LLVM  6.0.0svn
ARMCallLowering.h
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1 //===- llvm/lib/Target/ARM/ARMCallLowering.h - Call lowering ----*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 /// \file
11 /// This file describes how to lower LLVM calls to machine code calls.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
16 #define LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
17 
18 #include "llvm/ADT/ArrayRef.h"
20 #include "llvm/IR/CallingConv.h"
21 #include <cstdint>
22 #include <functional>
23 
24 namespace llvm {
25 
26 class ARMTargetLowering;
27 class MachineFunction;
28 class MachineInstrBuilder;
29 class MachineIRBuilder;
30 class Value;
31 
32 class ARMCallLowering : public CallLowering {
33 public:
35 
36  bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
37  unsigned VReg) const override;
38 
39  bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
40  ArrayRef<unsigned> VRegs) const override;
41 
42  bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
43  const MachineOperand &Callee, const ArgInfo &OrigRet,
44  ArrayRef<ArgInfo> OrigArgs) const override;
45 
46 private:
47  bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
48  unsigned VReg, MachineInstrBuilder &Ret) const;
49 
50  using SplitArgTy = std::function<void(unsigned Reg, uint64_t Offset)>;
51 
52  /// Split an argument into one or more arguments that the CC lowering can cope
53  /// with (e.g. replace pointers with integers).
54  void splitToValueTypes(const ArgInfo &OrigArg,
55  SmallVectorImpl<ArgInfo> &SplitArgs,
56  MachineFunction &MF,
57  const SplitArgTy &PerformArgSplit) const;
58 };
59 
60 } // end namespace llvm
61 
62 #endif // LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
static const MCPhysReg VRegs[32]
F(f)
bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val, unsigned VReg) const override
This hook must be implemented to lower outgoing return values, described by Val, into the specified v...
ARMCallLowering(const ARMTargetLowering &TLI)
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: APFloat.h:42
amdgpu Simplify well known AMD library false Value * Callee
bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, ArrayRef< unsigned > VRegs) const override
This hook must be implemented to lower the incoming (formal) arguments, described by Args...
Helper class to build MachineInstr.
MachineOperand class - Representation of each machine instruction operand.
bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv, const MachineOperand &Callee, const ArgInfo &OrigRet, ArrayRef< ArgInfo > OrigArgs) const override
This hook must be implemented to lower the given call instruction, including argument and return valu...
LLVM Value Representation.
Definition: Value.h:73
This file describes how to lower LLVM calls to machine code calls.