| //===-- AlphaISelLowering.h - Alpha DAG Lowering Interface ------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by Andrew Lenharth and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the interfaces that Alpha uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H |
| #define LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H |
| |
| #include "llvm/Target/TargetLowering.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "Alpha.h" |
| |
| namespace llvm { |
| |
| namespace AlphaISD { |
| enum NodeType { |
| // Start the numbering where the builting ops and target ops leave off. |
| FIRST_NUMBER = ISD::BUILTIN_OP_END+Alpha::INSTRUCTION_LIST_END, |
| //These corrospond to the identical Instruction |
| ITOFT_, FTOIT_, CVTQT_, CVTQS_, CVTTQ_, |
| |
| /// GPRelHi/GPRelLo - These represent the high and low 16-bit |
| /// parts of a global address respectively. |
| GPRelHi, GPRelLo, |
| |
| /// RetLit - Literal Relocation of a Global |
| RelLit, |
| |
| /// GlobalBaseReg, used to restore the GOT ptr |
| GlobalBaseReg, |
| |
| }; |
| } |
| |
| class AlphaTargetLowering : public TargetLowering { |
| int VarArgsOffset; // What is the offset to the first vaarg |
| int VarArgsBase; // What is the base FrameIndex |
| unsigned GP; //GOT vreg |
| unsigned RA; //Return Address |
| bool useITOF; |
| public: |
| AlphaTargetLowering(TargetMachine &TM); |
| |
| /// LowerOperation - Provide custom lowering hooks for some operations. |
| /// |
| virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG); |
| |
| /// LowerArguments - This hook must be implemented to indicate how we should |
| /// lower the arguments for the specified function, into the specified DAG. |
| virtual std::vector<SDOperand> |
| LowerArguments(Function &F, SelectionDAG &DAG); |
| |
| /// LowerCallTo - This hook lowers an abstract call to a function into an |
| /// actual call. |
| virtual std::pair<SDOperand, SDOperand> |
| LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC, |
| bool isTailCall, SDOperand Callee, ArgListTy &Args, |
| SelectionDAG &DAG); |
| |
| virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP, |
| Value *VAListV, SelectionDAG &DAG); |
| virtual SDOperand LowerVACopy(SDOperand Chain, SDOperand SrcP, Value *SrcV, |
| SDOperand DestP, Value *DestV, |
| SelectionDAG &DAG); |
| virtual std::pair<SDOperand,SDOperand> |
| LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV, |
| const Type *ArgTy, SelectionDAG &DAG); |
| |
| void restoreGP(MachineBasicBlock* BB); |
| void restoreRA(MachineBasicBlock* BB); |
| unsigned getVRegGP() { return GP; } |
| unsigned getVRegRA() { return RA; } |
| bool hasITOF() { return useITOF; } |
| }; |
| } |
| |
| #endif // LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H |