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      1 //===- XCoreMachineFunctionInfo.h - XCore 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 // This file declares XCore-specific per-machine-function information.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef LLVM_LIB_TARGET_XCORE_XCOREMACHINEFUNCTIONINFO_H
     15 #define LLVM_LIB_TARGET_XCORE_XCOREMACHINEFUNCTIONINFO_H
     16 
     17 #include "llvm/CodeGen/MachineFrameInfo.h"
     18 #include "llvm/CodeGen/MachineFunction.h"
     19 #include <vector>
     20 
     21 namespace llvm {
     22 
     23 // Forward declarations
     24 class Function;
     25 
     26 /// XCoreFunctionInfo - This class is derived from MachineFunction private
     27 /// XCore target-specific information for each MachineFunction.
     28 class XCoreFunctionInfo : public MachineFunctionInfo {
     29   virtual void anchor();
     30   bool LRSpillSlotSet;
     31   int LRSpillSlot;
     32   bool FPSpillSlotSet;
     33   int FPSpillSlot;
     34   bool EHSpillSlotSet;
     35   int EHSpillSlot[2];
     36   unsigned ReturnStackOffset;
     37   bool ReturnStackOffsetSet;
     38   int VarArgsFrameIndex;
     39   mutable int CachedEStackSize;
     40   std::vector<std::pair<MachineBasicBlock::iterator, CalleeSavedInfo>>
     41   SpillLabels;
     42 
     43 public:
     44   XCoreFunctionInfo() :
     45     LRSpillSlotSet(false),
     46     FPSpillSlotSet(false),
     47     EHSpillSlotSet(false),
     48     ReturnStackOffsetSet(false),
     49     VarArgsFrameIndex(0),
     50     CachedEStackSize(-1) {}
     51 
     52   explicit XCoreFunctionInfo(MachineFunction &MF) :
     53     LRSpillSlotSet(false),
     54     FPSpillSlotSet(false),
     55     EHSpillSlotSet(false),
     56     ReturnStackOffsetSet(false),
     57     VarArgsFrameIndex(0),
     58     CachedEStackSize(-1) {}
     59 
     60   ~XCoreFunctionInfo() {}
     61 
     62   void setVarArgsFrameIndex(int off) { VarArgsFrameIndex = off; }
     63   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
     64 
     65   int createLRSpillSlot(MachineFunction &MF);
     66   bool hasLRSpillSlot() { return LRSpillSlotSet; }
     67   int getLRSpillSlot() const {
     68     assert(LRSpillSlotSet && "LR Spill slot not set");
     69     return LRSpillSlot;
     70   }
     71 
     72   int createFPSpillSlot(MachineFunction &MF);
     73   bool hasFPSpillSlot() { return FPSpillSlotSet; }
     74   int getFPSpillSlot() const {
     75     assert(FPSpillSlotSet && "FP Spill slot not set");
     76     return FPSpillSlot;
     77   }
     78 
     79   const int* createEHSpillSlot(MachineFunction &MF);
     80   bool hasEHSpillSlot() { return EHSpillSlotSet; }
     81   const int* getEHSpillSlot() const {
     82     assert(EHSpillSlotSet && "EH Spill slot not set");
     83     return EHSpillSlot;
     84   }
     85 
     86   void setReturnStackOffset(unsigned value) {
     87     assert(!ReturnStackOffsetSet && "Return stack offset set twice");
     88     ReturnStackOffset = value;
     89     ReturnStackOffsetSet = true;
     90   }
     91 
     92   unsigned getReturnStackOffset() const {
     93     assert(ReturnStackOffsetSet && "Return stack offset not set");
     94     return ReturnStackOffset;
     95   }
     96 
     97   bool isLargeFrame(const MachineFunction &MF) const;
     98 
     99   std::vector<std::pair<MachineBasicBlock::iterator, CalleeSavedInfo>> &
    100   getSpillLabels() {
    101     return SpillLabels;
    102   }
    103 };
    104 } // End llvm namespace
    105 
    106 #endif
    107