1 //===-- llvm/lib/Target/ARM/ARMCallLowering.h - Call lowering -------------===//
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_ARM_ARMCALLLOWERING
16 #define LLVM_LIB_TARGET_ARM_ARMCALLLOWERING
18 #include "llvm/CodeGen/CallingConvLower.h"
19 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
20 #include "llvm/CodeGen/ValueTypes.h"
24 class ARMTargetLowering;
25 class MachineInstrBuilder;
27 class ARMCallLowering : public CallLowering {
29 ARMCallLowering(const ARMTargetLowering &TLI);
31 bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
32 unsigned VReg) const override;
34 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
35 ArrayRef<unsigned> VRegs) const override;
37 bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
38 const MachineOperand &Callee, const ArgInfo &OrigRet,
39 ArrayRef<ArgInfo> OrigArgs) const override;
42 bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
43 unsigned VReg, MachineInstrBuilder &Ret) const;
45 typedef std::function<void(unsigned Reg, uint64_t Offset)> SplitArgTy;
47 /// Split an argument into one or more arguments that the CC lowering can cope
48 /// with (e.g. replace pointers with integers).
49 void splitToValueTypes(const ArgInfo &OrigArg,
50 SmallVectorImpl<ArgInfo> &SplitArgs,
52 const SplitArgTy &PerformArgSplit) const;
54 } // End of namespace llvm