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+//===-- cc1_main.cpp - Clang CC1 Compiler Frontend ------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is the entry point to the clang -cc1 functionality, which implements the
+// core compiler functionality along with a number of additional tools for
+// demonstration and testing purposes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Driver/Arg.h"
+#include "clang/Driver/ArgList.h"
+#include "clang/Driver/CC1Options.h"
+#include "clang/Driver/DriverDiagnostic.h"
+#include "clang/Driver/OptTable.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/CompilerInvocation.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/TextDiagnosticBuffer.h"
+#include "clang/Frontend/TextDiagnosticPrinter.h"
+#include "clang/FrontendTool/Utils.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/Timer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/LinkAllPasses.h"
+#include <cstdio>
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// Main driver
+//===----------------------------------------------------------------------===//
+
+static void LLVMErrorHandler(void *UserData, const std::string &Message) {
+ DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
+
+ Diags.Report(diag::err_fe_error_backend) << Message;
+
+ // We cannot recover from llvm errors.
+ exit(1);
+}
+
+// FIXME: Define the need for this testing away.
+static int cc1_test(DiagnosticsEngine &Diags,
+ const char **ArgBegin, const char **ArgEnd) {
+ using namespace clang::driver;
+
+ llvm::errs() << "cc1 argv:";
+ for (const char **i = ArgBegin; i != ArgEnd; ++i)
+ llvm::errs() << " \"" << *i << '"';
+ llvm::errs() << "\n";
+
+ // Parse the arguments.
+ OptTable *Opts = createCC1OptTable();
+ unsigned MissingArgIndex, MissingArgCount;
+ InputArgList *Args = Opts->ParseArgs(ArgBegin, ArgEnd,
+ MissingArgIndex, MissingArgCount);
+
+ // Check for missing argument error.
+ if (MissingArgCount)
+ Diags.Report(clang::diag::err_drv_missing_argument)
+ << Args->getArgString(MissingArgIndex) << MissingArgCount;
+
+ // Dump the parsed arguments.
+ llvm::errs() << "cc1 parsed options:\n";
+ for (ArgList::const_iterator it = Args->begin(), ie = Args->end();
+ it != ie; ++it)
+ (*it)->dump();
+
+ // Create a compiler invocation.
+ llvm::errs() << "cc1 creating invocation.\n";
+ CompilerInvocation Invocation;
+ if (!CompilerInvocation::CreateFromArgs(Invocation, ArgBegin, ArgEnd, Diags))
+ return 1;
+
+ // Convert the invocation back to argument strings.
+ std::vector<std::string> InvocationArgs;
+ Invocation.toArgs(InvocationArgs);
+
+ // Dump the converted arguments.
+ SmallVector<const char*, 32> Invocation2Args;
+ llvm::errs() << "invocation argv :";
+ for (unsigned i = 0, e = InvocationArgs.size(); i != e; ++i) {
+ Invocation2Args.push_back(InvocationArgs[i].c_str());
+ llvm::errs() << " \"" << InvocationArgs[i] << '"';
+ }
+ llvm::errs() << "\n";
+
+ // Convert those arguments to another invocation, and check that we got the
+ // same thing.
+ CompilerInvocation Invocation2;
+ if (!CompilerInvocation::CreateFromArgs(Invocation2, Invocation2Args.begin(),
+ Invocation2Args.end(), Diags))
+ return 1;
+
+ // FIXME: Implement CompilerInvocation comparison.
+ if (true) {
+ //llvm::errs() << "warning: Invocations differ!\n";
+
+ std::vector<std::string> Invocation2Args;
+ Invocation2.toArgs(Invocation2Args);
+ llvm::errs() << "invocation2 argv:";
+ for (unsigned i = 0, e = Invocation2Args.size(); i != e; ++i)
+ llvm::errs() << " \"" << Invocation2Args[i] << '"';
+ llvm::errs() << "\n";
+ }
+
+ return 0;
+}
+
+int cc1_main(const char **ArgBegin, const char **ArgEnd,
+ const char *Argv0, void *MainAddr) {
+ OwningPtr<CompilerInstance> Clang(new CompilerInstance());
+ IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
+
+ // Run clang -cc1 test.
+ if (ArgBegin != ArgEnd && StringRef(ArgBegin[0]) == "-cc1test") {
+ DiagnosticsEngine Diags(DiagID, new TextDiagnosticPrinter(llvm::errs(),
+ DiagnosticOptions()));
+ return cc1_test(Diags, ArgBegin + 1, ArgEnd);
+ }
+
+ // Initialize targets first, so that --version shows registered targets.
+ llvm::InitializeAllTargets();
+ llvm::InitializeAllTargetMCs();
+ llvm::InitializeAllAsmPrinters();
+ llvm::InitializeAllAsmParsers();
+
+ // Buffer diagnostics from argument parsing so that we can output them using a
+ // well formed diagnostic object.
+ TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer;
+ DiagnosticsEngine Diags(DiagID, DiagsBuffer);
+ bool Success;
+ Success = CompilerInvocation::CreateFromArgs(Clang->getInvocation(),
+ ArgBegin, ArgEnd, Diags);
+
+ // Infer the builtin include path if unspecified.
+ if (Clang->getHeaderSearchOpts().UseBuiltinIncludes &&
+ Clang->getHeaderSearchOpts().ResourceDir.empty())
+ Clang->getHeaderSearchOpts().ResourceDir =
+ CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
+
+ // Create the actual diagnostics engine.
+ Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin));
+ if (!Clang->hasDiagnostics())
+ return 1;
+
+ // Set an error handler, so that any LLVM backend diagnostics go through our
+ // error handler.
+ llvm::install_fatal_error_handler(LLVMErrorHandler,
+ static_cast<void*>(&Clang->getDiagnostics()));
+
+ DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics());
+ if (!Success)
+ return 1;
+
+ // Execute the frontend actions.
+ Success = ExecuteCompilerInvocation(Clang.get());
+
+ // If any timers were active but haven't been destroyed yet, print their
+ // results now. This happens in -disable-free mode.
+ llvm::TimerGroup::printAll(llvm::errs());
+
+ // Our error handler depends on the Diagnostics object, which we're
+ // potentially about to delete. Uninstall the handler now so that any
+ // later errors use the default handling behavior instead.
+ llvm::remove_fatal_error_handler();
+
+ // When running with -disable-free, don't do any destruction or shutdown.
+ if (Clang->getFrontendOpts().DisableFree) {
+ if (llvm::AreStatisticsEnabled() || Clang->getFrontendOpts().ShowStats)
+ llvm::PrintStatistics();
+ Clang.take();
+ return !Success;
+ }
+
+ // Managed static deconstruction. Useful for making things like
+ // -time-passes usable.
+ llvm::llvm_shutdown();
+
+ return !Success;
+}