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e37d2393d1
...and probably should not be emitted before optimization passes. The new frontend got this wrong, and the old one pretended to allow it but then silently didn't write a module at all. Swift SVN r13189
316 lines
11 KiB
C++
316 lines
11 KiB
C++
//===-- frontend_main.cpp - Swift Compiler Frontend -----------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This is the entry point to the swift -frontend functionality, which
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/// implements the core compiler functionality along with a number of additional
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/// tools for demonstration and testing purposes.
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///
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//===----------------------------------------------------------------------===//
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#include "swift/Subsystems.h"
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#include "swift/AST/DiagnosticsFrontend.h"
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#include "swift/AST/IRGenOptions.h"
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#include "swift/Basic/SourceManager.h"
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#include "swift/Driver/Options.h"
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#include "swift/Frontend/DiagnosticVerifier.h"
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#include "swift/Frontend/Frontend.h"
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#include "swift/Frontend/PrintingDiagnosticConsumer.h"
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#include "swift/Frontend/SerializedDiagnosticConsumer.h"
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#include "swift/Immediate/Immediate.h"
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#include "swift/SILPasses/Passes.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/raw_ostream.h"
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#include <memory>
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using namespace swift;
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static std::string displayName(StringRef MainExecutablePath) {
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std::string Name = llvm::sys::path::stem(MainExecutablePath);
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Name += " -frontend";
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return Name;
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}
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/// Writes SIL out to the given file.
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static bool writeSIL(SILModule &SM, Module *M, bool EmitVerboseSIL,
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std::string &OutputFilename) {
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std::string ErrorInfo;
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llvm::raw_fd_ostream OS(OutputFilename.c_str(), ErrorInfo);
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if (!ErrorInfo.empty()) {
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M->Ctx.Diags.diagnose(SourceLoc(), diag::error_opening_output,
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OutputFilename, ErrorInfo);
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return true;
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}
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SM.print(OS, EmitVerboseSIL, M);
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return false;
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}
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/// Performs the compile requested by the user.
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/// \returns true on error
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static bool performCompile(CompilerInstance &Instance,
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CompilerInvocation &Invocation,
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ArrayRef<const char *> Args) {
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FrontendOptions::ActionType Action =
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Invocation.getFrontendOptions().RequestedAction;
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Instance.performParse();
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ASTContext &Context = Instance.getASTContext();
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if (Context.hadError())
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return true;
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if (Action == FrontendOptions::REPL) {
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REPLRunLoop(Instance, ProcessCmdLine(Args.begin(), Args.end()));
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return false;
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}
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// We've just been told to perform a parse, so we can return now.
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if (Action == FrontendOptions::Parse)
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return false;
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SourceFile *PrimarySourceFile = Instance.getPrimarySourceFile();
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// We've been told to dump the AST (either after parsing or type-checking,
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// which is already differentiated in CompilerInstance::performParse()),
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// so dump the main source file and return.
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if (Action == FrontendOptions::DumpParse ||
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Action == FrontendOptions::DumpAST) {
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SourceFile *SF = PrimarySourceFile;
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if (!SF) {
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SourceFileKind Kind = Invocation.getInputKind();
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SF = &Instance.getMainModule()->getMainSourceFile(Kind);
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}
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SF->dump();
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return false;
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}
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// We've been told to pretty print the AST, so do that and return.
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if (Action == FrontendOptions::PrintAST) {
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SourceFile *SF = PrimarySourceFile;
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if (!SF) {
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SourceFileKind Kind = Invocation.getInputKind();
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SF = &Instance.getMainModule()->getMainSourceFile(Kind);
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}
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SF->print(llvm::outs(), PrintOptions::printEverything());
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return false;
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}
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assert(Action >= FrontendOptions::EmitSILGen &&
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"All actions not requiring SILGen must have been handled!");
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std::unique_ptr<SILModule> SM = Instance.takeSILModule();
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if (!SM) {
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if (PrimarySourceFile)
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SM = performSILGeneration(*PrimarySourceFile);
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else
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SM = performSILGeneration(Instance.getMainModule());
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auto LinkMode = Invocation.getFrontendOptions().SILLinking;
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if (LinkMode > FrontendOptions::LinkNone)
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performSILLinking(SM.get(), LinkMode == FrontendOptions::LinkAll);
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}
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// We've been told to emit SIL after SILGen, so write it now.
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if (Action == FrontendOptions::EmitSILGen) {
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return writeSIL(*SM, Instance.getMainModule(),
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Invocation.getFrontendOptions().EmitVerboseSIL,
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Invocation.getFrontendOptions().OutputFilename);
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}
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// Perform "stable" optimizations that are invariant across compiler versions.
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if (!Invocation.getDiagnosticOptions().SkipDiagnosticPasses &&
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runSILDiagnosticPasses(*SM))
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return true;
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SM->verify();
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// Perform SIL optimization passes if optimizations haven't been disabled.
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// These may change across compiler versions.
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IRGenOptions &IRGenOpts = Invocation.getIRGenOptions();
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if (IRGenOpts.OptLevel != 0) {
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runSILOptimizationPasses(*SM);
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SM->verify();
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}
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if (!Invocation.getFrontendOptions().ModuleOutputPath.empty()) {
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auto DC = PrimarySourceFile ? ModuleOrSourceFile(PrimarySourceFile) :
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Instance.getMainModule();
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serialize(DC, SM.get(),
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Invocation.getFrontendOptions().ModuleOutputPath.c_str(),
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Invocation.getFrontendOptions().InputFilenames,
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Invocation.getFrontendOptions().ModuleLinkName);
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if (Action == FrontendOptions::EmitModuleOnly)
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return false;
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}
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assert(Action >= FrontendOptions::EmitSIL &&
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"All actions not requiring SILPasses must have been handled!");
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// We've been told to write canonical SIL, so write it now.
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if (Action == FrontendOptions::EmitSIL) {
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return writeSIL(*SM, Instance.getMainModule(),
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Invocation.getFrontendOptions().EmitVerboseSIL,
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Invocation.getFrontendOptions().OutputFilename);
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}
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assert(Action >= FrontendOptions::Immediate &&
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"All actions not requiring IRGen must have been handled!");
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assert(Action != FrontendOptions::REPL &&
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"REPL mode must be handled immediately after Instance.performParse()");
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// Check if we had any errors; if we did, don't proceed to IRGen.
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if (Context.hadError())
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return true;
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// Cleanup instructions/builtin calls not suitable for IRGen.
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performSILCleanup(SM.get());
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// TODO: remove once the frontend understands what action it should perform
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switch (Action) {
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case FrontendOptions::EmitIR:
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IRGenOpts.OutputKind = IRGenOutputKind::LLVMAssembly;
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break;
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case FrontendOptions::EmitBC:
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IRGenOpts.OutputKind = IRGenOutputKind::LLVMBitcode;
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break;
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case FrontendOptions::EmitAssembly:
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IRGenOpts.OutputKind = IRGenOutputKind::NativeAssembly;
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break;
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case FrontendOptions::EmitObject:
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IRGenOpts.OutputKind = IRGenOutputKind::ObjectFile;
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break;
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case FrontendOptions::Immediate: {
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assert(!PrimarySourceFile && "-i doesn't work in -primary-file mode");
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IRGenOpts.Triple = llvm::sys::getDefaultTargetTriple();
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IRGenOpts.OutputKind = IRGenOutputKind::Module;
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IRGenOpts.UseJIT = true;
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// FIXME: Debug info is temporarily disabled, because
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// JITCodeEmitter doesn't support it. This can be fixed by
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// migrating to MCJIT.
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IRGenOpts.DebugInfo = false;
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const std::vector<std::string> &ImmediateArgv =
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Invocation.getFrontendOptions().ImmediateArgv;
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const ProcessCmdLine &CmdLine = ImmediateArgv.empty() ?
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ProcessCmdLine(Args.begin(), Args.end()) :
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ProcessCmdLine(ImmediateArgv.begin(),
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ImmediateArgv.end());
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Instance.setSILModule(std::move(SM));
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RunImmediately(Instance, CmdLine, IRGenOpts);
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return false;
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}
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default:
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llvm_unreachable("Unknown ActionType which requires IRGen");
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return true;
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}
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if (PrimarySourceFile) {
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performIRGeneration(IRGenOpts, *PrimarySourceFile, SM.get(),
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Invocation.getFrontendOptions().OutputFilename);
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} else {
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performIRGeneration(IRGenOpts, Instance.getMainModule(), SM.get(),
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Invocation.getFrontendOptions().OutputFilename);
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}
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return false;
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}
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int frontend_main(ArrayRef<const char *>Args,
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const char *Argv0, void *MainAddr) {
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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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CompilerInstance Instance;
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PrintingDiagnosticConsumer PDC;
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Instance.addDiagnosticConsumer(&PDC);
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CompilerInvocation Invocation;
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std::string MainExecutablePath = llvm::sys::fs::getMainExecutable(Argv0,
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MainAddr);
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Invocation.setMainExecutablePath(MainExecutablePath);
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// Parse arguments.
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if (Invocation.parseArgs(Args, Instance.getDiags())) {
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return 1;
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}
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// TODO: reorder, if possible, so that diagnostics emitted during
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// CompilerInvocation::parseArgs are included in the serialized file.
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std::unique_ptr<DiagnosticConsumer> SerializedConsumer;
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{
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const std::string &SerializedDiagnosticsPath =
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Invocation.getFrontendOptions().SerializedDiagnosticsPath;
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if (!SerializedDiagnosticsPath.empty()) {
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std::string ErrorInfo;
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std::unique_ptr<llvm::raw_fd_ostream> OS;
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OS.reset(new llvm::raw_fd_ostream(SerializedDiagnosticsPath.c_str(),
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ErrorInfo,
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llvm::sys::fs::F_Binary));
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if (!ErrorInfo.empty()) {
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Instance.getDiags().diagnose(SourceLoc(),
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diag::cannot_open_serialized_file,
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SerializedDiagnosticsPath, ErrorInfo);
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return 1;
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}
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SerializedConsumer.reset(
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serialized_diagnostics::createConsumer(OS.release()));
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Instance.addDiagnosticConsumer(SerializedConsumer.get());
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}
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}
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if (Invocation.getFrontendOptions().PrintHelp ||
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Invocation.getFrontendOptions().PrintHelpHidden) {
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unsigned IncludedFlagsBitmask = driver::options::FrontendOption;
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unsigned ExcludedFlagsBitmask =
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Invocation.getFrontendOptions().PrintHelpHidden ? 0 :
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llvm::opt::HelpHidden;
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std::unique_ptr<llvm::opt::OptTable> Options(
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driver::createDriverOptTable());
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Options->PrintHelp(llvm::outs(), displayName(MainExecutablePath).c_str(),
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"Swift frontend", IncludedFlagsBitmask,
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ExcludedFlagsBitmask);
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return 0;
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}
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if (Invocation.getFrontendOptions().PrintStats) {
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llvm::EnableStatistics();
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}
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if (Invocation.getDiagnosticOptions().VerifyDiagnostics) {
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enableDiagnosticVerifier(Instance.getSourceMgr());
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}
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if (Instance.setup(Invocation)) {
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return 1;
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}
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bool HadError = performCompile(Instance, Invocation, Args) ||
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Instance.getASTContext().hadError();
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if (Invocation.getDiagnosticOptions().VerifyDiagnostics) {
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HadError = verifyDiagnostics(Instance.getSourceMgr(),
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Instance.getInputBufferIDs());
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}
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return HadError;
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}
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