LCOV - code coverage report
Current view: top level - lib/Target/ARM - ARMMachineFunctionInfo.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 31 35 88.6 %
Date: 2017-09-14 15:23:50 Functions: 2 3 66.7 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===-- ARMMachineFunctionInfo.h - ARM 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 ARM-specific per-machine-function information.
      11             : //
      12             : //===----------------------------------------------------------------------===//
      13             : 
      14             : #ifndef LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
      15             : #define LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
      16             : 
      17             : #include "llvm/ADT/DenseMap.h"
      18             : #include "llvm/ADT/SmallPtrSet.h"
      19             : #include "llvm/CodeGen/MachineFunction.h"
      20             : #include "llvm/Support/ErrorHandling.h"
      21             : #include <utility>
      22             : 
      23             : namespace llvm {
      24             : 
      25             : /// ARMFunctionInfo - This class is derived from MachineFunctionInfo and
      26             : /// contains private ARM-specific information for each MachineFunction.
      27       49840 : class ARMFunctionInfo : public MachineFunctionInfo {
      28             :   virtual void anchor();
      29             : 
      30             :   /// isThumb - True if this function is compiled under Thumb mode.
      31             :   /// Used to initialized Align, so must precede it.
      32             :   bool isThumb = false;
      33             : 
      34             :   /// hasThumb2 - True if the target architecture supports Thumb2. Do not use
      35             :   /// to determine if function is compiled under Thumb mode, for that use
      36             :   /// 'isThumb'.
      37             :   bool hasThumb2 = false;
      38             : 
      39             :   /// StByValParamsPadding - For parameter that is split between
      40             :   /// GPRs and memory; while recovering GPRs part, when
      41             :   /// StackAlignment > 4, and GPRs-part-size mod StackAlignment != 0,
      42             :   /// we need to insert gap before parameter start address. It allows to
      43             :   /// "attach" GPR-part to the part that was passed via stack.
      44             :   unsigned StByValParamsPadding = 0;
      45             : 
      46             :   /// VarArgsRegSaveSize - Size of the register save area for vararg functions.
      47             :   ///
      48             :   unsigned ArgRegsSaveSize = 0;
      49             : 
      50             :   /// ReturnRegsCount - Number of registers used up in the return.
      51             :   unsigned ReturnRegsCount = 0;
      52             : 
      53             :   /// HasStackFrame - True if this function has a stack frame. Set by
      54             :   /// determineCalleeSaves().
      55             :   bool HasStackFrame = false;
      56             : 
      57             :   /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
      58             :   /// emitPrologue.
      59             :   bool RestoreSPFromFP = false;
      60             : 
      61             :   /// LRSpilledForFarJump - True if the LR register has been for spilled to
      62             :   /// enable far jump.
      63             :   bool LRSpilledForFarJump = false;
      64             : 
      65             :   /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
      66             :   /// spill stack offset.
      67             :   unsigned FramePtrSpillOffset = 0;
      68             : 
      69             :   /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
      70             :   /// register spills areas. For Mac OS X:
      71             :   ///
      72             :   /// GPR callee-saved (1) : r4, r5, r6, r7, lr
      73             :   /// --------------------------------------------
      74             :   /// GPR callee-saved (2) : r8, r10, r11
      75             :   /// --------------------------------------------
      76             :   /// DPR callee-saved : d8 - d15
      77             :   ///
      78             :   /// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3.
      79             :   /// Some may be spilled after the stack has been realigned.
      80             :   unsigned GPRCS1Offset = 0;
      81             :   unsigned GPRCS2Offset = 0;
      82             :   unsigned DPRCSOffset = 0;
      83             : 
      84             :   /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
      85             :   /// areas.
      86             :   unsigned GPRCS1Size = 0;
      87             :   unsigned GPRCS2Size = 0;
      88             :   unsigned DPRCSAlignGapSize = 0;
      89             :   unsigned DPRCSSize = 0;
      90             : 
      91             :   /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in
      92             :   /// the aligned portion of the stack frame.  This is always a contiguous
      93             :   /// sequence of D-registers starting from d8.
      94             :   ///
      95             :   /// We do not keep track of the frame indices used for these registers - they
      96             :   /// behave like any other frame index in the aligned stack frame.  These
      97             :   /// registers also aren't included in DPRCSSize above.
      98             :   unsigned NumAlignedDPRCS2Regs = 0;
      99             : 
     100             :   unsigned PICLabelUId = 0;
     101             : 
     102             :   /// VarArgsFrameIndex - FrameIndex for start of varargs area.
     103             :   int VarArgsFrameIndex = 0;
     104             : 
     105             :   /// HasITBlocks - True if IT blocks have been inserted.
     106             :   bool HasITBlocks = false;
     107             : 
     108             :   /// CPEClones - Track constant pool entries clones created by Constant Island
     109             :   /// pass.
     110             :   DenseMap<unsigned, unsigned> CPEClones;
     111             : 
     112             :   /// ArgumentStackSize - amount of bytes on stack consumed by the arguments
     113             :   /// being passed on the stack
     114             :   unsigned ArgumentStackSize = 0;
     115             : 
     116             :   /// CoalescedWeights - mapping of basic blocks to the rolling counter of
     117             :   /// coalesced weights.
     118             :   DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights;
     119             : 
     120             :   /// True if this function has a subset of CSRs that is handled explicitly via
     121             :   /// copies.
     122             :   bool IsSplitCSR = false;
     123             : 
     124             :   /// Globals that have had their storage promoted into the constant pool.
     125             :   SmallPtrSet<const GlobalVariable*,2> PromotedGlobals;
     126             : 
     127             :   /// The amount the literal pool has been increasedby due to promoted globals.
     128             :   int PromotedGlobalsIncrease = 0;
     129             :   
     130             : public:
     131             :   ARMFunctionInfo() = default;
     132             : 
     133             :   explicit ARMFunctionInfo(MachineFunction &MF);
     134             : 
     135             :   bool isThumbFunction() const { return isThumb; }
     136       68387 :   bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
     137       73123 :   bool isThumb2Function() const { return isThumb && hasThumb2; }
     138             : 
     139             :   unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; }
     140             :   void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; }
     141             : 
     142             :   unsigned getArgRegsSaveSize() const { return ArgRegsSaveSize; }
     143       22316 :   void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; }
     144             : 
     145             :   unsigned getReturnRegsCount() const { return ReturnRegsCount; }
     146       10819 :   void setReturnRegsCount(unsigned s) { ReturnRegsCount = s; }
     147             : 
     148             :   bool hasStackFrame() const { return HasStackFrame; }
     149        3858 :   void setHasStackFrame(bool s) { HasStackFrame = s; }
     150             : 
     151             :   bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
     152         574 :   void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
     153             : 
     154             :   bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
     155           1 :   void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
     156             : 
     157             :   unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
     158        1069 :   void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
     159             : 
     160             :   unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
     161       12041 :   void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
     162             : 
     163             :   unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
     164             :   unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
     165             :   unsigned getDPRCalleeSavedAreaOffset()  const { return DPRCSOffset; }
     166             : 
     167        3832 :   void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
     168        3832 :   void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
     169        3832 :   void setDPRCalleeSavedAreaOffset(unsigned o)  { DPRCSOffset = o; }
     170             : 
     171             :   unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
     172             :   unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
     173             :   unsigned getDPRCalleeSavedGapSize() const   { return DPRCSAlignGapSize; }
     174             :   unsigned getDPRCalleeSavedAreaSize()  const { return DPRCSSize; }
     175             : 
     176        3832 :   void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
     177        3832 :   void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
     178        3294 :   void setDPRCalleeSavedGapSize(unsigned s)   { DPRCSAlignGapSize = s; }
     179        3832 :   void setDPRCalleeSavedAreaSize(unsigned s)  { DPRCSSize = s; }
     180             : 
     181             :   unsigned getArgumentStackSize() const { return ArgumentStackSize; }
     182       11158 :   void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
     183             : 
     184             :   void initPICLabelUId(unsigned UId) {
     185       11978 :     PICLabelUId = UId;
     186             :   }
     187             : 
     188             :   unsigned getNumPICLabels() const {
     189             :     return PICLabelUId;
     190             :   }
     191             : 
     192             :   unsigned createPICLabelUId() {
     193        1739 :     return PICLabelUId++;
     194             :   }
     195             : 
     196             :   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
     197          30 :   void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
     198             : 
     199             :   bool hasITBlocks() const { return HasITBlocks; }
     200         540 :   void setHasITBlocks(bool h) { HasITBlocks = h; }
     201             : 
     202             :   bool isSplitCSR() const { return IsSplitCSR; }
     203          15 :   void setIsSplitCSR(bool s) { IsSplitCSR = s; }
     204             : 
     205             :   void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
     206        6969 :     if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
     207           0 :       llvm_unreachable("Duplicate entries!");
     208             :   }
     209             : 
     210             :   unsigned getOriginalCPIdx(unsigned CloneIdx) const {
     211           0 :     DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
     212           0 :     if (I != CPEClones.end())
     213           0 :       return I->second;
     214             :     else
     215             :       return -1U;
     216             :   }
     217             : 
     218         317 :   DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight(
     219             :                                                   MachineBasicBlock* MBB) {
     220         317 :     auto It = CoalescedWeights.find(MBB);
     221         951 :     if (It == CoalescedWeights.end()) {
     222         448 :       It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first;
     223             :     }
     224         317 :     return It;
     225             :   }
     226             : 
     227             :   /// Indicate to the backend that \c GV has had its storage changed to inside
     228             :   /// a constant pool. This means it no longer needs to be emitted as a
     229             :   /// global variable.
     230             :   void markGlobalAsPromotedToConstantPool(const GlobalVariable *GV) {
     231          94 :     PromotedGlobals.insert(GV);
     232             :   }
     233             :   SmallPtrSet<const GlobalVariable*, 2>& getGlobalsPromotedToConstantPool() {
     234             :     return PromotedGlobals;
     235             :   }
     236             :   int getPromotedConstpoolIncrease() const {
     237             :     return PromotedGlobalsIncrease;
     238             :   }
     239             :   void setPromotedConstpoolIncrease(int Sz) {
     240          94 :     PromotedGlobalsIncrease = Sz;
     241             :   }
     242             : };
     243             : 
     244             : } // end namespace llvm
     245             : 
     246             : #endif // LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H

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