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 
XCoreFunctionInfo(const Function & F,const TargetSubtargetInfo * STI)46   explicit XCoreFunctionInfo(const Function &F,
47                              const TargetSubtargetInfo *STI) {}
48 
49   MachineFunctionInfo *
50   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
51         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
52       const override;
53 
54   ~XCoreFunctionInfo() override = default;
55 
setVarArgsFrameIndex(int off)56   void setVarArgsFrameIndex(int off) { VarArgsFrameIndex = off; }
getVarArgsFrameIndex()57   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
58 
59   int createLRSpillSlot(MachineFunction &MF);
hasLRSpillSlot()60   bool hasLRSpillSlot() { return LRSpillSlotSet; }
getLRSpillSlot()61   int getLRSpillSlot() const {
62     assert(LRSpillSlotSet && "LR Spill slot not set");
63     return LRSpillSlot;
64   }
65 
66   int createFPSpillSlot(MachineFunction &MF);
hasFPSpillSlot()67   bool hasFPSpillSlot() { return FPSpillSlotSet; }
getFPSpillSlot()68   int getFPSpillSlot() const {
69     assert(FPSpillSlotSet && "FP Spill slot not set");
70     return FPSpillSlot;
71   }
72 
73   const int* createEHSpillSlot(MachineFunction &MF);
hasEHSpillSlot()74   bool hasEHSpillSlot() { return EHSpillSlotSet; }
getEHSpillSlot()75   const int* getEHSpillSlot() const {
76     assert(EHSpillSlotSet && "EH Spill slot not set");
77     return EHSpillSlot;
78   }
79 
setReturnStackOffset(unsigned value)80   void setReturnStackOffset(unsigned value) {
81     assert(!ReturnStackOffsetSet && "Return stack offset set twice");
82     ReturnStackOffset = value;
83     ReturnStackOffsetSet = true;
84   }
85 
getReturnStackOffset()86   unsigned getReturnStackOffset() const {
87     assert(ReturnStackOffsetSet && "Return stack offset not set");
88     return ReturnStackOffset;
89   }
90 
91   bool isLargeFrame(const MachineFunction &MF) const;
92 
93   std::vector<std::pair<MachineBasicBlock::iterator, CalleeSavedInfo>> &
getSpillLabels()94   getSpillLabels() {
95     return SpillLabels;
96   }
97 };
98 
99 } // end namespace llvm
100 
101 #endif // LLVM_LIB_TARGET_XCORE_XCOREMACHINEFUNCTIONINFO_H
102