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c4155d591b
The MicroBlaze backend was generating stack layouts that did not conform correctly to the ABI. This update generates stack layouts which are closer to what GCC does. Variable arguments support was added as well but the stack layout for varargs has not been finalized. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97807 91177308-0d34-0410-b5e6-96231b3b80d8
150 lines
4.9 KiB
C++
150 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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int VarArgsFrameIndex; // FrameIndex for start of varargs area.
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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);
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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);
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// Lower Operand specifics
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SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG);
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SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
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SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG);
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SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG);
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SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
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SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG);
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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);
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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<ISD::InputArg> &Ins,
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DebugLoc dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals);
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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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DebugLoc dl, SelectionDAG &DAG);
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virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
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MachineBasicBlock *MBB,
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DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) 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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