Eliminate struct TableGenBackend.

TableGen backends are simply written as functions now.

Patch by Sean Silva!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158389 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 7 insertions, 32 deletions

diff --git a/include/llvm/TableGen/TableGenBackend.h b/include/llvm/TableGen/TableGenBackend.h
index 751a7cf750..bedf7fb343 100644
--- a/include/llvm/TableGen/TableGenBackend.h
+++ b/include/llvm/TableGen/TableGenBackend.h
@@ -1,4 +1,4 @@
-//===- llvm/TableGen/TableGenBackend.h - Backend base class -----*- C++ -*-===//
+//===- llvm/TableGen/TableGenBackend.h - Backend utilities ------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,39 +7,21 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// The TableGenBackend class is provided as a common interface for all TableGen
-// backends.  It provides useful services and an standardized interface.
+// Useful utilities for TableGen backends.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_TABLEGEN_TABLEGENBACKEND_H
 #define LLVM_TABLEGEN_TABLEGENBACKEND_H
 
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/StringRef.h"
 
 namespace llvm {
 
-class Record;
-class RecordKeeper;
-
-struct TableGenBackend {
-  virtual void anchor();
-  virtual ~TableGenBackend() {}
-
-  // run - All TableGen backends should implement the run method, which should
-  // be the main entry point.
-  virtual void run(raw_ostream &OS) = 0;
-
-
-public:   // Useful helper routines...
-  /// EmitSourceFileHeader - Output a LLVM style file header to the specified
-  /// ostream.
-  void EmitSourceFileHeader(StringRef Desc, raw_ostream &OS) const;
-
-};
+class raw_ostream;
 
 /// emitSourceFileHeader - Output a LLVM style file header to the specified
-/// ostream.
+/// raw_ostream.
 void emitSourceFileHeader(StringRef Desc, raw_ostream &OS);
 
 } // End llvm namespace
diff --git a/lib/TableGen/TableGenBackend.cpp b/lib/TableGen/TableGenBackend.cpp
index 8117250819..89d3f5e81e 100644
--- a/lib/TableGen/TableGenBackend.cpp
+++ b/lib/TableGen/TableGenBackend.cpp
@@ -1,4 +1,4 @@
-//===- TableGenBackend.cpp - Base class for TableGen Backends ---*- C++ -*-===//
+//===- TableGenBackend.cpp - Utilities for TableGen Backends ----*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -11,17 +11,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/TableGen/TableGenBackend.h"
-#include "llvm/TableGen/Record.h"
 using namespace llvm;
 
-void TableGenBackend::anchor() { }
-
-void TableGenBackend::EmitSourceFileHeader(StringRef Desc,
-                                           raw_ostream &OS) const {
-  emitSourceFileHeader(Desc, OS);
-}
-
 void llvm::emitSourceFileHeader(StringRef Desc, raw_ostream &OS) {
   OS << "//===- TableGen'erated file -------------------------------------*-"
        " C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"