1 //===-- AlphaISelLowering.h - Alpha DAG Lowering Interface ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Andrew Lenharth and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that Alpha uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H
16 #define LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H
18 #include "llvm/ADT/VectorExtras.h"
19 #include "llvm/Target/TargetLowering.h"
20 #include "llvm/CodeGen/SelectionDAG.h"
27 // Start the numbering where the builting ops and target ops leave off.
28 FIRST_NUMBER = ISD::BUILTIN_OP_END+Alpha::INSTRUCTION_LIST_END,
29 //These corrospond to the identical Instruction
30 CVTQT_, CVTQS_, CVTTQ_,
32 /// GPRelHi/GPRelLo - These represent the high and low 16-bit
33 /// parts of a global address respectively.
36 /// RetLit - Literal Relocation of a Global
39 /// GlobalRetAddr - used to restore the return address
42 /// CALL - Normal call.
45 /// DIVCALL - used for special library calls for div and rem
48 /// return flag operand
51 /// CHAIN = COND_BRANCH CHAIN, OPC, (G|F)PRC, DESTBB [, INFLAG] - This
52 /// corresponds to the COND_BRANCH pseudo instruction.
53 /// *PRC is the input register to compare to zero,
54 /// OPC is the branch opcode to use (e.g. Alpha::BEQ),
55 /// DESTBB is the destination block to branch to, and INFLAG is
56 /// an optional input flag argument.
57 COND_BRANCH_I, COND_BRANCH_F
62 class AlphaTargetLowering : public TargetLowering {
63 int VarArgsOffset; // What is the offset to the first vaarg
64 int VarArgsBase; // What is the base FrameIndex
67 AlphaTargetLowering(TargetMachine &TM);
69 /// LowerOperation - Provide custom lowering hooks for some operations.
71 virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
72 virtual SDOperand CustomPromoteOperation(SDOperand Op, SelectionDAG &DAG);
74 //Friendly names for dumps
75 const char *getTargetNodeName(unsigned Opcode) const;
77 /// LowerCallTo - This hook lowers an abstract call to a function into an
79 virtual std::pair<SDOperand, SDOperand>
80 LowerCallTo(SDOperand Chain, const Type *RetTy, bool RetTyIsSigned,
81 bool isVarArg, unsigned CC, bool isTailCall, SDOperand Callee,
82 ArgListTy &Args, SelectionDAG &DAG);
84 ConstraintType getConstraintType(char ConstraintLetter) const;
87 getRegClassForInlineAsmConstraint(const std::string &Constraint,
88 MVT::ValueType VT) const;
90 bool hasITOF() { return useITOF; }
94 #endif // LLVM_TARGET_ALPHA_ALPHAISELLOWERING_H