1 //==- SystemZMachineFuctionInfo.h - SystemZ machine function info -*- 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 #ifndef SYSTEMZMACHINEFUNCTIONINFO_H
11 #define SYSTEMZMACHINEFUNCTIONINFO_H
12 
13 #include "llvm/CodeGen/MachineFunction.h"
14 
15 namespace llvm {
16 
17 class SystemZMachineFunctionInfo : public MachineFunctionInfo {
18   unsigned LowSavedGPR;
19   unsigned HighSavedGPR;
20   unsigned VarArgsFirstGPR;
21   unsigned VarArgsFirstFPR;
22   unsigned VarArgsFrameIndex;
23   unsigned RegSaveFrameIndex;
24   bool ManipulatesSP;
25 
26   virtual void anchor();
27 
28 public:
29   explicit SystemZMachineFunctionInfo(MachineFunction &MF)
30     : LowSavedGPR(0), HighSavedGPR(0), VarArgsFirstGPR(0), VarArgsFirstFPR(0),
31       VarArgsFrameIndex(0), RegSaveFrameIndex(0), ManipulatesSP(false) {}
32 
33   // Get and set the first call-saved GPR that should be saved and restored
34   // by this function.  This is 0 if no GPRs need to be saved or restored.
35   unsigned getLowSavedGPR() const { return LowSavedGPR; }
36   void setLowSavedGPR(unsigned Reg) { LowSavedGPR = Reg; }
37 
38   // Get and set the last call-saved GPR that should be saved and restored
39   // by this function.
40   unsigned getHighSavedGPR() const { return HighSavedGPR; }
41   void setHighSavedGPR(unsigned Reg) { HighSavedGPR = Reg; }
42 
43   // Get and set the number of fixed (as opposed to variable) arguments
44   // that are passed in GPRs to this function.
45   unsigned getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
46   void setVarArgsFirstGPR(unsigned GPR) { VarArgsFirstGPR = GPR; }
47 
48   // Likewise FPRs.
49   unsigned getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
50   void setVarArgsFirstFPR(unsigned FPR) { VarArgsFirstFPR = FPR; }
51 
52   // Get and set the frame index of the first stack vararg.
53   unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
54   void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
55 
56   // Get and set the frame index of the register save area
57   // (i.e. the incoming stack pointer).
58   unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
59   void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
60 
61   // Get and set whether the function directly manipulates the stack pointer,
62   // e.g. through STACKSAVE or STACKRESTORE.
63   bool getManipulatesSP() const { return ManipulatesSP; }
64   void setManipulatesSP(bool MSP) { ManipulatesSP = MSP; }
65 };
66 
67 } // end llvm namespace
68 
69 #endif
70