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a170f520a9
A double inclusion will pretty much always be an error in TableGen, so there's no point going on just to die with "def already defined" or whatnot. I'm not too thrilled about the "public: ... private: ..." to expose the DependenciesMapTy, but I really didn't see a better way to keep that type centralized. It's a smell that indicates that some refactoring is needed to make this code more loosely coupled. This should avoid all bugs of the same nature as PR15189. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174582 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
3.8 KiB
C++
128 lines
3.8 KiB
C++
//===- Main.cpp - Top-Level TableGen implementation -----------------------===//
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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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// TableGen is a tool which can be used to build up a description of something,
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// then invoke one or more "tablegen backends" to emit information about the
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// description in some predefined format. In practice, this is used by the LLVM
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// code generators to automate generation of a code generator through a
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// high-level description of the target.
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//
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//===----------------------------------------------------------------------===//
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#include "TGParser.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Support/system_error.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Main.h"
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#include "llvm/TableGen/Record.h"
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#include <algorithm>
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#include <cstdio>
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using namespace llvm;
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namespace {
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cl::opt<std::string>
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OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
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cl::init("-"));
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cl::opt<std::string>
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DependFilename("d",
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cl::desc("Dependency filename"),
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cl::value_desc("filename"),
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cl::init(""));
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cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
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cl::list<std::string>
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IncludeDirs("I", cl::desc("Directory of include files"),
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cl::value_desc("directory"), cl::Prefix);
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}
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/// \brief Create a dependency file for `-d` option.
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///
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/// This functionality is really only for the benefit of the build system.
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/// It is similar to GCC's `-M*` family of options.
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static int createDependencyFile(const TGParser &Parser, const char *argv0) {
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if (OutputFilename == "-") {
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errs() << argv0 << ": the option -d must be used together with -o\n";
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return 1;
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}
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std::string Error;
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tool_output_file DepOut(DependFilename.c_str(), Error);
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if (!Error.empty()) {
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errs() << argv0 << ": error opening " << DependFilename
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<< ":" << Error << "\n";
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return 1;
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}
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DepOut.os() << OutputFilename << ":";
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const TGLexer::DependenciesMapTy &Dependencies = Parser.getDependencies();
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for (TGLexer::DependenciesMapTy::const_iterator I = Dependencies.begin(),
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E = Dependencies.end();
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I != E; ++I) {
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DepOut.os() << " " << I->first;
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}
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DepOut.os() << "\n";
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DepOut.keep();
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return 0;
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}
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namespace llvm {
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int TableGenMain(char *argv0, TableGenMainFn *MainFn) {
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RecordKeeper Records;
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// Parse the input file.
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OwningPtr<MemoryBuffer> File;
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if (error_code ec =
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MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), File)) {
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errs() << "Could not open input file '" << InputFilename << "': "
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<< ec.message() <<"\n";
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return 1;
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}
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MemoryBuffer *F = File.take();
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// Tell SrcMgr about this buffer, which is what TGParser will pick up.
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SrcMgr.AddNewSourceBuffer(F, SMLoc());
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// Record the location of the include directory so that the lexer can find
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// it later.
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SrcMgr.setIncludeDirs(IncludeDirs);
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TGParser Parser(SrcMgr, Records);
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if (Parser.ParseFile())
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return 1;
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std::string Error;
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tool_output_file Out(OutputFilename.c_str(), Error);
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if (!Error.empty()) {
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errs() << argv0 << ": error opening " << OutputFilename
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<< ":" << Error << "\n";
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return 1;
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}
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if (!DependFilename.empty()) {
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if (int Ret = createDependencyFile(Parser, argv0))
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return Ret;
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}
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if (MainFn(Out.os(), Records))
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return 1;
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// Declare success.
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Out.keep();
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return 0;
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return 1;
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}
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}
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