forked from OSchip/llvm-project
149 lines
4.9 KiB
C++
149 lines
4.9 KiB
C++
//===-- MBlazeISelLowering.h - MBlaze 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 is distributed under the University of Illinois Open Source
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// 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 MBlaze 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 MBlazeISELLOWERING_H
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#define MBlazeISELLOWERING_H
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/Target/TargetLowering.h"
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#include "MBlaze.h"
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#include "MBlazeSubtarget.h"
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namespace llvm {
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namespace MBlazeCC {
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enum CC {
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FIRST = 0,
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EQ,
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NE,
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GT,
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LT,
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GE,
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LE
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};
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}
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namespace MBlazeISD {
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enum NodeType {
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// Start the numbering from where ISD NodeType finishes.
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FIRST_NUMBER = ISD::BUILTIN_OP_END,
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// Jump and link (call)
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JmpLink,
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// Handle gp_rel (small data/bss sections) relocation.
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GPRel,
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// Select CC Pseudo Instruction
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Select_CC,
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// Wrap up multiple types of instructions
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Wrap,
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// Integer Compare
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ICmp,
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// Return
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Ret
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};
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}
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//===--------------------------------------------------------------------===//
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// TargetLowering Implementation
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//===--------------------------------------------------------------------===//
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class MBlazeTargetLowering : public TargetLowering {
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public:
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explicit MBlazeTargetLowering(MBlazeTargetMachine &TM);
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/// LowerOperation - Provide custom lowering hooks for some operations.
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virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
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/// getTargetNodeName - This method returns the name of a target specific
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// DAG node.
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virtual const char *getTargetNodeName(unsigned Opcode) const;
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/// getSetCCResultType - get the ISD::SETCC result ValueType
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MVT::SimpleValueType getSetCCResultType(EVT VT) const;
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virtual unsigned getFunctionAlignment(const Function *F) const;
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private:
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// Subtarget Info
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const MBlazeSubtarget *Subtarget;
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// Lower Operand helpers
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SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
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CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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DebugLoc dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const;
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// Lower Operand specifics
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SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
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virtual SDValue
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LowerFormalArguments(SDValue Chain,
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CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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DebugLoc dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const;
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virtual SDValue
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LowerCall(SDValue Chain, SDValue Callee,
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CallingConv::ID CallConv, bool isVarArg,
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bool &isTailCall,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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DebugLoc dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const;
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virtual SDValue
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LowerReturn(SDValue Chain,
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CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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DebugLoc dl, SelectionDAG &DAG) const;
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virtual MachineBasicBlock *
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EmitInstrWithCustomInserter(MachineInstr *MI,
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MachineBasicBlock *MBB) const;
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// Inline asm support
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ConstraintType getConstraintType(const std::string &Constraint) const;
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std::pair<unsigned, const TargetRegisterClass*>
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getRegForInlineAsmConstraint(const std::string &Constraint,
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EVT VT) const;
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std::vector<unsigned>
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getRegClassForInlineAsmConstraint(const std::string &Constraint,
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EVT VT) const;
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virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
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/// isFPImmLegal - Returns true if the target can instruction select the
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/// specified FP immediate natively. If false, the legalizer will
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/// materialize the FP immediate as a load from a constant pool.
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virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
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};
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}
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#endif // MBlazeISELLOWERING_H
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