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95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
//===-- AlphaISelLowering.h - Alpha DAG Lowering Interface ------*- C++ -*-===//
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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 Andrew Lenharth 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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//
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// This file defines the interfaces that Alpha uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H
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#define LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H
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#include "llvm/ADT/VectorExtras.h"
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#include "llvm/Target/TargetLowering.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "Alpha.h"
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namespace llvm {
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namespace AlphaISD {
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enum NodeType {
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// Start the numbering where the builting ops and target ops leave off.
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FIRST_NUMBER = ISD::BUILTIN_OP_END+Alpha::INSTRUCTION_LIST_END,
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//These corrospond to the identical Instruction
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ITOFT_, FTOIT_, CVTQT_, CVTQS_, CVTTQ_,
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/// GPRelHi/GPRelLo - These represent the high and low 16-bit
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/// parts of a global address respectively.
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GPRelHi, GPRelLo,
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/// RetLit - Literal Relocation of a Global
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RelLit,
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/// GlobalRetAddr - used to restore the return address
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GlobalRetAddr,
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/// CALL - Normal call.
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CALL,
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/// DIVCALL - used for special library calls for div and rem
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DivCall,
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/// return flag operand
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RET_FLAG,
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/// CHAIN = COND_BRANCH CHAIN, OPC, (G|F)PRC, DESTBB [, INFLAG] - This
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/// corresponds to the COND_BRANCH pseudo instruction.
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/// *PRC is the input register to compare to zero,
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/// OPC is the branch opcode to use (e.g. Alpha::BEQ),
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/// DESTBB is the destination block to branch to, and INFLAG is
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/// an optional input flag argument.
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COND_BRANCH_I, COND_BRANCH_F
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};
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}
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class AlphaTargetLowering : public TargetLowering {
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int VarArgsOffset; // What is the offset to the first vaarg
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int VarArgsBase; // What is the base FrameIndex
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bool useITOF;
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public:
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AlphaTargetLowering(TargetMachine &TM);
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/// LowerOperation - Provide custom lowering hooks for some operations.
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///
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virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
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virtual SDOperand CustomPromoteOperation(SDOperand Op, SelectionDAG &DAG);
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//Friendly names for dumps
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const char *getTargetNodeName(unsigned Opcode) const;
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/// LowerCallTo - This hook lowers an abstract call to a function into an
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/// actual call.
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virtual std::pair<SDOperand, SDOperand>
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LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC,
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bool isTailCall, SDOperand Callee, ArgListTy &Args,
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SelectionDAG &DAG);
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ConstraintType getConstraintType(char ConstraintLetter) const;
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std::vector<unsigned>
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getRegClassForInlineAsmConstraint(const std::string &Constraint,
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MVT::ValueType VT) const;
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bool hasITOF() { return useITOF; }
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};
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}
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#endif // LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H
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