1 files changed, 120 insertions, 0 deletions
diff --git a/contrib/llvm/lib/TableGen/Main.cpp b/contrib/llvm/lib/TableGen/Main.cpp
new file mode 100644
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+++ b/contrib/llvm/lib/TableGen/Main.cpp
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+//===- Main.cpp - Top-Level TableGen implementation -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// TableGen is a tool which can be used to build up a description of something,
+// then invoke one or more "tablegen backends" to emit information about the
+// description in some predefined format.  In practice, this is used by the LLVM
+// code generators to automate generation of a code generator through a
+// high-level description of the target.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/TableGen/Main.h"
+#include "TGParser.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/TableGen/Error.h"
+#include "llvm/TableGen/Record.h"
+#include <algorithm>
+#include <cstdio>
+#include <system_error>
+using namespace llvm;
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"),
+               cl::init("-"));
+
+static cl::opt<std::string>
+DependFilename("d",
+               cl::desc("Dependency filename"),
+               cl::value_desc("filename"),
+               cl::init(""));
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
+
+static cl::list<std::string>
+IncludeDirs("I", cl::desc("Directory of include files"),
+            cl::value_desc("directory"), cl::Prefix);
+
+/// \brief Create a dependency file for `-d` option.
+///
+/// This functionality is really only for the benefit of the build system.
+/// It is similar to GCC's `-M*` family of options.
+static int createDependencyFile(const TGParser &Parser, const char *argv0) {
+  if (OutputFilename == "-") {
+    errs() << argv0 << ": the option -d must be used together with -o\n";
+    return 1;
+  }
+  std::error_code EC;
+  tool_output_file DepOut(DependFilename, EC, sys::fs::F_Text);
+  if (EC) {
+    errs() << argv0 << ": error opening " << DependFilename << ":"
+           << EC.message() << "\n";
+    return 1;
+  }
+  DepOut.os() << OutputFilename << ":";
+  for (const auto &Dep : Parser.getDependencies()) {
+    DepOut.os() << ' ' << Dep.first;
+  }
+  DepOut.os() << "\n";
+  DepOut.keep();
+  return 0;
+}
+
+int llvm::TableGenMain(char *argv0, TableGenMainFn *MainFn) {
+  RecordKeeper Records;
+
+  // Parse the input file.
+  ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
+      MemoryBuffer::getFileOrSTDIN(InputFilename);
+  if (std::error_code EC = FileOrErr.getError()) {
+    errs() << "Could not open input file '" << InputFilename
+           << "': " << EC.message() << "\n";
+    return 1;
+  }
+
+  // Tell SrcMgr about this buffer, which is what TGParser will pick up.
+  SrcMgr.AddNewSourceBuffer(std::move(*FileOrErr), SMLoc());
+
+  // Record the location of the include directory so that the lexer can find
+  // it later.
+  SrcMgr.setIncludeDirs(IncludeDirs);
+
+  TGParser Parser(SrcMgr, Records);
+
+  if (Parser.ParseFile())
+    return 1;
+
+  std::error_code EC;
+  tool_output_file Out(OutputFilename, EC, sys::fs::F_Text);
+  if (EC) {
+    errs() << argv0 << ": error opening " << OutputFilename << ":"
+           << EC.message() << "\n";
+    return 1;
+  }
+  if (!DependFilename.empty()) {
+    if (int Ret = createDependencyFile(Parser, argv0))
+      return Ret;
+  }
+
+  if (MainFn(Out.os(), Records))
+    return 1;
+
+  if (ErrorsPrinted > 0) {
+    errs() << argv0 << ": " << ErrorsPrinted << " errors.\n";
+    return 1;
+  }
+
+  // Declare success.
+  Out.keep();
+  return 0;
+}