1 //=- RISCVMachineFunctionInfo.h - RISCV machine function info -----*- C++ -*-=//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file declares RISCV-specific per-machine-function information.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_RISCV_RISCVMACHINEFUNCTIONINFO_H
14 #define LLVM_LIB_TARGET_RISCV_RISCVMACHINEFUNCTIONINFO_H
15 
16 #include "llvm/CodeGen/MachineFrameInfo.h"
17 #include "llvm/CodeGen/MachineFunction.h"
18 
19 namespace llvm {
20 
21 /// RISCVMachineFunctionInfo - This class is derived from MachineFunctionInfo
22 /// and contains private RISCV-specific information for each MachineFunction.
23 class RISCVMachineFunctionInfo : public MachineFunctionInfo {
24 private:
25   MachineFunction &MF;
26   /// FrameIndex for start of varargs area
27   int VarArgsFrameIndex = 0;
28   /// Size of the save area used for varargs
29   int VarArgsSaveSize = 0;
30   /// FrameIndex used for transferring values between 64-bit FPRs and a pair
31   /// of 32-bit GPRs via the stack.
32   int MoveF64FrameIndex = -1;
33 
34 public:
35   RISCVMachineFunctionInfo(MachineFunction &MF) : MF(MF) {}
36 
37   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
38   void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
39 
40   unsigned getVarArgsSaveSize() const { return VarArgsSaveSize; }
41   void setVarArgsSaveSize(int Size) { VarArgsSaveSize = Size; }
42 
43   int getMoveF64FrameIndex() {
44     if (MoveF64FrameIndex == -1)
45       MoveF64FrameIndex = MF.getFrameInfo().CreateStackObject(8, 8, false);
46     return MoveF64FrameIndex;
47   }
48 };
49 
50 } // end namespace llvm
51 
52 #endif // LLVM_LIB_TARGET_RISCV_RISCVMACHINEFUNCTIONINFO_H
53