1 files changed, 111 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/TargetMachine.h b/include/llvm/CodeGen/TargetMachine.h
new file mode 100644
index 0000000000..72545f88e9
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+++ b/include/llvm/CodeGen/TargetMachine.h
@@ -0,0 +1,111 @@
+// $Id$ -*-c++-*-
+//***************************************************************************
+// File:
+//	TargetMachine.h
+// 
+// Purpose:
+//	
+// History:
+//	7/12/01	 -  Vikram Adve  -  Created
+//**************************************************************************/
+
+#ifndef LLVM_CODEGEN_TARGETMACHINE_H
+#define LLVM_CODEGEN_TARGETMACHINE_H
+
+//************************** System Include Files **************************/
+
+//*************************** User Include Files ***************************/
+
+#include "llvm/Support/Unique.h"
+#include "llvm/Tools/DataTypes.h"
+
+//************************* Opaque Declarations ****************************/
+
+class Type;
+class StructType;
+class MachineInstrInfo;
+
+
+//************************ Exported Data Types *****************************/
+
+
+//---------------------------------------------------------------------------
+// Data types used to define information about a single machine instruction
+//---------------------------------------------------------------------------
+
+typedef int MachineOpCode;
+typedef int OpCodeMask;
+
+
+// struct MachineInstrInfo:
+//	Predefined information about each machine instruction.
+// 
+struct MachineInstrInfo {
+  string	opCodeString;	// Assembly language mnemonic for the opcode.
+  unsigned int	numOperands;	// Number of arguments for the instruction.
+  int		resultPos;	// Position of the result; -1 if no result
+  unsigned int	maxImmedConst;	// Largest +ve constant in IMMMED field or 0.
+  bool    immedIsSignExtended;	// Is the IMMED field sign-extended? If so,
+				//   smallest -ve value is -(maxImmedConst+1).
+  
+  
+  // Check if the specified constant fits in the immediate field
+  // of this machine instruction
+  // 
+  bool	constantFitsInImmedField	(int64_t intValue) const;
+  
+  // Return the largest +ve constant that can be held in the IMMMED field
+  // of this machine instruction.
+  // isSignExtended is set to true if the value is sign-extended before use
+  // (this is true for all immediate fields in SPARC instructions).
+  // Return 0 if the instruction has no IMMED field.
+  // 
+  inline uint64_t	maxImmedConstant(bool& isSignExtended) const {
+				isSignExtended = immedIsSignExtended;
+				return maxImmedConst; }
+};
+
+// Global variable holding an array of the above structures.
+// This needs to be defined separately for each target machine.
+// 
+extern const MachineInstrInfo* TargetMachineInstrInfo;
+
+
+//---------------------------------------------------------------------------
+// class TargetMachine
+// 
+// Purpose:
+//   Machine description.
+// 
+//---------------------------------------------------------------------------
+
+class TargetMachine: public Unique {
+public:
+  int		optSizeForSubWordData;
+  int		intSize;
+  int		longSize;
+  int		floatSize;
+  int		doubleSize;
+  int		longDoubleSize;
+  int		pointerSize;
+  int		minMemOpWordSize;
+  int		maxAtomicMemOpWordSize;
+  
+  // Description of machine instructions (array indexed by machine opcode)
+  const MachineInstrInfo* machineInstrInfo;
+  
+  // Register information.  This needs to be reorganized into a single class.
+  int		zeroRegNum;	// register that gives 0 if any (-1 if none)
+  
+public:
+  /*ctor*/		TargetMachine		() {}
+  /*dtor*/ virtual	~TargetMachine		() {}
+  
+  virtual unsigned int	findOptimalStorageSize	(const Type* ty) const;
+  
+  virtual unsigned int*	findOptimalMemberOffsets(const StructType* stype)const;
+};
+
+//**************************************************************************/
+
+#endif