1 //===- MipsCallLowering.h ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// This file describes how to lower LLVM calls to machine code calls.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_MIPS_MIPSCALLLOWERING_H
16 #define LLVM_LIB_TARGET_MIPS_MIPSCALLLOWERING_H
18 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
22 class MipsTargetLowering;
24 class MipsCallLowering : public CallLowering {
29 MipsHandler(MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI)
30 : MIRBuilder(MIRBuilder), MRI(MRI) {}
32 virtual ~MipsHandler() = default;
35 bool assign(const CCValAssign &VA, unsigned vreg);
37 MachineIRBuilder &MIRBuilder;
38 MachineRegisterInfo &MRI;
41 virtual unsigned getStackAddress(uint64_t Size, int64_t Offset,
42 MachinePointerInfo &MPO) = 0;
44 virtual void assignValueToReg(unsigned ValVReg, unsigned PhysReg) = 0;
46 virtual void assignValueToAddress(unsigned ValVReg, unsigned Addr,
48 MachinePointerInfo &MPO) = 0;
51 MipsCallLowering(const MipsTargetLowering &TLI);
53 bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
54 unsigned VReg) const override;
56 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
57 ArrayRef<unsigned> VRegs) const override;
59 bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
60 const MachineOperand &Callee, const ArgInfo &OrigRet,
61 ArrayRef<ArgInfo> OrigArgs) const override;
65 std::function<void(ISD::ArgFlagsTy flags, EVT vt, EVT argvt, bool used,
66 unsigned origIdx, unsigned partOffs)>;
68 /// Based on registers available on target machine split or extend
69 /// type if needed, also change pointer type to appropriate integer
70 /// type. Lambda will fill some info so we can tell MipsCCState to
71 /// assign physical registers.
72 void subTargetRegTypeForCallingConv(MachineIRBuilder &MIRBuilder,
73 ArrayRef<ArgInfo> Args,
74 ArrayRef<unsigned> OrigArgIndices,
75 const FunTy &PushBack) const;
77 /// Split structures and arrays, save original argument indices since
78 /// Mips calling conv needs info about original argument type.
79 void splitToValueTypes(const ArgInfo &OrigArg, unsigned OriginalIndex,
80 SmallVectorImpl<ArgInfo> &SplitArgs,
81 SmallVectorImpl<unsigned> &SplitArgsOrigIndices) const;
84 } // end namespace llvm
86 #endif // LLVM_LIB_TARGET_MIPS_MIPSCALLLOWERING_H