LLVM API Documentation

 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
Function.h
Go to the documentation of this file.
1 //===-- llvm/Function.h - Class to represent a single function --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the declaration of the Function class, which represents a
11 // single function/procedure in LLVM.
12 //
13 // A function basically consists of a list of basic blocks, a list of arguments,
14 // and a symbol table.
15 //
16 //===----------------------------------------------------------------------===//
17 
18 #ifndef LLVM_IR_FUNCTION_H
19 #define LLVM_IR_FUNCTION_H
20 
21 #include "llvm/IR/Argument.h"
22 #include "llvm/IR/Attributes.h"
23 #include "llvm/IR/BasicBlock.h"
24 #include "llvm/IR/CallingConv.h"
25 #include "llvm/IR/GlobalValue.h"
26 #include "llvm/Support/Compiler.h"
27 
28 namespace llvm {
29 
30 class FunctionType;
31 class LLVMContext;
32 
33 // Traits for intrusive list of basic blocks...
34 template<> struct ilist_traits<BasicBlock>
35  : public SymbolTableListTraits<BasicBlock, Function> {
36 
37  // createSentinel is used to get hold of the node that marks the end of the
38  // list... (same trick used here as in ilist_traits<Instruction>)
40  return static_cast<BasicBlock*>(&Sentinel);
41  }
42  static void destroySentinel(BasicBlock*) {}
43 
46  static void noteHead(BasicBlock*, BasicBlock*) {}
47 
48  static ValueSymbolTable *getSymTab(Function *ItemParent);
49 private:
50  mutable ilist_half_node<BasicBlock> Sentinel;
51 };
52 
53 template<> struct ilist_traits<Argument>
54  : public SymbolTableListTraits<Argument, Function> {
55 
57  return static_cast<Argument*>(&Sentinel);
58  }
59  static void destroySentinel(Argument*) {}
60 
62  Argument *ensureHead(Argument*) const { return createSentinel(); }
63  static void noteHead(Argument*, Argument*) {}
64 
65  static ValueSymbolTable *getSymTab(Function *ItemParent);
66 private:
67  mutable ilist_half_node<Argument> Sentinel;
68 };
69 
70 class Function : public GlobalValue,
71  public ilist_node<Function> {
72 public:
75 
76  // BasicBlock iterators...
79 
82 
83 private:
84  // Important things that make up a function!
85  BasicBlockListType BasicBlocks; ///< The basic blocks
86  mutable ArgumentListType ArgumentList; ///< The formal arguments
87  ValueSymbolTable *SymTab; ///< Symbol table of args/instructions
88  AttributeSet AttributeSets; ///< Parameter attributes
89 
90  // HasLazyArguments is stored in Value::SubclassData.
91  /*bool HasLazyArguments;*/
92 
93  // The Calling Convention is stored in Value::SubclassData.
94  /*CallingConv::ID CallingConvention;*/
95 
97 
98  void setParent(Module *parent);
99 
100  /// hasLazyArguments/CheckLazyArguments - The argument list of a function is
101  /// built on demand, so that the list isn't allocated until the first client
102  /// needs it. The hasLazyArguments predicate returns true if the arg list
103  /// hasn't been set up yet.
104  bool hasLazyArguments() const {
105  return getSubclassDataFromValue() & 1;
106  }
107  void CheckLazyArguments() const {
108  if (hasLazyArguments())
109  BuildLazyArguments();
110  }
111  void BuildLazyArguments() const;
112 
113  Function(const Function&) LLVM_DELETED_FUNCTION;
114  void operator=(const Function&) LLVM_DELETED_FUNCTION;
115 
116  /// Do the actual lookup of an intrinsic ID when the query could not be
117  /// answered from the cache.
118  unsigned lookupIntrinsicID() const LLVM_READONLY;
119 
120  /// Function ctor - If the (optional) Module argument is specified, the
121  /// function is automatically inserted into the end of the function list for
122  /// the module.
123  ///
124  Function(FunctionType *Ty, LinkageTypes Linkage,
125  const Twine &N = "", Module *M = 0);
126 
127 public:
128  static Function *Create(FunctionType *Ty, LinkageTypes Linkage,
129  const Twine &N = "", Module *M = 0) {
130  return new(0) Function(Ty, Linkage, N, M);
131  }
132 
133  ~Function();
134 
135  Type *getReturnType() const; // Return the type of the ret val
136  FunctionType *getFunctionType() const; // Return the FunctionType for me
137 
138  /// getContext - Return a pointer to the LLVMContext associated with this
139  /// function, or NULL if this function is not bound to a context yet.
140  LLVMContext &getContext() const;
141 
142  /// isVarArg - Return true if this function takes a variable number of
143  /// arguments.
144  bool isVarArg() const;
145 
146  /// getIntrinsicID - This method returns the ID number of the specified
147  /// function, or Intrinsic::not_intrinsic if the function is not an
148  /// intrinsic, or if the pointer is null. This value is always defined to be
149  /// zero to allow easy checking for whether a function is intrinsic or not.
150  /// The particular intrinsic functions which correspond to this value are
151  /// defined in llvm/Intrinsics.h. Results are cached in the LLVM context,
152  /// subsequent requests for the same ID return results much faster from the
153  /// cache.
154  ///
155  unsigned getIntrinsicID() const LLVM_READONLY;
156  bool isIntrinsic() const { return getName().startswith("llvm."); }
157 
158  /// getCallingConv()/setCallingConv(CC) - These method get and set the
159  /// calling convention of this function. The enum values for the known
160  /// calling conventions are defined in CallingConv.h.
162  return static_cast<CallingConv::ID>(getSubclassDataFromValue() >> 2);
163  }
165  setValueSubclassData((getSubclassDataFromValue() & 3) |
166  (static_cast<unsigned>(CC) << 2));
167  }
168 
169  /// @brief Return the attribute list for this Function.
170  AttributeSet getAttributes() const { return AttributeSets; }
171 
172  /// @brief Set the attribute list for this Function.
173  void setAttributes(AttributeSet attrs) { AttributeSets = attrs; }
174 
175  /// @brief Add function attributes to this function.
177  setAttributes(AttributeSets.addAttribute(getContext(),
178  AttributeSet::FunctionIndex, N));
179  }
180 
181  /// @brief Remove function attributes from this function.
183  setAttributes(AttributeSets.removeAttribute(
184  getContext(), AttributeSet::FunctionIndex, N));
185  }
186 
187  /// @brief Add function attributes to this function.
190  AttributeSets.addAttribute(getContext(),
191  AttributeSet::FunctionIndex, Kind));
192  }
195  AttributeSets.addAttribute(getContext(),
196  AttributeSet::FunctionIndex, Kind, Value));
197  }
198 
199  /// @brief Return true if the function has the attribute.
201  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex, Kind);
202  }
204  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex, Kind);
205  }
206 
207  /// @brief Return the attribute for the given attribute kind.
209  return AttributeSets.getAttribute(AttributeSet::FunctionIndex, Kind);
210  }
212  return AttributeSets.getAttribute(AttributeSet::FunctionIndex, Kind);
213  }
214 
215  /// hasGC/getGC/setGC/clearGC - The name of the garbage collection algorithm
216  /// to use during code generation.
217  bool hasGC() const;
218  const char *getGC() const;
219  void setGC(const char *Str);
220  void clearGC();
221 
222  /// @brief adds the attribute to the list of attributes.
223  void addAttribute(unsigned i, Attribute::AttrKind attr);
224 
225  /// @brief adds the attributes to the list of attributes.
226  void addAttributes(unsigned i, AttributeSet attrs);
227 
228  /// @brief removes the attributes from the list of attributes.
229  void removeAttributes(unsigned i, AttributeSet attr);
230 
231  /// @brief Extract the alignment for a call or parameter (0=unknown).
232  unsigned getParamAlignment(unsigned i) const {
233  return AttributeSets.getParamAlignment(i);
234  }
235 
236  /// @brief Determine if the function does not access memory.
237  bool doesNotAccessMemory() const {
238  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
240  }
243  }
244 
245  /// @brief Determine if the function does not access or only reads memory.
246  bool onlyReadsMemory() const {
247  return doesNotAccessMemory() ||
248  AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
250  }
253  }
254 
255  /// @brief Determine if the function cannot return.
256  bool doesNotReturn() const {
257  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
259  }
262  }
263 
264  /// @brief Determine if the function cannot unwind.
265  bool doesNotThrow() const {
266  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
268  }
271  }
272 
273  /// @brief Determine if the call cannot be duplicated.
274  bool cannotDuplicate() const {
275  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
277  }
280  }
281 
282  /// @brief True if the ABI mandates (or the user requested) that this
283  /// function be in a unwind table.
284  bool hasUWTable() const {
285  return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
287  }
288  void setHasUWTable() {
290  }
291 
292  /// @brief True if this function needs an unwind table.
293  bool needsUnwindTableEntry() const {
294  return hasUWTable() || !doesNotThrow();
295  }
296 
297  /// @brief Determine if the function returns a structure through first
298  /// pointer argument.
299  bool hasStructRetAttr() const {
300  return AttributeSets.hasAttribute(1, Attribute::StructRet);
301  }
302 
303  /// @brief Determine if the parameter does not alias other parameters.
304  /// @param n The parameter to check. 1 is the first parameter, 0 is the return
305  bool doesNotAlias(unsigned n) const {
306  return AttributeSets.hasAttribute(n, Attribute::NoAlias);
307  }
308  void setDoesNotAlias(unsigned n) {
310  }
311 
312  /// @brief Determine if the parameter can be captured.
313  /// @param n The parameter to check. 1 is the first parameter, 0 is the return
314  bool doesNotCapture(unsigned n) const {
315  return AttributeSets.hasAttribute(n, Attribute::NoCapture);
316  }
317  void setDoesNotCapture(unsigned n) {
319  }
320 
321  bool doesNotAccessMemory(unsigned n) const {
322  return AttributeSets.hasAttribute(n, Attribute::ReadNone);
323  }
324  void setDoesNotAccessMemory(unsigned n) {
326  }
327 
328  bool onlyReadsMemory(unsigned n) const {
329  return doesNotAccessMemory(n) ||
330  AttributeSets.hasAttribute(n, Attribute::ReadOnly);
331  }
332  void setOnlyReadsMemory(unsigned n) {
334  }
335 
336  /// copyAttributesFrom - copy all additional attributes (those not needed to
337  /// create a Function) from the Function Src to this one.
338  void copyAttributesFrom(const GlobalValue *Src);
339 
340  /// deleteBody - This method deletes the body of the function, and converts
341  /// the linkage to external.
342  ///
343  void deleteBody() {
346  }
347 
348  /// removeFromParent - This method unlinks 'this' from the containing module,
349  /// but does not delete it.
350  ///
351  virtual void removeFromParent();
352 
353  /// eraseFromParent - This method unlinks 'this' from the containing module
354  /// and deletes it.
355  ///
356  virtual void eraseFromParent();
357 
358 
359  /// Get the underlying elements of the Function... the basic block list is
360  /// empty for external functions.
361  ///
363  CheckLazyArguments();
364  return ArgumentList;
365  }
367  CheckLazyArguments();
368  return ArgumentList;
369  }
371  return &Function::ArgumentList;
372  }
373 
374  const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
375  BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
377  return &Function::BasicBlocks;
378  }
379 
380  const BasicBlock &getEntryBlock() const { return front(); }
381  BasicBlock &getEntryBlock() { return front(); }
382 
383  //===--------------------------------------------------------------------===//
384  // Symbol Table Accessing functions...
385 
386  /// getSymbolTable() - Return the symbol table...
387  ///
388  inline ValueSymbolTable &getValueSymbolTable() { return *SymTab; }
389  inline const ValueSymbolTable &getValueSymbolTable() const { return *SymTab; }
390 
391 
392  //===--------------------------------------------------------------------===//
393  // BasicBlock iterator forwarding functions
394  //
395  iterator begin() { return BasicBlocks.begin(); }
396  const_iterator begin() const { return BasicBlocks.begin(); }
397  iterator end () { return BasicBlocks.end(); }
398  const_iterator end () const { return BasicBlocks.end(); }
399 
400  size_t size() const { return BasicBlocks.size(); }
401  bool empty() const { return BasicBlocks.empty(); }
402  const BasicBlock &front() const { return BasicBlocks.front(); }
403  BasicBlock &front() { return BasicBlocks.front(); }
404  const BasicBlock &back() const { return BasicBlocks.back(); }
405  BasicBlock &back() { return BasicBlocks.back(); }
406 
407  //===--------------------------------------------------------------------===//
408  // Argument iterator forwarding functions
409  //
411  CheckLazyArguments();
412  return ArgumentList.begin();
413  }
415  CheckLazyArguments();
416  return ArgumentList.begin();
417  }
419  CheckLazyArguments();
420  return ArgumentList.end();
421  }
423  CheckLazyArguments();
424  return ArgumentList.end();
425  }
426 
427  size_t arg_size() const;
428  bool arg_empty() const;
429 
430  bool hasPrefixData() const {
431  return getSubclassDataFromValue() & 2;
432  }
433 
434  Constant *getPrefixData() const;
435  void setPrefixData(Constant *PrefixData);
436 
437  /// viewCFG - This function is meant for use from the debugger. You can just
438  /// say 'call F->viewCFG()' and a ghostview window should pop up from the
439  /// program, displaying the CFG of the current function with the code for each
440  /// basic block inside. This depends on there being a 'dot' and 'gv' program
441  /// in your path.
442  ///
443  void viewCFG() const;
444 
445  /// viewCFGOnly - This function is meant for use from the debugger. It works
446  /// just like viewCFG, but it does not include the contents of basic blocks
447  /// into the nodes, just the label. If you are only interested in the CFG
448  /// this can make the graph smaller.
449  ///
450  void viewCFGOnly() const;
451 
452  /// Methods for support type inquiry through isa, cast, and dyn_cast:
453  static inline bool classof(const Value *V) {
454  return V->getValueID() == Value::FunctionVal;
455  }
456 
457  /// dropAllReferences() - This method causes all the subinstructions to "let
458  /// go" of all references that they are maintaining. This allows one to
459  /// 'delete' a whole module at a time, even though there may be circular
460  /// references... first all references are dropped, and all use counts go to
461  /// zero. Then everything is deleted for real. Note that no operations are
462  /// valid on an object that has "dropped all references", except operator
463  /// delete.
464  ///
465  /// Since no other object in the module can have references into the body of a
466  /// function, dropping all references deletes the entire body of the function,
467  /// including any contained basic blocks.
468  ///
469  void dropAllReferences();
470 
471  /// hasAddressTaken - returns true if there are any uses of this function
472  /// other than direct calls or invokes to it, or blockaddress expressions.
473  /// Optionally passes back an offending user for diagnostic purposes.
474  ///
475  bool hasAddressTaken(const User** = 0) const;
476 
477  /// isDefTriviallyDead - Return true if it is trivially safe to remove
478  /// this function definition from the module (because it isn't externally
479  /// visible, does not have its address taken, and has no callers). To make
480  /// this more accurate, call removeDeadConstantUsers first.
481  bool isDefTriviallyDead() const;
482 
483  /// callsFunctionThatReturnsTwice - Return true if the function has a call to
484  /// setjmp or other function that gcc recognizes as "returning twice".
485  bool callsFunctionThatReturnsTwice() const;
486 
487 private:
488  // Shadow Value::setValueSubclassData with a private forwarding method so that
489  // subclasses cannot accidentally use it.
490  void setValueSubclassData(unsigned short D) {
492  }
493 };
494 
495 inline ValueSymbolTable *
497  return F ? &F->getValueSymbolTable() : 0;
498 }
499 
500 inline ValueSymbolTable *
502  return F ? &F->getValueSymbolTable() : 0;
503 }
504 
505 } // End llvm namespace
506 
507 #endif
bool isDefTriviallyDead() const
Definition: Function.cpp:712
BasicBlockListType::const_iterator const_iterator
Definition: Function.h:78
void viewCFGOnly() const
static void noteHead(BasicBlock *, BasicBlock *)
Definition: Function.h:46
LLVMContext & getContext() const
Definition: Function.cpp:167
LLVM Argument representation.
Definition: Argument.h:35
ArgumentListType::iterator arg_iterator
Definition: Function.h:80
static void destroySentinel(Argument *)
Definition: Function.h:59
bool onlyReadsMemory() const
Determine if the function does not access or only reads memory.
Definition: Function.h:246
The main container class for the LLVM Intermediate Representation.
Definition: Module.h:112
bool doesNotAccessMemory(unsigned n) const
Definition: Function.h:321
iterator end()
Definition: Function.h:397
void clearGC()
Definition: Function.cpp:330
const char * getGC() const
Definition: Function.cpp:315
bool isIntrinsic() const
Definition: Function.h:156
Externally visible function.
Definition: GlobalValue.h:34
Type * getReturnType() const
Definition: Function.cpp:179
arg_iterator arg_end()
Definition: Function.h:418
unsigned getParamAlignment(unsigned Index) const
Return the alignment for the specified function parameter.
Definition: Attributes.cpp:859
Attribute getFnAttribute(Attribute::AttrKind Kind) const
Return the attribute for the given attribute kind.
Definition: Function.h:208
F(f)
Argument * provideInitialHead() const
Definition: Function.h:61
iterator begin()
Definition: ilist.h:359
const_arg_iterator arg_end() const
Definition: Function.h:422
bool hasAttribute(unsigned Index, Attribute::AttrKind Kind) const
Return true if the attribute exists at the given index.
Definition: Attributes.cpp:818
virtual void removeFromParent()
Definition: Function.cpp:183
CallingConv::ID getCallingConv() const
Definition: Function.h:161
bool doesNotAlias(unsigned n) const
Determine if the parameter does not alias other parameters.
Definition: Function.h:305
size_t arg_size() const
Definition: Function.cpp:248
StringRef getName() const
Definition: Value.cpp:167
void setDoesNotThrow()
Definition: Function.h:269
AttributeSet removeAttribute(LLVMContext &C, unsigned Index, Attribute::AttrKind Attr) const
Remove the specified attribute at the specified index from this attribute list. Since attribute lists...
Definition: Attributes.cpp:733
bool doesNotThrow() const
Determine if the function cannot unwind.
Definition: Function.h:265
This file contains the simple types necessary to represent the attributes associated with functions a...
Function must be in a unwind table.
Definition: Attributes.h:109
bool onlyReadsMemory(unsigned n) const
Definition: Function.h:328
void copyAttributesFrom(const GlobalValue *Src)
Definition: Function.cpp:347
void viewCFG() const
ID
LLVM Calling Convention Representation.
Definition: CallingConv.h:26
const_iterator end() const
Definition: Function.h:398
Function does not access memory.
Definition: Attributes.h:93
Hidden pointer to structure to return.
Definition: Attributes.h:105
Function creates no aliases of pointer.
Definition: Attributes.h:82
void addFnAttr(Attribute::AttrKind N)
Add function attributes to this function.
Definition: Function.h:176
void addFnAttr(StringRef Kind, StringRef Value)
Definition: Function.h:193
LinkageTypes Linkage
Definition: GlobalValue.h:68
static void noteHead(Argument *, Argument *)
Definition: Function.h:63
const BasicBlock & back() const
Definition: Function.h:404
bool hasStructRetAttr() const
Determine if the function returns a structure through first pointer argument.
Definition: Function.h:299
const_iterator begin() const
Definition: Function.h:396
BasicBlock * createSentinel() const
Definition: Function.h:39
void removeAttributes(unsigned i, AttributeSet attr)
removes the attributes from the list of attributes.
Definition: Function.cpp:296
iterator begin()
Definition: Function.h:395
ValueSymbolTable & getValueSymbolTable()
Definition: Function.h:388
bool doesNotAccessMemory() const
Determine if the function does not access memory.
Definition: Function.h:237
Considered to not alias after call.
Definition: Attributes.h:80
bool hasAddressTaken(const User **=0) const
Definition: Function.cpp:698
void setDoesNotCapture(unsigned n)
Definition: Function.h:317
void setCallingConv(CallingConv::ID CC)
Definition: Function.h:164
void setOnlyReadsMemory()
Definition: Function.h:251
const ValueSymbolTable & getValueSymbolTable() const
Definition: Function.h:389
LLVM Basic Block Representation.
Definition: BasicBlock.h:72
iplist< BasicBlock > BasicBlockListType
Definition: Function.h:74
const_arg_iterator arg_begin() const
Definition: Function.h:414
unsigned getIntrinsicID() const LLVM_READONLY
Definition: Function.cpp:371
size_type LLVM_ATTRIBUTE_UNUSED_RESULT size() const
Definition: ilist.h:539
void deleteBody()
Definition: Function.h:343
LLVM Constant Representation.
Definition: Constant.h:41
BasicBlock & getEntryBlock()
Definition: Function.h:381
BasicBlock & front()
Definition: Function.h:403
void setDoesNotAlias(unsigned n)
Definition: Function.h:308
BasicBlock & back()
Definition: Function.h:405
bool doesNotReturn() const
Determine if the function cannot return.
Definition: Function.h:256
unsigned getValueID() const
Definition: Value.h:233
size_t size() const
Definition: Function.h:400
BasicBlock * provideInitialHead() const
Definition: Function.h:44
arg_iterator arg_begin()
Definition: Function.h:410
void setHasUWTable()
Definition: Function.h:288
Function doesn't unwind stack.
Definition: Attributes.h:90
BasicBlockListType::iterator iterator
Definition: Function.h:77
Mark the function as not returning.
Definition: Attributes.h:89
void setDoesNotAccessMemory(unsigned n)
Definition: Function.h:324
static iplist< BasicBlock > Function::* getSublistAccess(BasicBlock *)
Definition: Function.h:376
static iplist< Argument > Function::* getSublistAccess(Argument *)
Definition: Function.h:370
Call cannot be duplicated.
Definition: Attributes.h:83
void setCannotDuplicate()
Definition: Function.h:278
BasicBlockListType & getBasicBlockList()
Definition: Function.h:375
const BasicBlockListType & getBasicBlockList() const
Definition: Function.h:374
bool startswith(StringRef Prefix) const
Check if this string starts with the given Prefix.
Definition: StringRef.h:208
void setDoesNotReturn()
Definition: Function.h:260
bool LLVM_ATTRIBUTE_UNUSED_RESULT empty() const
Definition: ilist.h:385
bool needsUnwindTableEntry() const
True if this function needs an unwind table.
Definition: Function.h:293
void dropAllReferences()
Definition: Function.cpp:271
const BasicBlock & getEntryBlock() const
Definition: Function.h:380
void setValueSubclassData(unsigned short D)
Definition: Value.h:348
void setLinkage(LinkageTypes LT)
Definition: GlobalValue.h:217
#define LLVM_DELETED_FUNCTION
Definition: Compiler.h:137
AttributeSet getAttributes() const
Return the attribute list for this Function.
Definition: Function.h:170
ArgumentListType & getArgumentList()
Definition: Function.h:366
bool arg_empty() const
Definition: Function.cpp:251
LinkageTypes
An enumeration for the kinds of linkage for global values.
Definition: GlobalValue.h:33
void addAttribute(unsigned i, Attribute::AttrKind attr)
adds the attribute to the list of attributes.
Definition: Function.cpp:284
static bool classof(const Value *V)
Methods for support type inquiry through isa, cast, and dyn_cast:
Definition: Function.h:453
Function only reads from memory.
Definition: Attributes.h:94
bool hasGC() const
Definition: Function.cpp:310
void setGC(const char *Str)
Definition: Function.cpp:321
bool empty() const
Definition: Function.h:401
reference front()
Definition: ilist.h:390
AttributeSet addAttribute(LLVMContext &C, unsigned Index, Attribute::AttrKind Attr) const
Add an attribute to the attribute set at the given index. Since attribute sets are immutable...
Definition: Attributes.cpp:664
bool hasFnAttribute(Attribute::AttrKind Kind) const
Return true if the function has the attribute.
Definition: Function.h:200
unsigned short getSubclassDataFromValue() const
Definition: Value.h:347
void setDoesNotAccessMemory()
Definition: Function.h:241
void removeFnAttr(Attribute::AttrKind N)
Remove function attributes from this function.
Definition: Function.h:182
BasicBlock * ensureHead(BasicBlock *) const
Definition: Function.h:45
#define N
FunctionType * getFunctionType() const
Definition: Function.cpp:171
bool callsFunctionThatReturnsTwice() const
Definition: Function.cpp:728
void addFnAttr(StringRef Kind)
Add function attributes to this function.
Definition: Function.h:188
static bool getSymTab(Value *V, ValueSymbolTable *&ST)
Definition: Value.cpp:143
bool hasPrefixData() const
Definition: Function.h:430
bool hasUWTable() const
True if the ABI mandates (or the user requested) that this function be in a unwind table...
Definition: Function.h:284
virtual void eraseFromParent()
Definition: Function.cpp:187
#define LLVM_READONLY
Definition: Compiler.h:223
Constant * getPrefixData() const
Definition: Function.cpp:741
void setAttributes(AttributeSet attrs)
Set the attribute list for this Function.
Definition: Function.h:173
reference back()
Definition: ilist.h:398
Argument * createSentinel() const
Definition: Function.h:56
Attribute getAttribute(unsigned Index, Attribute::AttrKind Kind) const
Return the attribute object that exists at the given index.
Definition: Attributes.cpp:847
bool cannotDuplicate() const
Determine if the call cannot be duplicated.
Definition: Function.h:274
static NodeTy * createSentinel()
createSentinel - create the dynamic sentinel
Definition: ilist.h:78
bool hasFnAttribute(StringRef Kind) const
Definition: Function.h:203
const BasicBlock & front() const
Definition: Function.h:402
unsigned getParamAlignment(unsigned i) const
Extract the alignment for a call or parameter (0=unknown).
Definition: Function.h:232
iterator end()
Definition: ilist.h:367
iplist< Argument > ArgumentListType
Definition: Function.h:73
LLVM Value Representation.
Definition: Value.h:66
void setOnlyReadsMemory(unsigned n)
Definition: Function.h:332
bool doesNotCapture(unsigned n) const
Determine if the parameter can be captured.
Definition: Function.h:314
const ArgumentListType & getArgumentList() const
Definition: Function.h:362
static void destroySentinel(BasicBlock *)
Definition: Function.h:42
ArgumentListType::const_iterator const_arg_iterator
Definition: Function.h:81
void addAttributes(unsigned i, AttributeSet attrs)
adds the attributes to the list of attributes.
Definition: Function.cpp:290
Argument * ensureHead(Argument *) const
Definition: Function.h:62
bool isVarArg() const
Definition: Function.cpp:175
static Function * Create(FunctionType *Ty, LinkageTypes Linkage, const Twine &N="", Module *M=0)
Definition: Function.h:128
void setPrefixData(Constant *PrefixData)
Definition: Function.cpp:749
Attribute getFnAttribute(StringRef Kind) const
Definition: Function.h:211