LLVM  9.0.0svn
MachineFunction.h
Go to the documentation of this file.
1 //===- llvm/CodeGen/MachineFunction.h ---------------------------*- 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 // Collect native machine code for a function. This class contains a list of
10 // MachineBasicBlock instances that make up the current compiled function.
11 //
12 // This class also contains pointers to various classes which hold
13 // target-specific information about the generated code.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
18 #define LLVM_CODEGEN_MACHINEFUNCTION_H
19 
20 #include "llvm/ADT/ArrayRef.h"
21 #include "llvm/ADT/BitVector.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/ADT/GraphTraits.h"
24 #include "llvm/ADT/Optional.h"
25 #include "llvm/ADT/SmallVector.h"
26 #include "llvm/ADT/StringRef.h"
27 #include "llvm/ADT/ilist.h"
28 #include "llvm/ADT/iterator.h"
33 #include "llvm/IR/DebugLoc.h"
34 #include "llvm/IR/Instructions.h"
35 #include "llvm/IR/Metadata.h"
36 #include "llvm/MC/MCDwarf.h"
37 #include "llvm/MC/MCSymbol.h"
38 #include "llvm/Support/Allocator.h"
41 #include "llvm/Support/Compiler.h"
43 #include "llvm/Support/Recycler.h"
44 #include <cassert>
45 #include <cstdint>
46 #include <memory>
47 #include <utility>
48 #include <vector>
49 
50 namespace llvm {
51 
52 class BasicBlock;
53 class BlockAddress;
54 class DataLayout;
55 class DIExpression;
56 class DILocalVariable;
57 class DILocation;
58 class Function;
59 class GlobalValue;
60 class LLVMTargetMachine;
61 class MachineConstantPool;
62 class MachineFrameInfo;
63 class MachineFunction;
64 class MachineJumpTableInfo;
65 class MachineModuleInfo;
66 class MachineRegisterInfo;
67 class MCContext;
68 class MCInstrDesc;
69 class Pass;
70 class PseudoSourceValueManager;
71 class raw_ostream;
72 class SlotIndexes;
73 class TargetRegisterClass;
74 class TargetSubtargetInfo;
75 struct WasmEHFuncInfo;
76 struct WinEHFuncInfo;
77 
79  void deleteNode(MachineBasicBlock *MBB);
80 };
81 
83  void addNodeToList(MachineBasicBlock* N);
84  void removeNodeFromList(MachineBasicBlock* N);
85 
86  template <class Iterator>
87  void transferNodesFromList(ilist_callback_traits &OldList, Iterator, Iterator) {
88  assert(this == &OldList && "never transfer MBBs between functions");
89  }
90 };
91 
92 /// MachineFunctionInfo - This class can be derived from and used by targets to
93 /// hold private target-specific information for each MachineFunction. Objects
94 /// of type are accessed/created with MF::getInfo and destroyed when the
95 /// MachineFunction is destroyed.
97  virtual ~MachineFunctionInfo();
98 
99  /// Factory function: default behavior is to call new using the
100  /// supplied allocator.
101  ///
102  /// This function can be overridden in a derive class.
103  template<typename Ty>
105  return new (Allocator.Allocate<Ty>()) Ty(MF);
106  }
107 };
108 
109 /// Properties which a MachineFunction may have at a given point in time.
110 /// Each of these has checking code in the MachineVerifier, and passes can
111 /// require that a property be set.
113  // Possible TODO: Allow targets to extend this (perhaps by allowing the
114  // constructor to specify the size of the bit vector)
115  // Possible TODO: Allow requiring the negative (e.g. VRegsAllocated could be
116  // stated as the negative of "has vregs"
117 
118 public:
119  // The properties are stated in "positive" form; i.e. a pass could require
120  // that the property hold, but not that it does not hold.
121 
122  // Property descriptions:
123  // IsSSA: True when the machine function is in SSA form and virtual registers
124  // have a single def.
125  // NoPHIs: The machine function does not contain any PHI instruction.
126  // TracksLiveness: True when tracking register liveness accurately.
127  // While this property is set, register liveness information in basic block
128  // live-in lists and machine instruction operands (e.g. kill flags, implicit
129  // defs) is accurate. This means it can be used to change the code in ways
130  // that affect the values in registers, for example by the register
131  // scavenger.
132  // When this property is clear, liveness is no longer reliable.
133  // NoVRegs: The machine function does not use any virtual registers.
134  // Legalized: In GlobalISel: the MachineLegalizer ran and all pre-isel generic
135  // instructions have been legalized; i.e., all instructions are now one of:
136  // - generic and always legal (e.g., COPY)
137  // - target-specific
138  // - legal pre-isel generic instructions.
139  // RegBankSelected: In GlobalISel: the RegBankSelect pass ran and all generic
140  // virtual registers have been assigned to a register bank.
141  // Selected: In GlobalISel: the InstructionSelect pass ran and all pre-isel
142  // generic instructions have been eliminated; i.e., all instructions are now
143  // target-specific or non-pre-isel generic instructions (e.g., COPY).
144  // Since only pre-isel generic instructions can have generic virtual register
145  // operands, this also means that all generic virtual registers have been
146  // constrained to virtual registers (assigned to register classes) and that
147  // all sizes attached to them have been eliminated.
148  enum class Property : unsigned {
149  IsSSA,
150  NoPHIs,
151  TracksLiveness,
152  NoVRegs,
153  FailedISel,
154  Legalized,
155  RegBankSelected,
156  Selected,
157  LastProperty = Selected,
158  };
159 
160  bool hasProperty(Property P) const {
161  return Properties[static_cast<unsigned>(P)];
162  }
163 
165  Properties.set(static_cast<unsigned>(P));
166  return *this;
167  }
168 
170  Properties.reset(static_cast<unsigned>(P));
171  return *this;
172  }
173 
174  /// Reset all the properties.
176  Properties.reset();
177  return *this;
178  }
179 
181  Properties |= MFP.Properties;
182  return *this;
183  }
184 
186  Properties.reset(MFP.Properties);
187  return *this;
188  }
189 
190  // Returns true if all properties set in V (i.e. required by a pass) are set
191  // in this.
193  return !V.Properties.test(Properties);
194  }
195 
196  /// Print the MachineFunctionProperties in human-readable form.
197  void print(raw_ostream &OS) const;
198 
199 private:
200  BitVector Properties =
201  BitVector(static_cast<unsigned>(Property::LastProperty)+1);
202 };
203 
204 struct SEHHandler {
205  /// Filter or finally function. Null indicates a catch-all.
207 
208  /// Address of block to recover at. Null for a finally handler.
210 };
211 
212 /// This structure is used to retain landing pad info for the current function.
214  MachineBasicBlock *LandingPadBlock; // Landing pad block.
215  SmallVector<MCSymbol *, 1> BeginLabels; // Labels prior to invoke.
216  SmallVector<MCSymbol *, 1> EndLabels; // Labels after invoke.
217  SmallVector<SEHHandler, 1> SEHHandlers; // SEH handlers active at this lpad.
218  MCSymbol *LandingPadLabel = nullptr; // Label at beginning of landing pad.
219  std::vector<int> TypeIds; // List of type ids (filters negative).
220 
222  : LandingPadBlock(MBB) {}
223 };
224 
226  const Function &F;
227  const LLVMTargetMachine &Target;
228  const TargetSubtargetInfo *STI;
229  MCContext &Ctx;
230  MachineModuleInfo &MMI;
231 
232  // RegInfo - Information about each register in use in the function.
233  MachineRegisterInfo *RegInfo;
234 
235  // Used to keep track of target-specific per-machine function information for
236  // the target implementation.
237  MachineFunctionInfo *MFInfo;
238 
239  // Keep track of objects allocated on the stack.
240  MachineFrameInfo *FrameInfo;
241 
242  // Keep track of constants which are spilled to memory
244 
245  // Keep track of jump tables for switch instructions
246  MachineJumpTableInfo *JumpTableInfo;
247 
248  // Keeps track of Wasm exception handling related data. This will be null for
249  // functions that aren't using a wasm EH personality.
250  WasmEHFuncInfo *WasmEHInfo = nullptr;
251 
252  // Keeps track of Windows exception handling related data. This will be null
253  // for functions that aren't using a funclet-based EH personality.
254  WinEHFuncInfo *WinEHInfo = nullptr;
255 
256  // Function-level unique numbering for MachineBasicBlocks. When a
257  // MachineBasicBlock is inserted into a MachineFunction is it automatically
258  // numbered and this vector keeps track of the mapping from ID's to MBB's.
259  std::vector<MachineBasicBlock*> MBBNumbering;
260 
261  // Pool-allocate MachineFunction-lifetime and IR objects.
263 
264  // Allocation management for instructions in function.
265  Recycler<MachineInstr> InstructionRecycler;
266 
267  // Allocation management for operand arrays on instructions.
268  ArrayRecycler<MachineOperand> OperandRecycler;
269 
270  // Allocation management for basic blocks in function.
271  Recycler<MachineBasicBlock> BasicBlockRecycler;
272 
273  // List of machine basic blocks in function
275  BasicBlockListType BasicBlocks;
276 
277  /// FunctionNumber - This provides a unique ID for each function emitted in
278  /// this translation unit.
279  ///
280  unsigned FunctionNumber;
281 
282  /// Alignment - The alignment of the function.
283  unsigned Alignment;
284 
285  /// ExposesReturnsTwice - True if the function calls setjmp or related
286  /// functions with attribute "returns twice", but doesn't have
287  /// the attribute itself.
288  /// This is used to limit optimizations which cannot reason
289  /// about the control flow of such functions.
290  bool ExposesReturnsTwice = false;
291 
292  /// True if the function includes any inline assembly.
293  bool HasInlineAsm = false;
294 
295  /// True if any WinCFI instruction have been emitted in this function.
296  bool HasWinCFI = false;
297 
298  /// Current high-level properties of the IR of the function (e.g. is in SSA
299  /// form or whether registers have been allocated)
300  MachineFunctionProperties Properties;
301 
302  // Allocation management for pseudo source values.
303  std::unique_ptr<PseudoSourceValueManager> PSVManager;
304 
305  /// List of moves done by a function's prolog. Used to construct frame maps
306  /// by debug and exception handling consumers.
307  std::vector<MCCFIInstruction> FrameInstructions;
308 
309  /// \name Exception Handling
310  /// \{
311 
312  /// List of LandingPadInfo describing the landing pad information.
313  std::vector<LandingPadInfo> LandingPads;
314 
315  /// Map a landing pad's EH symbol to the call site indexes.
317 
318  /// Map a landing pad to its index.
320 
321  /// Map of invoke call site index values to associated begin EH_LABEL.
322  DenseMap<MCSymbol*, unsigned> CallSiteMap;
323 
324  /// CodeView label annotations.
325  std::vector<std::pair<MCSymbol *, MDNode *>> CodeViewAnnotations;
326 
327  bool CallsEHReturn = false;
328  bool CallsUnwindInit = false;
329  bool HasEHScopes = false;
330  bool HasEHFunclets = false;
331 
332  /// List of C++ TypeInfo used.
333  std::vector<const GlobalValue *> TypeInfos;
334 
335  /// List of typeids encoding filters used.
336  std::vector<unsigned> FilterIds;
337 
338  /// List of the indices in FilterIds corresponding to filter terminators.
339  std::vector<unsigned> FilterEnds;
340 
341  EHPersonality PersonalityTypeCache = EHPersonality::Unknown;
342 
343  /// \}
344 
345  /// Clear all the members of this MachineFunction, but the ones used
346  /// to initialize again the MachineFunction.
347  /// More specifically, this deallocates all the dynamically allocated
348  /// objects and get rid of all the XXXInfo data structure, but keep
349  /// unchanged the references to Fn, Target, MMI, and FunctionNumber.
350  void clear();
351  /// Allocate and initialize the different members.
352  /// In particular, the XXXInfo data structure.
353  /// \pre Fn, Target, MMI, and FunctionNumber are properly set.
354  void init();
355 
356 public:
360  // The Slot can be negative for fixed stack objects.
361  int Slot;
362  const DILocation *Loc;
363 
365  int Slot, const DILocation *Loc)
366  : Var(Var), Expr(Expr), Slot(Slot), Loc(Loc) {}
367  };
368 
369  class Delegate {
370  virtual void anchor();
371 
372  public:
373  virtual ~Delegate() = default;
374  /// Callback after an insertion. This should not modify the MI directly.
375  virtual void MF_HandleInsertion(MachineInstr &MI) = 0;
376  /// Callback before a removal. This should not modify the MI directly.
377  virtual void MF_HandleRemoval(MachineInstr &MI) = 0;
378  };
379 
380 private:
381  Delegate *TheDelegate = nullptr;
382 
383  // Callbacks for insertion and removal.
384  void handleInsertion(MachineInstr &MI);
385  void handleRemoval(MachineInstr &MI);
386  friend struct ilist_traits<MachineInstr>;
387 
388 public:
391 
392  MachineFunction(const Function &F, const LLVMTargetMachine &Target,
393  const TargetSubtargetInfo &STI, unsigned FunctionNum,
394  MachineModuleInfo &MMI);
395  MachineFunction(const MachineFunction &) = delete;
396  MachineFunction &operator=(const MachineFunction &) = delete;
397  ~MachineFunction();
398 
399  /// Reset the instance as if it was just created.
400  void reset() {
401  clear();
402  init();
403  }
404 
405  /// Reset the currently registered delegate - otherwise assert.
406  void resetDelegate(Delegate *delegate) {
407  assert(TheDelegate == delegate &&
408  "Only the current delegate can perform reset!");
409  TheDelegate = nullptr;
410  }
411 
412  /// Set the delegate. resetDelegate must be called before attempting
413  /// to set.
414  void setDelegate(Delegate *delegate) {
415  assert(delegate && !TheDelegate &&
416  "Attempted to set delegate to null, or to change it without "
417  "first resetting it!");
418 
419  TheDelegate = delegate;
420  }
421 
422  MachineModuleInfo &getMMI() const { return MMI; }
423  MCContext &getContext() const { return Ctx; }
424 
425  PseudoSourceValueManager &getPSVManager() const { return *PSVManager; }
426 
427  /// Return the DataLayout attached to the Module associated to this MF.
428  const DataLayout &getDataLayout() const;
429 
430  /// Return the LLVM function that this machine code represents
431  const Function &getFunction() const { return F; }
432 
433  /// getName - Return the name of the corresponding LLVM function.
434  StringRef getName() const;
435 
436  /// getFunctionNumber - Return a unique ID for the current function.
437  unsigned getFunctionNumber() const { return FunctionNumber; }
438 
439  /// getTarget - Return the target machine this machine code is compiled with
440  const LLVMTargetMachine &getTarget() const { return Target; }
441 
442  /// getSubtarget - Return the subtarget for which this machine code is being
443  /// compiled.
444  const TargetSubtargetInfo &getSubtarget() const { return *STI; }
445  void setSubtarget(const TargetSubtargetInfo *ST) { STI = ST; }
446 
447  /// getSubtarget - This method returns a pointer to the specified type of
448  /// TargetSubtargetInfo. In debug builds, it verifies that the object being
449  /// returned is of the correct type.
450  template<typename STC> const STC &getSubtarget() const {
451  return *static_cast<const STC *>(STI);
452  }
453 
454  /// getRegInfo - Return information about the registers currently in use.
455  MachineRegisterInfo &getRegInfo() { return *RegInfo; }
456  const MachineRegisterInfo &getRegInfo() const { return *RegInfo; }
457 
458  /// getFrameInfo - Return the frame info object for the current function.
459  /// This object contains information about objects allocated on the stack
460  /// frame of the current function in an abstract way.
461  MachineFrameInfo &getFrameInfo() { return *FrameInfo; }
462  const MachineFrameInfo &getFrameInfo() const { return *FrameInfo; }
463 
464  /// getJumpTableInfo - Return the jump table info object for the current
465  /// function. This object contains information about jump tables in the
466  /// current function. If the current function has no jump tables, this will
467  /// return null.
468  const MachineJumpTableInfo *getJumpTableInfo() const { return JumpTableInfo; }
469  MachineJumpTableInfo *getJumpTableInfo() { return JumpTableInfo; }
470 
471  /// getOrCreateJumpTableInfo - Get the JumpTableInfo for this function, if it
472  /// does already exist, allocate one.
473  MachineJumpTableInfo *getOrCreateJumpTableInfo(unsigned JTEntryKind);
474 
475  /// getConstantPool - Return the constant pool object for the current
476  /// function.
479 
480  /// getWasmEHFuncInfo - Return information about how the current function uses
481  /// Wasm exception handling. Returns null for functions that don't use wasm
482  /// exception handling.
483  const WasmEHFuncInfo *getWasmEHFuncInfo() const { return WasmEHInfo; }
484  WasmEHFuncInfo *getWasmEHFuncInfo() { return WasmEHInfo; }
485 
486  /// getWinEHFuncInfo - Return information about how the current function uses
487  /// Windows exception handling. Returns null for functions that don't use
488  /// funclets for exception handling.
489  const WinEHFuncInfo *getWinEHFuncInfo() const { return WinEHInfo; }
490  WinEHFuncInfo *getWinEHFuncInfo() { return WinEHInfo; }
491 
492  /// getAlignment - Return the alignment (log2, not bytes) of the function.
493  unsigned getAlignment() const { return Alignment; }
494 
495  /// setAlignment - Set the alignment (log2, not bytes) of the function.
496  void setAlignment(unsigned A) { Alignment = A; }
497 
498  /// ensureAlignment - Make sure the function is at least 1 << A bytes aligned.
499  void ensureAlignment(unsigned A) {
500  if (Alignment < A) Alignment = A;
501  }
502 
503  /// exposesReturnsTwice - Returns true if the function calls setjmp or
504  /// any other similar functions with attribute "returns twice" without
505  /// having the attribute itself.
506  bool exposesReturnsTwice() const {
507  return ExposesReturnsTwice;
508  }
509 
510  /// setCallsSetJmp - Set a flag that indicates if there's a call to
511  /// a "returns twice" function.
513  ExposesReturnsTwice = B;
514  }
515 
516  /// Returns true if the function contains any inline assembly.
517  bool hasInlineAsm() const {
518  return HasInlineAsm;
519  }
520 
521  /// Set a flag that indicates that the function contains inline assembly.
522  void setHasInlineAsm(bool B) {
523  HasInlineAsm = B;
524  }
525 
526  bool hasWinCFI() const {
527  return HasWinCFI;
528  }
529  void setHasWinCFI(bool v) { HasWinCFI = v; }
530 
531  /// Get the function properties
532  const MachineFunctionProperties &getProperties() const { return Properties; }
533  MachineFunctionProperties &getProperties() { return Properties; }
534 
535  /// getInfo - Keep track of various per-function pieces of information for
536  /// backends that would like to do so.
537  ///
538  template<typename Ty>
539  Ty *getInfo() {
540  if (!MFInfo)
541  MFInfo = Ty::template create<Ty>(Allocator, *this);
542  return static_cast<Ty*>(MFInfo);
543  }
544 
545  template<typename Ty>
546  const Ty *getInfo() const {
547  return const_cast<MachineFunction*>(this)->getInfo<Ty>();
548  }
549 
550  /// getBlockNumbered - MachineBasicBlocks are automatically numbered when they
551  /// are inserted into the machine function. The block number for a machine
552  /// basic block can be found by using the MBB::getNumber method, this method
553  /// provides the inverse mapping.
555  assert(N < MBBNumbering.size() && "Illegal block number");
556  assert(MBBNumbering[N] && "Block was removed from the machine function!");
557  return MBBNumbering[N];
558  }
559 
560  /// Should we be emitting segmented stack stuff for the function
561  bool shouldSplitStack() const;
562 
563  /// getNumBlockIDs - Return the number of MBB ID's allocated.
564  unsigned getNumBlockIDs() const { return (unsigned)MBBNumbering.size(); }
565 
566  /// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
567  /// recomputes them. This guarantees that the MBB numbers are sequential,
568  /// dense, and match the ordering of the blocks within the function. If a
569  /// specific MachineBasicBlock is specified, only that block and those after
570  /// it are renumbered.
571  void RenumberBlocks(MachineBasicBlock *MBBFrom = nullptr);
572 
573  /// print - Print out the MachineFunction in a format suitable for debugging
574  /// to the specified stream.
575  void print(raw_ostream &OS, const SlotIndexes* = nullptr) const;
576 
577  /// viewCFG - This function is meant for use from the debugger. You can just
578  /// say 'call F->viewCFG()' and a ghostview window should pop up from the
579  /// program, displaying the CFG of the current function with the code for each
580  /// basic block inside. This depends on there being a 'dot' and 'gv' program
581  /// in your path.
582  void viewCFG() const;
583 
584  /// viewCFGOnly - This function is meant for use from the debugger. It works
585  /// just like viewCFG, but it does not include the contents of basic blocks
586  /// into the nodes, just the label. If you are only interested in the CFG
587  /// this can make the graph smaller.
588  ///
589  void viewCFGOnly() const;
590 
591  /// dump - Print the current MachineFunction to cerr, useful for debugger use.
592  void dump() const;
593 
594  /// Run the current MachineFunction through the machine code verifier, useful
595  /// for debugger use.
596  /// \returns true if no problems were found.
597  bool verify(Pass *p = nullptr, const char *Banner = nullptr,
598  bool AbortOnError = true) const;
599 
600  // Provide accessors for the MachineBasicBlock list...
601  using iterator = BasicBlockListType::iterator;
605 
606  /// Support for MachineBasicBlock::getNextNode().
609  return &MachineFunction::BasicBlocks;
610  }
611 
612  /// addLiveIn - Add the specified physical register as a live-in value and
613  /// create a corresponding virtual register for it.
614  unsigned addLiveIn(unsigned PReg, const TargetRegisterClass *RC);
615 
616  //===--------------------------------------------------------------------===//
617  // BasicBlock accessor functions.
618  //
619  iterator begin() { return BasicBlocks.begin(); }
620  const_iterator begin() const { return BasicBlocks.begin(); }
621  iterator end () { return BasicBlocks.end(); }
622  const_iterator end () const { return BasicBlocks.end(); }
623 
624  reverse_iterator rbegin() { return BasicBlocks.rbegin(); }
625  const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
626  reverse_iterator rend () { return BasicBlocks.rend(); }
627  const_reverse_iterator rend () const { return BasicBlocks.rend(); }
628 
629  unsigned size() const { return (unsigned)BasicBlocks.size();}
630  bool empty() const { return BasicBlocks.empty(); }
631  const MachineBasicBlock &front() const { return BasicBlocks.front(); }
632  MachineBasicBlock &front() { return BasicBlocks.front(); }
633  const MachineBasicBlock & back() const { return BasicBlocks.back(); }
634  MachineBasicBlock & back() { return BasicBlocks.back(); }
635 
636  void push_back (MachineBasicBlock *MBB) { BasicBlocks.push_back (MBB); }
637  void push_front(MachineBasicBlock *MBB) { BasicBlocks.push_front(MBB); }
638  void insert(iterator MBBI, MachineBasicBlock *MBB) {
639  BasicBlocks.insert(MBBI, MBB);
640  }
641  void splice(iterator InsertPt, iterator MBBI) {
642  BasicBlocks.splice(InsertPt, BasicBlocks, MBBI);
643  }
644  void splice(iterator InsertPt, MachineBasicBlock *MBB) {
645  BasicBlocks.splice(InsertPt, BasicBlocks, MBB);
646  }
647  void splice(iterator InsertPt, iterator MBBI, iterator MBBE) {
648  BasicBlocks.splice(InsertPt, BasicBlocks, MBBI, MBBE);
649  }
650 
651  void remove(iterator MBBI) { BasicBlocks.remove(MBBI); }
652  void remove(MachineBasicBlock *MBBI) { BasicBlocks.remove(MBBI); }
653  void erase(iterator MBBI) { BasicBlocks.erase(MBBI); }
654  void erase(MachineBasicBlock *MBBI) { BasicBlocks.erase(MBBI); }
655 
656  template <typename Comp>
657  void sort(Comp comp) {
658  BasicBlocks.sort(comp);
659  }
660 
661  /// Return the number of \p MachineInstrs in this \p MachineFunction.
662  unsigned getInstructionCount() const {
663  unsigned InstrCount = 0;
664  for (const MachineBasicBlock &MBB : BasicBlocks)
665  InstrCount += MBB.size();
666  return InstrCount;
667  }
668 
669  //===--------------------------------------------------------------------===//
670  // Internal functions used to automatically number MachineBasicBlocks
671 
672  /// Adds the MBB to the internal numbering. Returns the unique number
673  /// assigned to the MBB.
675  MBBNumbering.push_back(MBB);
676  return (unsigned)MBBNumbering.size()-1;
677  }
678 
679  /// removeFromMBBNumbering - Remove the specific machine basic block from our
680  /// tracker, this is only really to be used by the MachineBasicBlock
681  /// implementation.
682  void removeFromMBBNumbering(unsigned N) {
683  assert(N < MBBNumbering.size() && "Illegal basic block #");
684  MBBNumbering[N] = nullptr;
685  }
686 
687  /// CreateMachineInstr - Allocate a new MachineInstr. Use this instead
688  /// of `new MachineInstr'.
689  MachineInstr *CreateMachineInstr(const MCInstrDesc &MCID, const DebugLoc &DL,
690  bool NoImp = false);
691 
692  /// Create a new MachineInstr which is a copy of \p Orig, identical in all
693  /// ways except the instruction has no parent, prev, or next. Bundling flags
694  /// are reset.
695  ///
696  /// Note: Clones a single instruction, not whole instruction bundles.
697  /// Does not perform target specific adjustments; consider using
698  /// TargetInstrInfo::duplicate() instead.
699  MachineInstr *CloneMachineInstr(const MachineInstr *Orig);
700 
701  /// Clones instruction or the whole instruction bundle \p Orig and insert
702  /// into \p MBB before \p InsertBefore.
703  ///
704  /// Note: Does not perform target specific adjustments; consider using
705  /// TargetInstrInfo::duplicate() intead.
706  MachineInstr &CloneMachineInstrBundle(MachineBasicBlock &MBB,
707  MachineBasicBlock::iterator InsertBefore, const MachineInstr &Orig);
708 
709  /// DeleteMachineInstr - Delete the given MachineInstr.
710  void DeleteMachineInstr(MachineInstr *MI);
711 
712  /// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this
713  /// instead of `new MachineBasicBlock'.
714  MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = nullptr);
715 
716  /// DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
717  void DeleteMachineBasicBlock(MachineBasicBlock *MBB);
718 
719  /// getMachineMemOperand - Allocate a new MachineMemOperand.
720  /// MachineMemOperands are owned by the MachineFunction and need not be
721  /// explicitly deallocated.
722  MachineMemOperand *getMachineMemOperand(
723  MachinePointerInfo PtrInfo, MachineMemOperand::Flags f, uint64_t s,
724  unsigned base_alignment, const AAMDNodes &AAInfo = AAMDNodes(),
725  const MDNode *Ranges = nullptr,
728  AtomicOrdering FailureOrdering = AtomicOrdering::NotAtomic);
729 
730  /// getMachineMemOperand - Allocate a new MachineMemOperand by copying
731  /// an existing one, adjusting by an offset and using the given size.
732  /// MachineMemOperands are owned by the MachineFunction and need not be
733  /// explicitly deallocated.
734  MachineMemOperand *getMachineMemOperand(const MachineMemOperand *MMO,
735  int64_t Offset, uint64_t Size);
736 
737  /// Allocate a new MachineMemOperand by copying an existing one,
738  /// replacing only AliasAnalysis information. MachineMemOperands are owned
739  /// by the MachineFunction and need not be explicitly deallocated.
740  MachineMemOperand *getMachineMemOperand(const MachineMemOperand *MMO,
741  const AAMDNodes &AAInfo);
742 
744 
745  /// Allocate an array of MachineOperands. This is only intended for use by
746  /// internal MachineInstr functions.
748  return OperandRecycler.allocate(Cap, Allocator);
749  }
750 
751  /// Dellocate an array of MachineOperands and recycle the memory. This is
752  /// only intended for use by internal MachineInstr functions.
753  /// Cap must be the same capacity that was used to allocate the array.
755  OperandRecycler.deallocate(Cap, Array);
756  }
757 
758  /// Allocate and initialize a register mask with @p NumRegister bits.
759  uint32_t *allocateRegMask();
760 
761  /// Allocate and construct an extra info structure for a `MachineInstr`.
762  ///
763  /// This is allocated on the function's allocator and so lives the life of
764  /// the function.
765  MachineInstr::ExtraInfo *
766  createMIExtraInfo(ArrayRef<MachineMemOperand *> MMOs,
767  MCSymbol *PreInstrSymbol = nullptr,
768  MCSymbol *PostInstrSymbol = nullptr);
769 
770  /// Allocate a string and populate it with the given external symbol name.
771  const char *createExternalSymbolName(StringRef Name);
772 
773  //===--------------------------------------------------------------------===//
774  // Label Manipulation.
775 
776  /// getJTISymbol - Return the MCSymbol for the specified non-empty jump table.
777  /// If isLinkerPrivate is specified, an 'l' label is returned, otherwise a
778  /// normal 'L' label is returned.
779  MCSymbol *getJTISymbol(unsigned JTI, MCContext &Ctx,
780  bool isLinkerPrivate = false) const;
781 
782  /// getPICBaseSymbol - Return a function-local symbol to represent the PIC
783  /// base.
784  MCSymbol *getPICBaseSymbol() const;
785 
786  /// Returns a reference to a list of cfi instructions in the function's
787  /// prologue. Used to construct frame maps for debug and exception handling
788  /// comsumers.
789  const std::vector<MCCFIInstruction> &getFrameInstructions() const {
790  return FrameInstructions;
791  }
792 
794  FrameInstructions.push_back(Inst);
795  return FrameInstructions.size() - 1;
796  }
797 
798  /// \name Exception Handling
799  /// \{
800 
801  bool callsEHReturn() const { return CallsEHReturn; }
802  void setCallsEHReturn(bool b) { CallsEHReturn = b; }
803 
804  bool callsUnwindInit() const { return CallsUnwindInit; }
805  void setCallsUnwindInit(bool b) { CallsUnwindInit = b; }
806 
807  bool hasEHScopes() const { return HasEHScopes; }
808  void setHasEHScopes(bool V) { HasEHScopes = V; }
809 
810  bool hasEHFunclets() const { return HasEHFunclets; }
811  void setHasEHFunclets(bool V) { HasEHFunclets = V; }
812 
813  /// Find or create an LandingPadInfo for the specified MachineBasicBlock.
814  LandingPadInfo &getOrCreateLandingPadInfo(MachineBasicBlock *LandingPad);
815 
816  /// Remap landing pad labels and remove any deleted landing pads.
817  void tidyLandingPads(DenseMap<MCSymbol *, uintptr_t> *LPMap = nullptr,
818  bool TidyIfNoBeginLabels = true);
819 
820  /// Return a reference to the landing pad info for the current function.
821  const std::vector<LandingPadInfo> &getLandingPads() const {
822  return LandingPads;
823  }
824 
825  /// Provide the begin and end labels of an invoke style call and associate it
826  /// with a try landing pad block.
827  void addInvoke(MachineBasicBlock *LandingPad,
828  MCSymbol *BeginLabel, MCSymbol *EndLabel);
829 
830  /// Add a new panding pad, and extract the exception handling information from
831  /// the landingpad instruction. Returns the label ID for the landing pad
832  /// entry.
833  MCSymbol *addLandingPad(MachineBasicBlock *LandingPad);
834 
835  /// Provide the catch typeinfo for a landing pad.
836  void addCatchTypeInfo(MachineBasicBlock *LandingPad,
838 
839  /// Provide the filter typeinfo for a landing pad.
840  void addFilterTypeInfo(MachineBasicBlock *LandingPad,
842 
843  /// Add a cleanup action for a landing pad.
844  void addCleanup(MachineBasicBlock *LandingPad);
845 
846  void addSEHCatchHandler(MachineBasicBlock *LandingPad, const Function *Filter,
847  const BlockAddress *RecoverBA);
848 
849  void addSEHCleanupHandler(MachineBasicBlock *LandingPad,
850  const Function *Cleanup);
851 
852  /// Return the type id for the specified typeinfo. This is function wide.
853  unsigned getTypeIDFor(const GlobalValue *TI);
854 
855  /// Return the id of the filter encoded by TyIds. This is function wide.
856  int getFilterIDFor(std::vector<unsigned> &TyIds);
857 
858  /// Map the landing pad's EH symbol to the call site indexes.
859  void setCallSiteLandingPad(MCSymbol *Sym, ArrayRef<unsigned> Sites);
860 
861  /// Map the landing pad to its index. Used for Wasm exception handling.
862  void setWasmLandingPadIndex(const MachineBasicBlock *LPad, unsigned Index) {
863  WasmLPadToIndexMap[LPad] = Index;
864  }
865 
866  /// Returns true if the landing pad has an associate index in wasm EH.
867  bool hasWasmLandingPadIndex(const MachineBasicBlock *LPad) const {
868  return WasmLPadToIndexMap.count(LPad);
869  }
870 
871  /// Get the index in wasm EH for a given landing pad.
872  unsigned getWasmLandingPadIndex(const MachineBasicBlock *LPad) const {
873  assert(hasWasmLandingPadIndex(LPad));
874  return WasmLPadToIndexMap.lookup(LPad);
875  }
876 
877  /// Get the call site indexes for a landing pad EH symbol.
879  assert(hasCallSiteLandingPad(Sym) &&
880  "missing call site number for landing pad!");
881  return LPadToCallSiteMap[Sym];
882  }
883 
884  /// Return true if the landing pad Eh symbol has an associated call site.
886  return !LPadToCallSiteMap[Sym].empty();
887  }
888 
889  /// Map the begin label for a call site.
890  void setCallSiteBeginLabel(MCSymbol *BeginLabel, unsigned Site) {
891  CallSiteMap[BeginLabel] = Site;
892  }
893 
894  /// Get the call site number for a begin label.
895  unsigned getCallSiteBeginLabel(MCSymbol *BeginLabel) const {
896  assert(hasCallSiteBeginLabel(BeginLabel) &&
897  "Missing call site number for EH_LABEL!");
898  return CallSiteMap.lookup(BeginLabel);
899  }
900 
901  /// Return true if the begin label has a call site number associated with it.
902  bool hasCallSiteBeginLabel(MCSymbol *BeginLabel) const {
903  return CallSiteMap.count(BeginLabel);
904  }
905 
906  /// Record annotations associated with a particular label.
908  CodeViewAnnotations.push_back({Label, MD});
909  }
910 
912  return CodeViewAnnotations;
913  }
914 
915  /// Return a reference to the C++ typeinfo for the current function.
916  const std::vector<const GlobalValue *> &getTypeInfos() const {
917  return TypeInfos;
918  }
919 
920  /// Return a reference to the typeids encoding filters used in the current
921  /// function.
922  const std::vector<unsigned> &getFilterIds() const {
923  return FilterIds;
924  }
925 
926  /// \}
927 
928  /// Collect information used to emit debugging information of a variable.
929  void setVariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
930  int Slot, const DILocation *Loc) {
931  VariableDbgInfos.emplace_back(Var, Expr, Slot, Loc);
932  }
933 
934  VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfos; }
936  return VariableDbgInfos;
937  }
938 };
939 
940 //===--------------------------------------------------------------------===//
941 // GraphTraits specializations for function basic block graphs (CFGs)
942 //===--------------------------------------------------------------------===//
943 
944 // Provide specializations of GraphTraits to be able to treat a
945 // machine function as a graph of machine basic blocks... these are
946 // the same as the machine basic block iterators, except that the root
947 // node is implicitly the first node of the function.
948 //
949 template <> struct GraphTraits<MachineFunction*> :
951  static NodeRef getEntryNode(MachineFunction *F) { return &F->front(); }
952 
953  // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
955 
957  return nodes_iterator(F->begin());
958  }
959 
961  return nodes_iterator(F->end());
962  }
963 
964  static unsigned size (MachineFunction *F) { return F->size(); }
965 };
966 template <> struct GraphTraits<const MachineFunction*> :
968  static NodeRef getEntryNode(const MachineFunction *F) { return &F->front(); }
969 
970  // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
972 
974  return nodes_iterator(F->begin());
975  }
976 
978  return nodes_iterator(F->end());
979  }
980 
981  static unsigned size (const MachineFunction *F) {
982  return F->size();
983  }
984 };
985 
986 // Provide specializations of GraphTraits to be able to treat a function as a
987 // graph of basic blocks... and to walk it in inverse order. Inverse order for
988 // a function is considered to be when traversing the predecessor edges of a BB
989 // instead of the successor edges.
990 //
991 template <> struct GraphTraits<Inverse<MachineFunction*>> :
994  return &G.Graph->front();
995  }
996 };
997 template <> struct GraphTraits<Inverse<const MachineFunction*>> :
1000  return &G.Graph->front();
1001  }
1002 };
1003 
1004 } // end namespace llvm
1005 
1006 #endif // LLVM_CODEGEN_MACHINEFUNCTION_H
void push_front(MachineBasicBlock *MBB)
Pass interface - Implemented by all &#39;passes&#39;.
Definition: Pass.h:80
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:110
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:265
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:23
MachineFunctionProperties & reset(Property P)
Various leaf nodes.
Definition: ISDOpcodes.h:59
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:41
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
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:163
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:501
Template traits for intrusive list.
Definition: ilist.h:89
void sort(Comp comp)
A debug info location.
Definition: DebugLoc.h:33
Metadata node.
Definition: Metadata.h:863
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...
The address of a basic block.
Definition: Constants.h:839
A description of a memory reference used in the backend.
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:62
This structure is used to retain landing pad info for the current function.
SlotIndexes pass.
Definition: SlotIndexes.h:328
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:32
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:40
void setHasEHScopes(bool V)
void setDelegate(Delegate *delegate)
Set the delegate.
#define P(N)
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:422
typename MachineBasicBlock *::UnknownGraphTypeError NodeRef
Definition: GraphTraits.h:78
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:57
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:140
void push_front(pointer val)
Definition: ilist.h:310
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:214
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:327
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:388
This class contains a discriminated union of information about pointers in memory operands...
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:96
Recycler - This class manages a linked-list of deallocated nodes and facilitates reusing deallocated ...
Definition: Recycler.h:34
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:839
unsigned getWasmLandingPadIndex(const MachineBasicBlock *LPad) const
Get the index in wasm EH for a given landing pad.
const DataFlowGraph & G
Definition: RDFGraph.cpp:210
A collection of metadata nodes that might be associated with a memory access used by the alias-analys...
Definition: Metadata.h:643
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:41
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:311
static void clear(coro::Shape &Shape)
Definition: Coroutines.cpp:211
static unsigned size(MachineFunction *F)
MachineBasicBlock * LandingPadBlock
FunctionNumber(functionNumber)
Definition: LLParser.cpp:2736
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:63
pointer remove(iterator &IT)
Definition: ilist.h:249
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:226
static unsigned size(const MachineFunction *F)
void emplace_back(ArgTypes &&... Args)
Definition: SmallVector.h:644
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:46
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
#define LLVM_NODISCARD
LLVM_NODISCARD - Warn if a type or return value is discarded.
Definition: Compiler.h:128
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:58
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:45
Callbacks do nothing by default in iplist and ilist.
Definition: ilist.h:64
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:48
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.