1 //===- XCoreMachineFunctionInfo.h - XCore 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 XCore-specific per-machine-function information.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_XCORE_XCOREMACHINEFUNCTIONINFO_H
14 #define LLVM_LIB_TARGET_XCORE_XCOREMACHINEFUNCTIONINFO_H
15 
16 #include "llvm/CodeGen/MachineBasicBlock.h"
17 #include "llvm/CodeGen/MachineFrameInfo.h"
18 #include "llvm/CodeGen/MachineFunction.h"
19 #include <cassert>
20 #include <utility>
21 #include <vector>
22 
23 namespace llvm {
24 
25 /// XCoreFunctionInfo - This class is derived from MachineFunction private
26 /// XCore target-specific information for each MachineFunction.
27 class XCoreFunctionInfo : public MachineFunctionInfo {
28   bool LRSpillSlotSet = false;
29   int LRSpillSlot;
30   bool FPSpillSlotSet = false;
31   int FPSpillSlot;
32   bool EHSpillSlotSet = false;
33   int EHSpillSlot[2];
34   unsigned ReturnStackOffset;
35   bool ReturnStackOffsetSet = false;
36   int VarArgsFrameIndex = 0;
37   mutable int CachedEStackSize = -1;
38   std::vector<std::pair<MachineBasicBlock::iterator, CalleeSavedInfo>>
39   SpillLabels;
40 
41   virtual void anchor();
42 
43 public:
44   XCoreFunctionInfo() = default;
45 
46   explicit XCoreFunctionInfo(MachineFunction &MF) {}
47 
48   MachineFunctionInfo *
49   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
50         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
51       const override;
52 
53   ~XCoreFunctionInfo() override = default;
54 
55   void setVarArgsFrameIndex(int off) { VarArgsFrameIndex = off; }
56   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
57 
58   int createLRSpillSlot(MachineFunction &MF);
59   bool hasLRSpillSlot() { return LRSpillSlotSet; }
60   int getLRSpillSlot() const {
61     assert(LRSpillSlotSet && "LR Spill slot not set");
62     return LRSpillSlot;
63   }
64 
65   int createFPSpillSlot(MachineFunction &MF);
66   bool hasFPSpillSlot() { return FPSpillSlotSet; }
67   int getFPSpillSlot() const {
68     assert(FPSpillSlotSet && "FP Spill slot not set");
69     return FPSpillSlot;
70   }
71 
72   const int* createEHSpillSlot(MachineFunction &MF);
73   bool hasEHSpillSlot() { return EHSpillSlotSet; }
74   const int* getEHSpillSlot() const {
75     assert(EHSpillSlotSet && "EH Spill slot not set");
76     return EHSpillSlot;
77   }
78 
79   void setReturnStackOffset(unsigned value) {
80     assert(!ReturnStackOffsetSet && "Return stack offset set twice");
81     ReturnStackOffset = value;
82     ReturnStackOffsetSet = true;
83   }
84 
85   unsigned getReturnStackOffset() const {
86     assert(ReturnStackOffsetSet && "Return stack offset not set");
87     return ReturnStackOffset;
88   }
89 
90   bool isLargeFrame(const MachineFunction &MF) const;
91 
92   std::vector<std::pair<MachineBasicBlock::iterator, CalleeSavedInfo>> &
93   getSpillLabels() {
94     return SpillLabels;
95   }
96 };
97 
98 } // end namespace llvm
99 
100 #endif // LLVM_LIB_TARGET_XCORE_XCOREMACHINEFUNCTIONINFO_H
101