessor(PP.get());
// Process the source file.
ProcessInputFile(*PP, PPFactory, InFile, ProgAction, Features, Context);
HeaderInfo.ClearFileInfo();
DiagClient->setLangOptions(0);
}
if (!NoCaretDiagnostics)
if (unsigned NumDiagnostics = Diags.getNumDiagnostics())
fprintf(stderr, "%d diagnostic%s generated.\n", NumDiagnostics,
(NumDiagnostics == 1 ? "" : "s"));
if (Stats) {
FileMgr.PrintStats();
fprintf(stderr, "\n");
}
delete ClangFrontendTimer;
delete BuildLogFile;
// If verifying diagnostics and we reached here, all is well.
if (VerifyDiagnostics)
return 0;
// Managed static deconstruction. Useful for making things like
// -time-passes usable.
llvm::llvm_shutdown();
return HadErrors || (Diags.getNumErrors() != 0);
}