1 files changed, 68 insertions, 0 deletions
diff --git a/utils/TableGen/InstrInfoEmitter.h b/utils/TableGen/InstrInfoEmitter.h
new file mode 100644
index 0000000000000..870ea0c587809
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+++ b/utils/TableGen/InstrInfoEmitter.h
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+//===- InstrInfoEmitter.h - Generate a Instruction Set Desc. ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend is responsible for emitting a description of the target
+// instruction set for the code generator.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef INSTRINFO_EMITTER_H
+#define INSTRINFO_EMITTER_H
+
+#include "TableGenBackend.h"
+#include "CodeGenDAGPatterns.h"
+#include <vector>
+#include <map>
+
+namespace llvm {
+
+class StringInit;
+class IntInit;
+class ListInit;
+class CodeGenInstruction;
+
+class InstrInfoEmitter : public TableGenBackend {
+  RecordKeeper &Records;
+  CodeGenDAGPatterns CDP;
+  std::map<std::string, unsigned> ItinClassMap;
+  
+public:
+  InstrInfoEmitter(RecordKeeper &R) : Records(R), CDP(R) { }
+
+  // run - Output the instruction set description, returning true on failure.
+  void run(std::ostream &OS);
+
+private:
+  typedef std::map<std::vector<std::string>, unsigned> OperandInfoMapTy;
+  
+  void emitRecord(const CodeGenInstruction &Inst, unsigned Num,
+                  Record *InstrInfo, 
+                  std::map<std::vector<Record*>, unsigned> &EL,
+                  std::map<Record*, unsigned> &BM,
+                  const OperandInfoMapTy &OpInfo,
+                  std::ostream &OS);
+  void emitShiftedValue(Record *R, StringInit *Val, IntInit *Shift,
+                        std::ostream &OS);
+
+  // Itinerary information.
+  void GatherItinClasses();
+  unsigned getItinClassNumber(const Record *InstRec);
+  
+  // Operand information.
+  void EmitOperandInfo(std::ostream &OS, OperandInfoMapTy &OperandInfoIDs);
+  std::vector<std::string> GetOperandInfo(const CodeGenInstruction &Inst);
+
+  void DetectRegisterClassBarriers(std::vector<Record*> &Defs,
+                                   const std::vector<CodeGenRegisterClass> &RCs,
+                                   std::vector<Record*> &Barriers);
+};
+
+} // End llvm namespace
+
+#endif