forked from OSchip/llvm-project
193 lines
7.0 KiB
C++
193 lines
7.0 KiB
C++
//===-- cc1_main.cpp - Clang CC1 Compiler Frontend ------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the entry point to the clang -cc1 functionality, which implements the
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// core compiler functionality along with a number of additional tools for
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// demonstration and testing purposes.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Driver/Arg.h"
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#include "clang/Driver/ArgList.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "clang/Driver/OptTable.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "clang/Frontend/TextDiagnosticBuffer.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/FrontendTool/Utils.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/LinkAllPasses.h"
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#include <cstdio>
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Main driver
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//===----------------------------------------------------------------------===//
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static void LLVMErrorHandler(void *UserData, const std::string &Message) {
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DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
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Diags.Report(diag::err_fe_error_backend) << Message;
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// We cannot recover from llvm errors.
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exit(1);
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}
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// FIXME: Define the need for this testing away.
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static int cc1_test(DiagnosticsEngine &Diags,
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const char **ArgBegin, const char **ArgEnd) {
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using namespace clang::driver;
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llvm::errs() << "cc1 argv:";
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for (const char **i = ArgBegin; i != ArgEnd; ++i)
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llvm::errs() << " \"" << *i << '"';
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llvm::errs() << "\n";
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// Parse the arguments.
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OptTable *Opts = createDriverOptTable();
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unsigned MissingArgIndex, MissingArgCount;
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InputArgList *Args = Opts->ParseArgs(ArgBegin, ArgEnd,
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MissingArgIndex, MissingArgCount);
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// Check for missing argument error.
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if (MissingArgCount)
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Diags.Report(clang::diag::err_drv_missing_argument)
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<< Args->getArgString(MissingArgIndex) << MissingArgCount;
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// Dump the parsed arguments.
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llvm::errs() << "cc1 parsed options:\n";
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for (ArgList::const_iterator it = Args->begin(), ie = Args->end();
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it != ie; ++it)
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(*it)->dump();
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// Create a compiler invocation.
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llvm::errs() << "cc1 creating invocation.\n";
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CompilerInvocation Invocation;
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if (!CompilerInvocation::CreateFromArgs(Invocation, ArgBegin, ArgEnd, Diags))
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return 1;
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// Convert the invocation back to argument strings.
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std::vector<std::string> InvocationArgs;
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Invocation.toArgs(InvocationArgs);
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// Dump the converted arguments.
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SmallVector<const char*, 32> Invocation2Args;
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llvm::errs() << "invocation argv :";
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for (unsigned i = 0, e = InvocationArgs.size(); i != e; ++i) {
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Invocation2Args.push_back(InvocationArgs[i].c_str());
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llvm::errs() << " \"" << InvocationArgs[i] << '"';
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}
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llvm::errs() << "\n";
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// Convert those arguments to another invocation, and check that we got the
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// same thing.
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CompilerInvocation Invocation2;
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if (!CompilerInvocation::CreateFromArgs(Invocation2, Invocation2Args.begin(),
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Invocation2Args.end(), Diags))
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return 1;
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// FIXME: Implement CompilerInvocation comparison.
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if (true) {
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//llvm::errs() << "warning: Invocations differ!\n";
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std::vector<std::string> Invocation2Args;
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Invocation2.toArgs(Invocation2Args);
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llvm::errs() << "invocation2 argv:";
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for (unsigned i = 0, e = Invocation2Args.size(); i != e; ++i)
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llvm::errs() << " \"" << Invocation2Args[i] << '"';
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llvm::errs() << "\n";
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}
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return 0;
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}
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int cc1_main(const char **ArgBegin, const char **ArgEnd,
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const char *Argv0, void *MainAddr) {
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OwningPtr<CompilerInstance> Clang(new CompilerInstance());
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IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
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// Run clang -cc1 test.
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if (ArgBegin != ArgEnd && StringRef(ArgBegin[0]) == "-cc1test") {
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IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
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DiagnosticsEngine Diags(DiagID, &*DiagOpts,
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new TextDiagnosticPrinter(llvm::errs(),
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&*DiagOpts));
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return cc1_test(Diags, ArgBegin + 1, ArgEnd);
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}
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// Initialize targets first, so that --version shows registered targets.
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llvm::InitializeAllTargets();
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llvm::InitializeAllTargetMCs();
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llvm::InitializeAllAsmPrinters();
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llvm::InitializeAllAsmParsers();
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// Buffer diagnostics from argument parsing so that we can output them using a
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// well formed diagnostic object.
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IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
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TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer;
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DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagsBuffer);
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bool Success;
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Success = CompilerInvocation::CreateFromArgs(Clang->getInvocation(),
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ArgBegin, ArgEnd, Diags);
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// Infer the builtin include path if unspecified.
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if (Clang->getHeaderSearchOpts().UseBuiltinIncludes &&
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Clang->getHeaderSearchOpts().ResourceDir.empty())
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Clang->getHeaderSearchOpts().ResourceDir =
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CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
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// Create the actual diagnostics engine.
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Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin));
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if (!Clang->hasDiagnostics())
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return 1;
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// Set an error handler, so that any LLVM backend diagnostics go through our
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// error handler.
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llvm::install_fatal_error_handler(LLVMErrorHandler,
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static_cast<void*>(&Clang->getDiagnostics()));
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DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics());
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if (!Success)
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return 1;
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// Execute the frontend actions.
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Success = ExecuteCompilerInvocation(Clang.get());
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// If any timers were active but haven't been destroyed yet, print their
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// results now. This happens in -disable-free mode.
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llvm::TimerGroup::printAll(llvm::errs());
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// Our error handler depends on the Diagnostics object, which we're
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// potentially about to delete. Uninstall the handler now so that any
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// later errors use the default handling behavior instead.
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llvm::remove_fatal_error_handler();
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// When running with -disable-free, don't do any destruction or shutdown.
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if (Clang->getFrontendOpts().DisableFree) {
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if (llvm::AreStatisticsEnabled() || Clang->getFrontendOpts().ShowStats)
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llvm::PrintStatistics();
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Clang.take();
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return !Success;
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}
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// Managed static deconstruction. Useful for making things like
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// -time-passes usable.
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llvm::llvm_shutdown();
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return !Success;
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}
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