2003-09-30 18:06:51 +00:00
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//===-- llvm/CodeGen/InstrSelection.h ---------------------------*- C++ -*-===//
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2003-10-20 20:19:47 +00:00
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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2002-08-09 20:08:03 +00:00
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//
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// External interface to instruction selection.
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//
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//===----------------------------------------------------------------------===//
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2001-07-21 12:39:03 +00:00
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#ifndef LLVM_CODEGEN_INSTR_SELECTION_H
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#define LLVM_CODEGEN_INSTR_SELECTION_H
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#include "llvm/Instruction.h"
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2003-06-30 21:59:07 +00:00
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2002-03-23 22:51:58 +00:00
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class Function;
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class InstrForest;
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class MachineInstr;
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class InstructionNode;
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class TargetMachine;
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2003-05-31 07:41:24 +00:00
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class MachineCodeForInstruction;
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class FunctionPass;
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2001-07-21 12:39:03 +00:00
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2002-08-09 20:08:03 +00:00
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//===--------------------- Required Functions ---------------------------------
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// Target-dependent functions that MUST be implemented for each target.
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//
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2001-07-21 12:39:03 +00:00
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2002-03-18 03:20:46 +00:00
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extern void GetInstructionsByRule (InstructionNode* subtreeRoot,
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int ruleForNode,
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short* nts,
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TargetMachine &Target,
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std::vector<MachineInstr*>& mvec);
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extern bool ThisIsAChainRule (int eruleno);
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2001-10-10 20:50:20 +00:00
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//************************ Exported Functions ******************************/
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//---------------------------------------------------------------------------
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// Function: createInstructionSelectionPass
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//
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// Purpose:
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// Entry point for instruction selection using BURG.
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2003-08-21 22:14:26 +00:00
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// Return a pass that performs machine dependent instruction selection.
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//---------------------------------------------------------------------------
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2003-08-14 06:09:32 +00:00
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FunctionPass *createInstructionSelectionPass(TargetMachine &Target);
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2001-10-10 20:50:20 +00:00
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//************************ Exported Data Types *****************************/
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2001-07-21 12:39:03 +00:00
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//---------------------------------------------------------------------------
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// class TmpInstruction
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//
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// This class represents temporary intermediate values
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// used within the machine code for a VM instruction
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//---------------------------------------------------------------------------
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class TmpInstruction : public Instruction {
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TmpInstruction(const TmpInstruction &TI)
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: Instruction(TI.getType(), TI.getOpcode()) {
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if (!TI.Operands.empty()) {
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Operands.push_back(Use(TI.Operands[0], this));
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if (TI.Operands.size() == 2)
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Operands.push_back(Use(TI.Operands[1], this));
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else
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assert(0 && "Bad # operands to TmpInstruction!");
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}
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}
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public:
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// Constructor that uses the type of S1 as the type of the temporary.
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// s1 must be a valid value. s2 may be NULL.
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TmpInstruction(MachineCodeForInstruction& mcfi,
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Value *s1, Value *s2 = 0, const std::string &name = "");
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// Constructor that requires the type of the temporary to be specified.
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// Both S1 and S2 may be NULL.
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TmpInstruction(MachineCodeForInstruction& mcfi,
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const Type *Ty, Value *s1 = 0, Value* s2 = 0,
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const std::string &name = "");
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2003-05-31 07:41:24 +00:00
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virtual Instruction *clone() const {
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assert(0 && "Cannot clone TmpInstructions!");
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return 0;
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}
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virtual const char *getOpcodeName() const {
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2002-03-24 03:56:55 +00:00
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return "TempValueForMachineInstr";
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const TmpInstruction *) { return true; }
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static inline bool classof(const Instruction *I) {
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return (I->getOpcode() == Instruction::UserOp1);
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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2001-11-08 04:50:33 +00:00
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}
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};
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#endif
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