xref: /freebsd/contrib/llvm-project/llvm/lib/Target/SystemZ/SystemZMachineFunctionInfo.h (revision 32100375a661c1e16588ddfa7b90ca8d26cb9786)
1 //=== SystemZMachineFunctionInfo.h - SystemZ 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 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
10 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
11 
12 #include "llvm/CodeGen/MachineFunction.h"
13 
14 namespace llvm {
15 
16 namespace SystemZ {
17 // A struct to hold the low and high GPR registers to be saved/restored as
18 // well as the offset into the register save area of the low register.
19 struct GPRRegs {
20   unsigned LowGPR;
21   unsigned HighGPR;
22   unsigned GPROffset;
23   GPRRegs() : LowGPR(0), HighGPR(0), GPROffset(0) {}
24   };
25 }
26 
27 class SystemZMachineFunctionInfo : public MachineFunctionInfo {
28   virtual void anchor();
29 
30   SystemZ::GPRRegs SpillGPRRegs;
31   SystemZ::GPRRegs RestoreGPRRegs;
32   unsigned VarArgsFirstGPR;
33   unsigned VarArgsFirstFPR;
34   unsigned VarArgsFrameIndex;
35   unsigned RegSaveFrameIndex;
36   int FramePointerSaveIndex;
37   bool ManipulatesSP;
38   unsigned NumLocalDynamics;
39 
40 public:
41   explicit SystemZMachineFunctionInfo(MachineFunction &MF)
42     : VarArgsFirstGPR(0), VarArgsFirstFPR(0), VarArgsFrameIndex(0),
43       RegSaveFrameIndex(0), FramePointerSaveIndex(0), ManipulatesSP(false),
44       NumLocalDynamics(0) {}
45 
46   // Get and set the first and last call-saved GPR that should be saved by
47   // this function and the SP offset for the STMG.  These are 0 if no GPRs
48   // need to be saved or restored.
49   SystemZ::GPRRegs getSpillGPRRegs() const { return SpillGPRRegs; }
50   void setSpillGPRRegs(unsigned Low, unsigned High, unsigned Offs) {
51     SpillGPRRegs.LowGPR = Low;
52     SpillGPRRegs.HighGPR = High;
53     SpillGPRRegs.GPROffset = Offs;
54   }
55 
56   // Get and set the first and last call-saved GPR that should be restored by
57   // this function and the SP offset for the LMG.  These are 0 if no GPRs
58   // need to be saved or restored.
59   SystemZ::GPRRegs getRestoreGPRRegs() const { return RestoreGPRRegs; }
60   void setRestoreGPRRegs(unsigned Low, unsigned High, unsigned Offs) {
61     RestoreGPRRegs.LowGPR = Low;
62     RestoreGPRRegs.HighGPR = High;
63     RestoreGPRRegs.GPROffset = Offs;
64   }
65 
66   // Get and set the number of fixed (as opposed to variable) arguments
67   // that are passed in GPRs to this function.
68   unsigned getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
69   void setVarArgsFirstGPR(unsigned GPR) { VarArgsFirstGPR = GPR; }
70 
71   // Likewise FPRs.
72   unsigned getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
73   void setVarArgsFirstFPR(unsigned FPR) { VarArgsFirstFPR = FPR; }
74 
75   // Get and set the frame index of the first stack vararg.
76   unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
77   void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
78 
79   // Get and set the frame index of the register save area
80   // (i.e. the incoming stack pointer).
81   unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
82   void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
83 
84   // Get and set the frame index of where the old frame pointer is stored.
85   int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
86   void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
87 
88   // Get and set whether the function directly manipulates the stack pointer,
89   // e.g. through STACKSAVE or STACKRESTORE.
90   bool getManipulatesSP() const { return ManipulatesSP; }
91   void setManipulatesSP(bool MSP) { ManipulatesSP = MSP; }
92 
93   // Count number of local-dynamic TLS symbols used.
94   unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
95   void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
96 };
97 
98 } // end namespace llvm
99 
100 #endif
101