LLVM  8.0.0svn
MachineFunction.h
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1 //===- llvm/CodeGen/MachineFunction.h ---------------------------*- 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 // Collect native machine code for a function. This class contains a list of
11 // MachineBasicBlock instances that make up the current compiled function.
12 //
13 // This class also contains pointers to various classes which hold
14 // target-specific information about the generated code.
15 //
16 //===----------------------------------------------------------------------===//
17 
18 #ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
19 #define LLVM_CODEGEN_MACHINEFUNCTION_H
20 
21 #include "llvm/ADT/ArrayRef.h"
22 #include "llvm/ADT/BitVector.h"
23 #include "llvm/ADT/DenseMap.h"
24 #include "llvm/ADT/GraphTraits.h"
25 #include "llvm/ADT/Optional.h"
26 #include "llvm/ADT/SmallVector.h"
27 #include "llvm/ADT/StringRef.h"
28 #include "llvm/ADT/ilist.h"
29 #include "llvm/ADT/iterator.h"
34 #include "llvm/IR/DebugLoc.h"
35 #include "llvm/IR/Instructions.h"
36 #include "llvm/IR/Metadata.h"
37 #include "llvm/MC/MCDwarf.h"
38 #include "llvm/MC/MCSymbol.h"
39 #include "llvm/Support/Allocator.h"
42 #include "llvm/Support/Compiler.h"
44 #include "llvm/Support/Recycler.h"
45 #include <cassert>
46 #include <cstdint>
47 #include <memory>
48 #include <utility>
49 #include <vector>
50 
51 namespace llvm {
52 
53 class BasicBlock;
54 class BlockAddress;
55 class DataLayout;
56 class DIExpression;
57 class DILocalVariable;
58 class DILocation;
59 class Function;
60 class GlobalValue;
61 class LLVMTargetMachine;
62 class MachineConstantPool;
63 class MachineFrameInfo;
64 class MachineFunction;
65 class MachineJumpTableInfo;
66 class MachineModuleInfo;
67 class MachineRegisterInfo;
68 class MCContext;
69 class MCInstrDesc;
70 class Pass;
71 class PseudoSourceValueManager;
72 class raw_ostream;
73 class SlotIndexes;
74 class TargetRegisterClass;
75 class TargetSubtargetInfo;
76 struct WasmEHFuncInfo;
77 struct WinEHFuncInfo;
78 
80  void deleteNode(MachineBasicBlock *MBB);
81 };
82 
84  void addNodeToList(MachineBasicBlock* N);
85  void removeNodeFromList(MachineBasicBlock* N);
86 
87  template <class Iterator>
88  void transferNodesFromList(ilist_callback_traits &OldList, Iterator, Iterator) {
89  llvm_unreachable("Never transfer between lists");
90  }
91 };
92 
93 /// MachineFunctionInfo - This class can be derived from and used by targets to
94 /// hold private target-specific information for each MachineFunction. Objects
95 /// of type are accessed/created with MF::getInfo and destroyed when the
96 /// MachineFunction is destroyed.
98  virtual ~MachineFunctionInfo();
99 
100  /// Factory function: default behavior is to call new using the
101  /// supplied allocator.
102  ///
103  /// This function can be overridden in a derive class.
104  template<typename Ty>
106  return new (Allocator.Allocate<Ty>()) Ty(MF);
107  }
108 };
109 
110 /// Properties which a MachineFunction may have at a given point in time.
111 /// Each of these has checking code in the MachineVerifier, and passes can
112 /// require that a property be set.
114  // Possible TODO: Allow targets to extend this (perhaps by allowing the
115  // constructor to specify the size of the bit vector)
116  // Possible TODO: Allow requiring the negative (e.g. VRegsAllocated could be
117  // stated as the negative of "has vregs"
118 
119 public:
120  // The properties are stated in "positive" form; i.e. a pass could require
121  // that the property hold, but not that it does not hold.
122 
123  // Property descriptions:
124  // IsSSA: True when the machine function is in SSA form and virtual registers
125  // have a single def.
126  // NoPHIs: The machine function does not contain any PHI instruction.
127  // TracksLiveness: True when tracking register liveness accurately.
128  // While this property is set, register liveness information in basic block
129  // live-in lists and machine instruction operands (e.g. kill flags, implicit
130  // defs) is accurate. This means it can be used to change the code in ways
131  // that affect the values in registers, for example by the register
132  // scavenger.
133  // When this property is clear, liveness is no longer reliable.
134  // NoVRegs: The machine function does not use any virtual registers.
135  // Legalized: In GlobalISel: the MachineLegalizer ran and all pre-isel generic
136  // instructions have been legalized; i.e., all instructions are now one of:
137  // - generic and always legal (e.g., COPY)
138  // - target-specific
139  // - legal pre-isel generic instructions.
140  // RegBankSelected: In GlobalISel: the RegBankSelect pass ran and all generic
141  // virtual registers have been assigned to a register bank.
142  // Selected: In GlobalISel: the InstructionSelect pass ran and all pre-isel
143  // generic instructions have been eliminated; i.e., all instructions are now
144  // target-specific or non-pre-isel generic instructions (e.g., COPY).
145  // Since only pre-isel generic instructions can have generic virtual register
146  // operands, this also means that all generic virtual registers have been
147  // constrained to virtual registers (assigned to register classes) and that
148  // all sizes attached to them have been eliminated.
149  enum class Property : unsigned {
150  IsSSA,
151  NoPHIs,
152  TracksLiveness,
153  NoVRegs,
154  FailedISel,
155  Legalized,
156  RegBankSelected,
157  Selected,
158  LastProperty = Selected,
159  };
160 
161  bool hasProperty(Property P) const {
162  return Properties[static_cast<unsigned>(P)];
163  }
164 
166  Properties.set(static_cast<unsigned>(P));
167  return *this;
168  }
169 
171  Properties.reset(static_cast<unsigned>(P));
172  return *this;
173  }
174 
175  /// Reset all the properties.
177  Properties.reset();
178  return *this;
179  }
180 
182  Properties |= MFP.Properties;
183  return *this;
184  }
185 
187  Properties.reset(MFP.Properties);
188  return *this;
189  }
190 
191  // Returns true if all properties set in V (i.e. required by a pass) are set
192  // in this.
194  return !V.Properties.test(Properties);
195  }
196 
197  /// Print the MachineFunctionProperties in human-readable form.
198  void print(raw_ostream &OS) const;
199 
200 private:
201  BitVector Properties =
202  BitVector(static_cast<unsigned>(Property::LastProperty)+1);
203 };
204 
205 struct SEHHandler {
206  /// Filter or finally function. Null indicates a catch-all.
208 
209  /// Address of block to recover at. Null for a finally handler.
211 };
212 
213 /// This structure is used to retain landing pad info for the current function.
215  MachineBasicBlock *LandingPadBlock; // Landing pad block.
216  SmallVector<MCSymbol *, 1> BeginLabels; // Labels prior to invoke.
217  SmallVector<MCSymbol *, 1> EndLabels; // Labels after invoke.
218  SmallVector<SEHHandler, 1> SEHHandlers; // SEH handlers active at this lpad.
219  MCSymbol *LandingPadLabel = nullptr; // Label at beginning of landing pad.
220  std::vector<int> TypeIds; // List of type ids (filters negative).
221 
223  : LandingPadBlock(MBB) {}
224 };
225 
227  const Function &F;
228  const LLVMTargetMachine &Target;
229  const TargetSubtargetInfo *STI;
230  MCContext &Ctx;
231  MachineModuleInfo &MMI;
232 
233  // RegInfo - Information about each register in use in the function.
234  MachineRegisterInfo *RegInfo;
235 
236  // Used to keep track of target-specific per-machine function information for
237  // the target implementation.
238  MachineFunctionInfo *MFInfo;
239 
240  // Keep track of objects allocated on the stack.
241  MachineFrameInfo *FrameInfo;
242 
243  // Keep track of constants which are spilled to memory
245 
246  // Keep track of jump tables for switch instructions
247  MachineJumpTableInfo *JumpTableInfo;
248 
249  // Keeps track of Wasm exception handling related data. This will be null for
250  // functions that aren't using a wasm EH personality.
251  WasmEHFuncInfo *WasmEHInfo = nullptr;
252 
253  // Keeps track of Windows exception handling related data. This will be null
254  // for functions that aren't using a funclet-based EH personality.
255  WinEHFuncInfo *WinEHInfo = nullptr;
256 
257  // Function-level unique numbering for MachineBasicBlocks. When a
258  // MachineBasicBlock is inserted into a MachineFunction is it automatically
259  // numbered and this vector keeps track of the mapping from ID's to MBB's.
260  std::vector<MachineBasicBlock*> MBBNumbering;
261 
262  // Pool-allocate MachineFunction-lifetime and IR objects.
264 
265  // Allocation management for instructions in function.
266  Recycler<MachineInstr> InstructionRecycler;
267 
268  // Allocation management for operand arrays on instructions.
269  ArrayRecycler<MachineOperand> OperandRecycler;
270 
271  // Allocation management for basic blocks in function.
272  Recycler<MachineBasicBlock> BasicBlockRecycler;
273 
274  // List of machine basic blocks in function
276  BasicBlockListType BasicBlocks;
277 
278  /// FunctionNumber - This provides a unique ID for each function emitted in
279  /// this translation unit.
280  ///
281  unsigned FunctionNumber;
282 
283  /// Alignment - The alignment of the function.
284  unsigned Alignment;
285 
286  /// ExposesReturnsTwice - True if the function calls setjmp or related
287  /// functions with attribute "returns twice", but doesn't have
288  /// the attribute itself.
289  /// This is used to limit optimizations which cannot reason
290  /// about the control flow of such functions.
291  bool ExposesReturnsTwice = false;
292 
293  /// True if the function includes any inline assembly.
294  bool HasInlineAsm = false;
295 
296  /// True if any WinCFI instruction have been emitted in this function.
297  bool HasWinCFI = false;
298 
299  /// Current high-level properties of the IR of the function (e.g. is in SSA
300  /// form or whether registers have been allocated)
301  MachineFunctionProperties Properties;
302 
303  // Allocation management for pseudo source values.
304  std::unique_ptr<PseudoSourceValueManager> PSVManager;
305 
306  /// List of moves done by a function's prolog. Used to construct frame maps
307  /// by debug and exception handling consumers.
308  std::vector<MCCFIInstruction> FrameInstructions;
309 
310  /// \name Exception Handling
311  /// \{
312 
313  /// List of LandingPadInfo describing the landing pad information.
314  std::vector<LandingPadInfo> LandingPads;
315 
316  /// Map a landing pad's EH symbol to the call site indexes.
318 
319  /// Map a landing pad to its index.
321 
322  /// Map of invoke call site index values to associated begin EH_LABEL.
323  DenseMap<MCSymbol*, unsigned> CallSiteMap;
324 
325  /// CodeView label annotations.
326  std::vector<std::pair<MCSymbol *, MDNode *>> CodeViewAnnotations;
327 
328  bool CallsEHReturn = false;
329  bool CallsUnwindInit = false;
330  bool HasEHScopes = false;
331  bool HasEHFunclets = false;
332 
333  /// List of C++ TypeInfo used.
334  std::vector<const GlobalValue *> TypeInfos;
335 
336  /// List of typeids encoding filters used.
337  std::vector<unsigned> FilterIds;
338 
339  /// List of the indices in FilterIds corresponding to filter terminators.
340  std::vector<unsigned> FilterEnds;
341 
342  EHPersonality PersonalityTypeCache = EHPersonality::Unknown;
343 
344  /// \}
345 
346  /// Clear all the members of this MachineFunction, but the ones used
347  /// to initialize again the MachineFunction.
348  /// More specifically, this deallocates all the dynamically allocated
349  /// objects and get rid of all the XXXInfo data structure, but keep
350  /// unchanged the references to Fn, Target, MMI, and FunctionNumber.
351  void clear();
352  /// Allocate and initialize the different members.
353  /// In particular, the XXXInfo data structure.
354  /// \pre Fn, Target, MMI, and FunctionNumber are properly set.
355  void init();
356 
357 public:
361  // The Slot can be negative for fixed stack objects.
362  int Slot;
363  const DILocation *Loc;
364 
366  int Slot, const DILocation *Loc)
367  : Var(Var), Expr(Expr), Slot(Slot), Loc(Loc) {}
368  };
369 
370  class Delegate {
371  virtual void anchor();
372 
373  public:
374  virtual ~Delegate() = default;
375  virtual void MF_HandleInsertion(const MachineInstr &MI) = 0;
376  virtual void MF_HandleRemoval(const MachineInstr &MI) = 0;
377  };
378 
379 private:
380  Delegate *TheDelegate = nullptr;
381 
382  // Callbacks for insertion and removal.
383  void handleInsertion(const MachineInstr &MI);
384  void handleRemoval(const MachineInstr &MI);
385  friend struct ilist_traits<MachineInstr>;
386 
387 public:
390 
391  MachineFunction(const Function &F, const LLVMTargetMachine &Target,
392  const TargetSubtargetInfo &STI, unsigned FunctionNum,
393  MachineModuleInfo &MMI);
394  MachineFunction(const MachineFunction &) = delete;
395  MachineFunction &operator=(const MachineFunction &) = delete;
396  ~MachineFunction();
397 
398  /// Reset the instance as if it was just created.
399  void reset() {
400  clear();
401  init();
402  }
403 
404  /// Reset the currently registered delegate - otherwise assert.
405  void resetDelegate(Delegate *delegate) {
406  assert(TheDelegate == delegate &&
407  "Only the current delegate can perform reset!");
408  TheDelegate = nullptr;
409  }
410 
411  /// Set the delegate. resetDelegate must be called before attempting
412  /// to set.
413  void setDelegate(Delegate *delegate) {
414  assert(delegate && !TheDelegate &&
415  "Attempted to set delegate to null, or to change it without "
416  "first resetting it!");
417 
418  TheDelegate = delegate;
419  }
420 
421  MachineModuleInfo &getMMI() const { return MMI; }
422  MCContext &getContext() const { return Ctx; }
423 
424  PseudoSourceValueManager &getPSVManager() const { return *PSVManager; }
425 
426  /// Return the DataLayout attached to the Module associated to this MF.
427  const DataLayout &getDataLayout() const;
428 
429  /// Return the LLVM function that this machine code represents
430  const Function &getFunction() const { return F; }
431 
432  /// getName - Return the name of the corresponding LLVM function.
433  StringRef getName() const;
434 
435  /// getFunctionNumber - Return a unique ID for the current function.
436  unsigned getFunctionNumber() const { return FunctionNumber; }
437 
438  /// getTarget - Return the target machine this machine code is compiled with
439  const LLVMTargetMachine &getTarget() const { return Target; }
440 
441  /// getSubtarget - Return the subtarget for which this machine code is being
442  /// compiled.
443  const TargetSubtargetInfo &getSubtarget() const { return *STI; }
444  void setSubtarget(const TargetSubtargetInfo *ST) { STI = ST; }
445 
446  /// getSubtarget - This method returns a pointer to the specified type of
447  /// TargetSubtargetInfo. In debug builds, it verifies that the object being
448  /// returned is of the correct type.
449  template<typename STC> const STC &getSubtarget() const {
450  return *static_cast<const STC *>(STI);
451  }
452 
453  /// getRegInfo - Return information about the registers currently in use.
454  MachineRegisterInfo &getRegInfo() { return *RegInfo; }
455  const MachineRegisterInfo &getRegInfo() const { return *RegInfo; }
456 
457  /// getFrameInfo - Return the frame info object for the current function.
458  /// This object contains information about objects allocated on the stack
459  /// frame of the current function in an abstract way.
460  MachineFrameInfo &getFrameInfo() { return *FrameInfo; }
461  const MachineFrameInfo &getFrameInfo() const { return *FrameInfo; }
462 
463  /// getJumpTableInfo - Return the jump table info object for the current
464  /// function. This object contains information about jump tables in the
465  /// current function. If the current function has no jump tables, this will
466  /// return null.
467  const MachineJumpTableInfo *getJumpTableInfo() const { return JumpTableInfo; }
468  MachineJumpTableInfo *getJumpTableInfo() { return JumpTableInfo; }
469 
470  /// getOrCreateJumpTableInfo - Get the JumpTableInfo for this function, if it
471  /// does already exist, allocate one.
472  MachineJumpTableInfo *getOrCreateJumpTableInfo(unsigned JTEntryKind);
473 
474  /// getConstantPool - Return the constant pool object for the current
475  /// function.
478 
479  /// getWasmEHFuncInfo - Return information about how the current function uses
480  /// Wasm exception handling. Returns null for functions that don't use wasm
481  /// exception handling.
482  const WasmEHFuncInfo *getWasmEHFuncInfo() const { return WasmEHInfo; }
483  WasmEHFuncInfo *getWasmEHFuncInfo() { return WasmEHInfo; }
484 
485  /// getWinEHFuncInfo - Return information about how the current function uses
486  /// Windows exception handling. Returns null for functions that don't use
487  /// funclets for exception handling.
488  const WinEHFuncInfo *getWinEHFuncInfo() const { return WinEHInfo; }
489  WinEHFuncInfo *getWinEHFuncInfo() { return WinEHInfo; }
490 
491  /// getAlignment - Return the alignment (log2, not bytes) of the function.
492  unsigned getAlignment() const { return Alignment; }
493 
494  /// setAlignment - Set the alignment (log2, not bytes) of the function.
495  void setAlignment(unsigned A) { Alignment = A; }
496 
497  /// ensureAlignment - Make sure the function is at least 1 << A bytes aligned.
498  void ensureAlignment(unsigned A) {
499  if (Alignment < A) Alignment = A;
500  }
501 
502  /// exposesReturnsTwice - Returns true if the function calls setjmp or
503  /// any other similar functions with attribute "returns twice" without
504  /// having the attribute itself.
505  bool exposesReturnsTwice() const {
506  return ExposesReturnsTwice;
507  }
508 
509  /// setCallsSetJmp - Set a flag that indicates if there's a call to
510  /// a "returns twice" function.
512  ExposesReturnsTwice = B;
513  }
514 
515  /// Returns true if the function contains any inline assembly.
516  bool hasInlineAsm() const {
517  return HasInlineAsm;
518  }
519 
520  /// Set a flag that indicates that the function contains inline assembly.
521  void setHasInlineAsm(bool B) {
522  HasInlineAsm = B;
523  }
524 
525  bool hasWinCFI() const {
526  return HasWinCFI;
527  }
528  void setHasWinCFI(bool v) { HasWinCFI = v; }
529 
530  /// Get the function properties
531  const MachineFunctionProperties &getProperties() const { return Properties; }
532  MachineFunctionProperties &getProperties() { return Properties; }
533 
534  /// getInfo - Keep track of various per-function pieces of information for
535  /// backends that would like to do so.
536  ///
537  template<typename Ty>
538  Ty *getInfo() {
539  if (!MFInfo)
540  MFInfo = Ty::template create<Ty>(Allocator, *this);
541  return static_cast<Ty*>(MFInfo);
542  }
543 
544  template<typename Ty>
545  const Ty *getInfo() const {
546  return const_cast<MachineFunction*>(this)->getInfo<Ty>();
547  }
548 
549  /// getBlockNumbered - MachineBasicBlocks are automatically numbered when they
550  /// are inserted into the machine function. The block number for a machine
551  /// basic block can be found by using the MBB::getNumber method, this method
552  /// provides the inverse mapping.
554  assert(N < MBBNumbering.size() && "Illegal block number");
555  assert(MBBNumbering[N] && "Block was removed from the machine function!");
556  return MBBNumbering[N];
557  }
558 
559  /// Should we be emitting segmented stack stuff for the function
560  bool shouldSplitStack() const;
561 
562  /// getNumBlockIDs - Return the number of MBB ID's allocated.
563  unsigned getNumBlockIDs() const { return (unsigned)MBBNumbering.size(); }
564 
565  /// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
566  /// recomputes them. This guarantees that the MBB numbers are sequential,
567  /// dense, and match the ordering of the blocks within the function. If a
568  /// specific MachineBasicBlock is specified, only that block and those after
569  /// it are renumbered.
570  void RenumberBlocks(MachineBasicBlock *MBBFrom = nullptr);
571 
572  /// print - Print out the MachineFunction in a format suitable for debugging
573  /// to the specified stream.
574  void print(raw_ostream &OS, const SlotIndexes* = nullptr) const;
575 
576  /// viewCFG - This function is meant for use from the debugger. You can just
577  /// say 'call F->viewCFG()' and a ghostview window should pop up from the
578  /// program, displaying the CFG of the current function with the code for each
579  /// basic block inside. This depends on there being a 'dot' and 'gv' program
580  /// in your path.
581  void viewCFG() const;
582 
583  /// viewCFGOnly - This function is meant for use from the debugger. It works
584  /// just like viewCFG, but it does not include the contents of basic blocks
585  /// into the nodes, just the label. If you are only interested in the CFG
586  /// this can make the graph smaller.
587  ///
588  void viewCFGOnly() const;
589 
590  /// dump - Print the current MachineFunction to cerr, useful for debugger use.
591  void dump() const;
592 
593  /// Run the current MachineFunction through the machine code verifier, useful
594  /// for debugger use.
595  /// \returns true if no problems were found.
596  bool verify(Pass *p = nullptr, const char *Banner = nullptr,
597  bool AbortOnError = true) const;
598 
599  // Provide accessors for the MachineBasicBlock list...
600  using iterator = BasicBlockListType::iterator;
604 
605  /// Support for MachineBasicBlock::getNextNode().
608  return &MachineFunction::BasicBlocks;
609  }
610 
611  /// addLiveIn - Add the specified physical register as a live-in value and
612  /// create a corresponding virtual register for it.
613  unsigned addLiveIn(unsigned PReg, const TargetRegisterClass *RC);
614 
615  //===--------------------------------------------------------------------===//
616  // BasicBlock accessor functions.
617  //
618  iterator begin() { return BasicBlocks.begin(); }
619  const_iterator begin() const { return BasicBlocks.begin(); }
620  iterator end () { return BasicBlocks.end(); }
621  const_iterator end () const { return BasicBlocks.end(); }
622 
623  reverse_iterator rbegin() { return BasicBlocks.rbegin(); }
624  const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
625  reverse_iterator rend () { return BasicBlocks.rend(); }
626  const_reverse_iterator rend () const { return BasicBlocks.rend(); }
627 
628  unsigned size() const { return (unsigned)BasicBlocks.size();}
629  bool empty() const { return BasicBlocks.empty(); }
630  const MachineBasicBlock &front() const { return BasicBlocks.front(); }
631  MachineBasicBlock &front() { return BasicBlocks.front(); }
632  const MachineBasicBlock & back() const { return BasicBlocks.back(); }
633  MachineBasicBlock & back() { return BasicBlocks.back(); }
634 
635  void push_back (MachineBasicBlock *MBB) { BasicBlocks.push_back (MBB); }
636  void push_front(MachineBasicBlock *MBB) { BasicBlocks.push_front(MBB); }
637  void insert(iterator MBBI, MachineBasicBlock *MBB) {
638  BasicBlocks.insert(MBBI, MBB);
639  }
640  void splice(iterator InsertPt, iterator MBBI) {
641  BasicBlocks.splice(InsertPt, BasicBlocks, MBBI);
642  }
643  void splice(iterator InsertPt, MachineBasicBlock *MBB) {
644  BasicBlocks.splice(InsertPt, BasicBlocks, MBB);
645  }
646  void splice(iterator InsertPt, iterator MBBI, iterator MBBE) {
647  BasicBlocks.splice(InsertPt, BasicBlocks, MBBI, MBBE);
648  }
649 
650  void remove(iterator MBBI) { BasicBlocks.remove(MBBI); }
651  void remove(MachineBasicBlock *MBBI) { BasicBlocks.remove(MBBI); }
652  void erase(iterator MBBI) { BasicBlocks.erase(MBBI); }
653  void erase(MachineBasicBlock *MBBI) { BasicBlocks.erase(MBBI); }
654 
655  template <typename Comp>
656  void sort(Comp comp) {
657  BasicBlocks.sort(comp);
658  }
659 
660  /// Return the number of \p MachineInstrs in this \p MachineFunction.
661  unsigned getInstructionCount() const {
662  unsigned InstrCount = 0;
663  for (const MachineBasicBlock &MBB : BasicBlocks)
664  InstrCount += MBB.size();
665  return InstrCount;
666  }
667 
668  //===--------------------------------------------------------------------===//
669  // Internal functions used to automatically number MachineBasicBlocks
670 
671  /// Adds the MBB to the internal numbering. Returns the unique number
672  /// assigned to the MBB.
674  MBBNumbering.push_back(MBB);
675  return (unsigned)MBBNumbering.size()-1;
676  }
677 
678  /// removeFromMBBNumbering - Remove the specific machine basic block from our
679  /// tracker, this is only really to be used by the MachineBasicBlock
680  /// implementation.
681  void removeFromMBBNumbering(unsigned N) {
682  assert(N < MBBNumbering.size() && "Illegal basic block #");
683  MBBNumbering[N] = nullptr;
684  }
685 
686  /// CreateMachineInstr - Allocate a new MachineInstr. Use this instead
687  /// of `new MachineInstr'.
688  MachineInstr *CreateMachineInstr(const MCInstrDesc &MCID, const DebugLoc &DL,
689  bool NoImp = false);
690 
691  /// Create a new MachineInstr which is a copy of \p Orig, identical in all
692  /// ways except the instruction has no parent, prev, or next. Bundling flags
693  /// are reset.
694  ///
695  /// Note: Clones a single instruction, not whole instruction bundles.
696  /// Does not perform target specific adjustments; consider using
697  /// TargetInstrInfo::duplicate() instead.
698  MachineInstr *CloneMachineInstr(const MachineInstr *Orig);
699 
700  /// Clones instruction or the whole instruction bundle \p Orig and insert
701  /// into \p MBB before \p InsertBefore.
702  ///
703  /// Note: Does not perform target specific adjustments; consider using
704  /// TargetInstrInfo::duplicate() intead.
705  MachineInstr &CloneMachineInstrBundle(MachineBasicBlock &MBB,
706  MachineBasicBlock::iterator InsertBefore, const MachineInstr &Orig);
707 
708  /// DeleteMachineInstr - Delete the given MachineInstr.
709  void DeleteMachineInstr(MachineInstr *MI);
710 
711  /// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this
712  /// instead of `new MachineBasicBlock'.
713  MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = nullptr);
714 
715  /// DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
716  void DeleteMachineBasicBlock(MachineBasicBlock *MBB);
717 
718  /// getMachineMemOperand - Allocate a new MachineMemOperand.
719  /// MachineMemOperands are owned by the MachineFunction and need not be
720  /// explicitly deallocated.
721  MachineMemOperand *getMachineMemOperand(
722  MachinePointerInfo PtrInfo, MachineMemOperand::Flags f, uint64_t s,
723  unsigned base_alignment, const AAMDNodes &AAInfo = AAMDNodes(),
724  const MDNode *Ranges = nullptr,
727  AtomicOrdering FailureOrdering = AtomicOrdering::NotAtomic);
728 
729  /// getMachineMemOperand - Allocate a new MachineMemOperand by copying
730  /// an existing one, adjusting by an offset and using the given size.
731  /// MachineMemOperands are owned by the MachineFunction and need not be
732  /// explicitly deallocated.
733  MachineMemOperand *getMachineMemOperand(const MachineMemOperand *MMO,
734  int64_t Offset, uint64_t Size);
735 
736  /// Allocate a new MachineMemOperand by copying an existing one,
737  /// replacing only AliasAnalysis information. MachineMemOperands are owned
738  /// by the MachineFunction and need not be explicitly deallocated.
739  MachineMemOperand *getMachineMemOperand(const MachineMemOperand *MMO,
740  const AAMDNodes &AAInfo);
741 
743 
744  /// Allocate an array of MachineOperands. This is only intended for use by
745  /// internal MachineInstr functions.
747  return OperandRecycler.allocate(Cap, Allocator);
748  }
749 
750  /// Dellocate an array of MachineOperands and recycle the memory. This is
751  /// only intended for use by internal MachineInstr functions.
752  /// Cap must be the same capacity that was used to allocate the array.
754  OperandRecycler.deallocate(Cap, Array);
755  }
756 
757  /// Allocate and initialize a register mask with @p NumRegister bits.
758  uint32_t *allocateRegMask();
759 
760  /// Allocate and construct an extra info structure for a `MachineInstr`.
761  ///
762  /// This is allocated on the function's allocator and so lives the life of
763  /// the function.
764  MachineInstr::ExtraInfo *
765  createMIExtraInfo(ArrayRef<MachineMemOperand *> MMOs,
766  MCSymbol *PreInstrSymbol = nullptr,
767  MCSymbol *PostInstrSymbol = nullptr);
768 
769  /// Allocate a string and populate it with the given external symbol name.
770  const char *createExternalSymbolName(StringRef Name);
771 
772  //===--------------------------------------------------------------------===//
773  // Label Manipulation.
774 
775  /// getJTISymbol - Return the MCSymbol for the specified non-empty jump table.
776  /// If isLinkerPrivate is specified, an 'l' label is returned, otherwise a
777  /// normal 'L' label is returned.
778  MCSymbol *getJTISymbol(unsigned JTI, MCContext &Ctx,
779  bool isLinkerPrivate = false) const;
780 
781  /// getPICBaseSymbol - Return a function-local symbol to represent the PIC
782  /// base.
783  MCSymbol *getPICBaseSymbol() const;
784 
785  /// Returns a reference to a list of cfi instructions in the function's
786  /// prologue. Used to construct frame maps for debug and exception handling
787  /// comsumers.
788  const std::vector<MCCFIInstruction> &getFrameInstructions() const {
789  return FrameInstructions;
790  }
791 
793  FrameInstructions.push_back(Inst);
794  return FrameInstructions.size() - 1;
795  }
796 
797  /// \name Exception Handling
798  /// \{
799 
800  bool callsEHReturn() const { return CallsEHReturn; }
801  void setCallsEHReturn(bool b) { CallsEHReturn = b; }
802 
803  bool callsUnwindInit() const { return CallsUnwindInit; }
804  void setCallsUnwindInit(bool b) { CallsUnwindInit = b; }
805 
806  bool hasEHScopes() const { return HasEHScopes; }
807  void setHasEHScopes(bool V) { HasEHScopes = V; }
808 
809  bool hasEHFunclets() const { return HasEHFunclets; }
810  void setHasEHFunclets(bool V) { HasEHFunclets = V; }
811 
812  /// Find or create an LandingPadInfo for the specified MachineBasicBlock.
813  LandingPadInfo &getOrCreateLandingPadInfo(MachineBasicBlock *LandingPad);
814 
815  /// Remap landing pad labels and remove any deleted landing pads.
816  void tidyLandingPads(DenseMap<MCSymbol *, uintptr_t> *LPMap = nullptr,
817  bool TidyIfNoBeginLabels = true);
818 
819  /// Return a reference to the landing pad info for the current function.
820  const std::vector<LandingPadInfo> &getLandingPads() const {
821  return LandingPads;
822  }
823 
824  /// Provide the begin and end labels of an invoke style call and associate it
825  /// with a try landing pad block.
826  void addInvoke(MachineBasicBlock *LandingPad,
827  MCSymbol *BeginLabel, MCSymbol *EndLabel);
828 
829  /// Add a new panding pad, and extract the exception handling information from
830  /// the landingpad instruction. Returns the label ID for the landing pad
831  /// entry.
832  MCSymbol *addLandingPad(MachineBasicBlock *LandingPad);
833 
834  /// Provide the catch typeinfo for a landing pad.
835  void addCatchTypeInfo(MachineBasicBlock *LandingPad,
837 
838  /// Provide the filter typeinfo for a landing pad.
839  void addFilterTypeInfo(MachineBasicBlock *LandingPad,
841 
842  /// Add a cleanup action for a landing pad.
843  void addCleanup(MachineBasicBlock *LandingPad);
844 
845  void addSEHCatchHandler(MachineBasicBlock *LandingPad, const Function *Filter,
846  const BlockAddress *RecoverBA);
847 
848  void addSEHCleanupHandler(MachineBasicBlock *LandingPad,
849  const Function *Cleanup);
850 
851  /// Return the type id for the specified typeinfo. This is function wide.
852  unsigned getTypeIDFor(const GlobalValue *TI);
853 
854  /// Return the id of the filter encoded by TyIds. This is function wide.
855  int getFilterIDFor(std::vector<unsigned> &TyIds);
856 
857  /// Map the landing pad's EH symbol to the call site indexes.
858  void setCallSiteLandingPad(MCSymbol *Sym, ArrayRef<unsigned> Sites);
859 
860  /// Map the landing pad to its index. Used for Wasm exception handling.
861  void setWasmLandingPadIndex(const MachineBasicBlock *LPad, unsigned Index) {
862  WasmLPadToIndexMap[LPad] = Index;
863  }
864 
865  /// Returns true if the landing pad has an associate index in wasm EH.
866  bool hasWasmLandingPadIndex(const MachineBasicBlock *LPad) const {
867  return WasmLPadToIndexMap.count(LPad);
868  }
869 
870  /// Get the index in wasm EH for a given landing pad.
871  unsigned getWasmLandingPadIndex(const MachineBasicBlock *LPad) const {
872  assert(hasWasmLandingPadIndex(LPad));
873  return WasmLPadToIndexMap.lookup(LPad);
874  }
875 
876  /// Get the call site indexes for a landing pad EH symbol.
878  assert(hasCallSiteLandingPad(Sym) &&
879  "missing call site number for landing pad!");
880  return LPadToCallSiteMap[Sym];
881  }
882 
883  /// Return true if the landing pad Eh symbol has an associated call site.
885  return !LPadToCallSiteMap[Sym].empty();
886  }
887 
888  /// Map the begin label for a call site.
889  void setCallSiteBeginLabel(MCSymbol *BeginLabel, unsigned Site) {
890  CallSiteMap[BeginLabel] = Site;
891  }
892 
893  /// Get the call site number for a begin label.
894  unsigned getCallSiteBeginLabel(MCSymbol *BeginLabel) const {
895  assert(hasCallSiteBeginLabel(BeginLabel) &&
896  "Missing call site number for EH_LABEL!");
897  return CallSiteMap.lookup(BeginLabel);
898  }
899 
900  /// Return true if the begin label has a call site number associated with it.
901  bool hasCallSiteBeginLabel(MCSymbol *BeginLabel) const {
902  return CallSiteMap.count(BeginLabel);
903  }
904 
905  /// Record annotations associated with a particular label.
907  CodeViewAnnotations.push_back({Label, MD});
908  }
909 
911  return CodeViewAnnotations;
912  }
913 
914  /// Return a reference to the C++ typeinfo for the current function.
915  const std::vector<const GlobalValue *> &getTypeInfos() const {
916  return TypeInfos;
917  }
918 
919  /// Return a reference to the typeids encoding filters used in the current
920  /// function.
921  const std::vector<unsigned> &getFilterIds() const {
922  return FilterIds;
923  }
924 
925  /// \}
926 
927  /// Collect information used to emit debugging information of a variable.
928  void setVariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
929  int Slot, const DILocation *Loc) {
930  VariableDbgInfos.emplace_back(Var, Expr, Slot, Loc);
931  }
932 
933  VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfos; }
935  return VariableDbgInfos;
936  }
937 };
938 
939 //===--------------------------------------------------------------------===//
940 // GraphTraits specializations for function basic block graphs (CFGs)
941 //===--------------------------------------------------------------------===//
942 
943 // Provide specializations of GraphTraits to be able to treat a
944 // machine function as a graph of machine basic blocks... these are
945 // the same as the machine basic block iterators, except that the root
946 // node is implicitly the first node of the function.
947 //
948 template <> struct GraphTraits<MachineFunction*> :
950  static NodeRef getEntryNode(MachineFunction *F) { return &F->front(); }
951 
952  // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
954 
956  return nodes_iterator(F->begin());
957  }
958 
960  return nodes_iterator(F->end());
961  }
962 
963  static unsigned size (MachineFunction *F) { return F->size(); }
964 };
965 template <> struct GraphTraits<const MachineFunction*> :
967  static NodeRef getEntryNode(const MachineFunction *F) { return &F->front(); }
968 
969  // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
971 
973  return nodes_iterator(F->begin());
974  }
975 
977  return nodes_iterator(F->end());
978  }
979 
980  static unsigned size (const MachineFunction *F) {
981  return F->size();
982  }
983 };
984 
985 // Provide specializations of GraphTraits to be able to treat a function as a
986 // graph of basic blocks... and to walk it in inverse order. Inverse order for
987 // a function is considered to be when traversing the predecessor edges of a BB
988 // instead of the successor edges.
989 //
990 template <> struct GraphTraits<Inverse<MachineFunction*>> :
993  return &G.Graph->front();
994  }
995 };
996 template <> struct GraphTraits<Inverse<const MachineFunction*>> :
999  return &G.Graph->front();
1000  }
1001 };
1002 
1003 } // end namespace llvm
1004 
1005 #endif // LLVM_CODEGEN_MACHINEFUNCTION_H
void push_front(MachineBasicBlock *MBB)
Pass interface - Implemented by all &#39;passes&#39;.
Definition: Pass.h:81
ArrayRef< std::pair< MCSymbol *, MDNode * > > getCodeViewAnnotations() const
unsigned getInstructionCount() const
Return the number of MachineInstrs in this MachineFunction.
A parsed version of the target data layout string in and methods for querying it. ...
Definition: DataLayout.h:111
The MachineConstantPool class keeps track of constants referenced by a function which must be spilled...
bool hasCallSiteLandingPad(MCSymbol *Sym)
Return true if the landing pad Eh symbol has an associated call site.
static BasicBlockListType MachineFunction::* getSublistAccess(MachineBasicBlock *)
Support for MachineBasicBlock::getNextNode().
unsigned getFunctionNumber() const
getFunctionNumber - Return a unique ID for the current function.
Atomic ordering constants.
iterator erase(iterator where)
Definition: ilist.h:267
const std::vector< MCCFIInstruction > & getFrameInstructions() const
Returns a reference to a list of cfi instructions in the function&#39;s prologue.
This class represents lattice values for constants.
Definition: AllocatorList.h:24
MachineFunctionProperties & reset(Property P)
Various leaf nodes.
Definition: ISDOpcodes.h:60
void setCallsUnwindInit(bool b)
T * allocate(Capacity Cap, AllocatorType &Allocator)
Allocate an array of at least the requested capacity.
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
void transferNodesFromList(ilist_callback_traits &OldList, Iterator, Iterator)
unsigned getNumBlockIDs() const
getNumBlockIDs - Return the number of MBB ID&#39;s allocated.
static nodes_iterator nodes_end(MachineFunction *F)
void setHasEHFunclets(bool V)
const Function * FilterOrFinally
Filter or finally function. Null indicates a catch-all.
const MachineFunctionProperties & getProperties() const
Get the function properties.
unsigned size() const
Describe properties that are true of each instruction in the target description file.
Definition: MCInstrDesc.h:164
This file contains the declarations for metadata subclasses.
unsigned getCallSiteBeginLabel(MCSymbol *BeginLabel) const
Get the call site number for a begin label.
bool test(unsigned Idx) const
Definition: BitVector.h:502
Template traits for intrusive list.
Definition: ilist.h:91
void sort(Comp comp)
A debug info location.
Definition: DebugLoc.h:34
Metadata node.
Definition: Metadata.h:864
F(f)
MachineModuleInfo & getMMI() const
static unsigned InstrCount
static NodeRef getEntryNode(Inverse< MachineFunction *> G)
void resetDelegate(Delegate *delegate)
Reset the currently registered delegate - otherwise assert.
static nodes_iterator nodes_begin(const MachineFunction *F)
const MachineConstantPool * getConstantPool() const
VariableDbgInfoMapTy & getVariableDbgInfo()
This file defines the MallocAllocator and BumpPtrAllocator interfaces.
const std::vector< unsigned > & getFilterIds() const
Return a reference to the typeids encoding filters used in the current function.
static nodes_iterator nodes_begin(MachineFunction *F)
MachineFunctionInfo - This class can be derived from and used by targets to hold private target-speci...
#define LLVM_NODISCARD
LLVM_NODISCARD - Warn if a type or return value is discarded.
Definition: Compiler.h:129
The address of a basic block.
Definition: Constants.h:840
A description of a memory reference used in the backend.
amdgpu Simplify well known AMD library false Value Value const Twine & Name
MachineJumpTableInfo * getJumpTableInfo()
SmallVector< MCSymbol *, 1 > EndLabels
static unsigned addLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
SmallVector< SEHHandler, 1 > SEHHandlers
static StringRef getName(Value *V)
unsigned getAlignment() const
getAlignment - Return the alignment (log2, not bytes) of the function.
The MachineFrameInfo class represents an abstract stack frame until prolog/epilog code is inserted...
LLVM_NODISCARD unsigned addFrameInst(const MCCFIInstruction &Inst)
const_iterator end() const
SmallVectorImpl< unsigned > & getCallSiteLandingPad(MCSymbol *Sym)
Get the call site indexes for a landing pad EH symbol.
AtomicOrdering
Atomic ordering for LLVM&#39;s memory model.
Context object for machine code objects.
Definition: MCContext.h:63
This structure is used to retain landing pad info for the current function.
SlotIndexes pass.
Definition: SlotIndexes.h:331
void erase(MachineBasicBlock *MBBI)
PseudoSourceValueManager & getPSVManager() const
void setCallSiteBeginLabel(MCSymbol *BeginLabel, unsigned Site)
Map the begin label for a call site.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:33
const MachineFrameInfo & getFrameInfo() const
VariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr, int Slot, const DILocation *Loc)
Debug location.
const_iterator begin() const
bool hasCallSiteBeginLabel(MCSymbol *BeginLabel) const
Return true if the begin label has a call site number associated with it.
BasicBlockListType::iterator iterator
ArrayRecycler< MachineOperand >::Capacity OperandCapacity
MCContext & getContext() const
Use delete by default for iplist and ilist.
Definition: ilist.h:41
void setHasEHScopes(bool V)
void setDelegate(Delegate *delegate)
Set the delegate.
#define P(N)
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:419
typename MachineBasicBlock *::UnknownGraphTypeError NodeRef
Definition: GraphTraits.h:79
MachineBasicBlock * getBlockNumbered(unsigned N) const
getBlockNumbered - MachineBasicBlocks are automatically numbered when they are inserted into the mach...
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
void dump(const SparseBitVector< ElementSize > &LHS, raw_ostream &out)
LLVM Basic Block Representation.
Definition: BasicBlock.h:58
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
Allocate memory in an ever growing pool, as if by bump-pointer.
Definition: Allocator.h:141
void push_front(pointer val)
Definition: ilist.h:312
MachineFrameInfo & getFrameInfo()
getFrameInfo - Return the frame info object for the current function.
bool hasEHFunclets() const
SmallVector< MCSymbol *, 1 > BeginLabels
static NodeRef getEntryNode(MachineFunction *F)
LLVM_ATTRIBUTE_RETURNS_NONNULL LLVM_ATTRIBUTE_RETURNS_NOALIAS void * Allocate(size_t Size, size_t Alignment)
Allocate space at the specified alignment.
Definition: Allocator.h:215
const_reverse_iterator rend() const
const MachineRegisterInfo & getRegInfo() const
void ensureAlignment(unsigned A)
ensureAlignment - Make sure the function is at least 1 << A bytes aligned.
bool verifyRequiredProperties(const MachineFunctionProperties &V) const
void splice(iterator where, iplist_impl &L2)
Definition: ilist.h:329
std::vector< int > TypeIds
void setSubtarget(const TargetSubtargetInfo *ST)
This class describes a target machine that is implemented with the LLVM target-independent code gener...
Ty * getInfo()
getInfo - Keep track of various per-function pieces of information for backends that would like to do...
static void print(raw_ostream &Out, object::Archive::Kind Kind, T Val)
void setHasInlineAsm(bool B)
Set a flag that indicates that the function contains inline assembly.
void splice(iterator InsertPt, iterator MBBI, iterator MBBE)
WinEHFuncInfo * getWinEHFuncInfo()
MachineConstantPool * getConstantPool()
getConstantPool - Return the constant pool object for the current function.
const Ty * getInfo() const
const MachineBasicBlock & front() const
MachineBasicBlock & back()
An intrusive list with ownership and callbacks specified/controlled by ilist_traits, only with API safe for polymorphic types.
Definition: ilist.h:390
This class contains a discriminated union of information about pointers in memory operands...
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
bool verify(const TargetRegisterInfo &TRI) const
Check that information hold by this instance make sense for the given TRI.
const STC & getSubtarget() const
getSubtarget - This method returns a pointer to the specified type of TargetSubtargetInfo.
const std::vector< LandingPadInfo > & getLandingPads() const
Return a reference to the landing pad info for the current function.
Basic Register Allocator
print lazy value Lazy Value Info Printer Pass
Iterator for intrusive lists based on ilist_node.
const GraphType & Graph
Definition: GraphTraits.h:97
Recycler - This class manages a linked-list of deallocated nodes and facilitates reusing deallocated ...
Definition: Recycler.h:35
void splice(iterator InsertPt, iterator MBBI)
WasmEHFuncInfo * getWasmEHFuncInfo()
MachineOperand class - Representation of each machine instruction operand.
This is a &#39;vector&#39; (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:847
unsigned getWasmLandingPadIndex(const MachineBasicBlock *LPad) const
Get the index in wasm EH for a given landing pad.
const DataFlowGraph & G
Definition: RDFGraph.cpp:211
A collection of metadata nodes that might be associated with a memory access used by the alias-analys...
Definition: Metadata.h:644
void setCallsEHReturn(bool b)
MachineFunctionProperties & getProperties()
const WinEHFuncInfo * getWinEHFuncInfo() const
getWinEHFuncInfo - Return information about how the current function uses Windows exception handling...
bool callsUnwindInit() const
static void deleteNode(NodeTy *V)
Definition: ilist.h:42
DWARF expression.
const Function & getFunction() const
Return the LLVM function that this machine code represents.
reverse_iterator rend()
bool callsEHReturn() const
void splice(iterator InsertPt, MachineBasicBlock *MBB)
MachineFunctionProperties & reset()
Reset all the properties.
Target - Wrapper for Target specific information.
void push_back(pointer val)
Definition: ilist.h:313
static void clear(coro::Shape &Shape)
Definition: Coroutines.cpp:212
static unsigned size(MachineFunction *F)
MachineBasicBlock * LandingPadBlock
FunctionNumber(functionNumber)
Definition: LLParser.cpp:2729
Flags
Flags values. These may be or&#39;d together.
MachineRegisterInfo - Keep track of information for virtual and physical registers, including vreg register classes, use/def chains for registers, etc.
MachineFunctionProperties & set(Property P)
TargetSubtargetInfo - Generic base class for all target subtargets.
const WasmEHFuncInfo * getWasmEHFuncInfo() const
getWasmEHFuncInfo - Return information about how the current function uses Wasm exception handling...
Representation of each machine instruction.
Definition: MachineInstr.h:64
pointer remove(iterator &IT)
Definition: ilist.h:251
static Ty * create(BumpPtrAllocator &Allocator, MachineFunction &MF)
Factory function: default behavior is to call new using the supplied allocator.
void reset()
Reset the instance as if it was just created.
iterator insert(iterator where, pointer New)
Definition: ilist.h:228
static unsigned size(const MachineFunction *F)
void emplace_back(ArgTypes &&... Args)
Definition: SmallVector.h:652
MachineRegisterInfo & getRegInfo()
getRegInfo - Return information about the registers currently in use.
bool exposesReturnsTwice() const
exposesReturnsTwice - Returns true if the function calls setjmp or any other similar functions with a...
LandingPadInfo(MachineBasicBlock *MBB)
#define N
bool hasInlineAsm() const
Returns true if the function contains any inline assembly.
static GCRegistry::Add< ErlangGC > A("erlang", "erlang-compatible garbage collector")
const MachineBasicBlock & back() const
MachineBasicBlock & front()
uint32_t Size
Definition: Profile.cpp:47
void setExposesReturnsTwice(bool B)
setCallsSetJmp - Set a flag that indicates if there&#39;s a call to a "returns twice" function...
void removeFromMBBNumbering(unsigned N)
removeFromMBBNumbering - Remove the specific machine basic block from our tracker, this is only really to be used by the MachineBasicBlock implementation.
const LLVMTargetMachine & getTarget() const
getTarget - Return the target machine this machine code is compiled with
bool hasWasmLandingPadIndex(const MachineBasicBlock *LPad) const
Returns true if the landing pad has an associate index in wasm EH.
size_type count(const_arg_type_t< KeyT > Val) const
Return 1 if the specified key is in the map, 0 otherwise.
Definition: DenseMap.h:171
ValueT lookup(const_arg_type_t< KeyT > Val) const
lookup - Return the entry for the specified key, or a default constructed value if no such entry exis...
Definition: DenseMap.h:211
void setWasmLandingPadIndex(const MachineBasicBlock *LPad, unsigned Index)
Map the landing pad to its index. Used for Wasm exception handling.
static NodeRef getEntryNode(const MachineFunction *F)
void erase(iterator MBBI)
const_reverse_iterator rbegin() const
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
bool hasProperty(Property P) const
void insert(iterator MBBI, MachineBasicBlock *MBB)
static nodes_iterator nodes_end(const MachineFunction *F)
MachineFunctionProperties & reset(const MachineFunctionProperties &MFP)
aarch64 promote const
unsigned addToMBBNumbering(MachineBasicBlock *MBB)
Adds the MBB to the internal numbering.
void deallocateOperandArray(OperandCapacity Cap, MachineOperand *Array)
Dellocate an array of MachineOperands and recycle the memory.
void push_back(MachineBasicBlock *MBB)
Synchronized with respect to all concurrently executing threads.
Definition: LLVMContext.h:59
const BlockAddress * RecoverBA
Address of block to recover at. Null for a finally handler.
void setAlignment(unsigned A)
setAlignment - Set the alignment (log2, not bytes) of the function.
static NodeRef getEntryNode(Inverse< const MachineFunction *> G)
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46
Callbacks do nothing by default in iplist and ilist.
Definition: ilist.h:65
const VariableDbgInfoMapTy & getVariableDbgInfo() const
void deallocate(Capacity Cap, T *Ptr)
Deallocate an array with the specified Capacity.
IRTranslator LLVM IR MI
Manages creation of pseudo source values.
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
void addCodeViewAnnotation(MCSymbol *Label, MDNode *MD)
Record annotations associated with a particular label.
const std::vector< const GlobalValue * > & getTypeInfos() const
Return a reference to the C++ typeinfo for the current function.
const MachineJumpTableInfo * getJumpTableInfo() const
getJumpTableInfo - Return the jump table info object for the current function.
void setVariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr, int Slot, const DILocation *Loc)
Collect information used to emit debugging information of a variable.
reverse_iterator rbegin()
VariableDbgInfoMapTy VariableDbgInfos
MachineOperand * allocateOperandArray(OperandCapacity Cap)
Allocate an array of MachineOperands.
Properties which a MachineFunction may have at a given point in time.
This class contains meta information specific to a module.