1 //===- llvm/Attributes.h - Container for Attributes -------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief This file contains the simple types necessary to represent the
12 /// attributes associated with functions and their calls.
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_IR_ATTRIBUTES_H
17 #define LLVM_IR_ATTRIBUTES_H
19 #include "llvm/ADT/ArrayRef.h"
20 #include "llvm/ADT/FoldingSet.h"
21 #include "llvm/ADT/iterator_range.h"
22 #include "llvm/ADT/Optional.h"
23 #include "llvm/ADT/StringRef.h"
24 #include "llvm/Support/PointerLikeTypeTraits.h"
25 #include "llvm-c/Types.h"
37 class AttributeListImpl;
38 class AttributeSetNode;
39 template<typename T> struct DenseMapInfo;
44 //===----------------------------------------------------------------------===//
46 /// \brief Functions, function parameters, and return types can have attributes
47 /// to indicate how they should be treated by optimizations and code
48 /// generation. This class represents one of those attributes. It's light-weight
49 /// and should be passed around by-value.
52 /// This enumeration lists the attributes that can be associated with
53 /// parameters, function results, or the function itself.
55 /// Note: The `uwtable' attribute is about the ABI or the user mandating an
56 /// entry in the unwind table. The `nounwind' attribute is about an exception
57 /// passing by the function.
59 /// In a theoretical system that uses tables for profiling and SjLj for
60 /// exceptions, they would be fully independent. In a normal system that uses
61 /// tables for both, the semantics are:
63 /// nil = Needs an entry because an exception might pass by.
64 /// nounwind = No need for an entry
65 /// uwtable = Needs an entry because the ABI says so and because
66 /// an exception might pass by.
67 /// uwtable + nounwind = Needs an entry because the ABI says so.
70 // IR-Level Attributes
71 None, ///< No attributes have been set
73 #include "llvm/IR/Attributes.gen"
74 EndAttrKinds ///< Sentinal value useful for loops
78 AttributeImpl *pImpl = nullptr;
80 Attribute(AttributeImpl *A) : pImpl(A) {}
83 Attribute() = default;
85 //===--------------------------------------------------------------------===//
86 // Attribute Construction
87 //===--------------------------------------------------------------------===//
89 /// \brief Return a uniquified Attribute object.
90 static Attribute get(LLVMContext &Context, AttrKind Kind, uint64_t Val = 0);
91 static Attribute get(LLVMContext &Context, StringRef Kind,
92 StringRef Val = StringRef());
94 /// \brief Return a uniquified Attribute object that has the specific
96 static Attribute getWithAlignment(LLVMContext &Context, uint64_t Align);
97 static Attribute getWithStackAlignment(LLVMContext &Context, uint64_t Align);
98 static Attribute getWithDereferenceableBytes(LLVMContext &Context,
100 static Attribute getWithDereferenceableOrNullBytes(LLVMContext &Context,
102 static Attribute getWithAllocSizeArgs(LLVMContext &Context,
103 unsigned ElemSizeArg,
104 const Optional<unsigned> &NumElemsArg);
106 //===--------------------------------------------------------------------===//
107 // Attribute Accessors
108 //===--------------------------------------------------------------------===//
110 /// \brief Return true if the attribute is an Attribute::AttrKind type.
111 bool isEnumAttribute() const;
113 /// \brief Return true if the attribute is an integer attribute.
114 bool isIntAttribute() const;
116 /// \brief Return true if the attribute is a string (target-dependent)
118 bool isStringAttribute() const;
120 /// \brief Return true if the attribute is present.
121 bool hasAttribute(AttrKind Val) const;
123 /// \brief Return true if the target-dependent attribute is present.
124 bool hasAttribute(StringRef Val) const;
126 /// \brief Return the attribute's kind as an enum (Attribute::AttrKind). This
127 /// requires the attribute to be an enum or integer attribute.
128 Attribute::AttrKind getKindAsEnum() const;
130 /// \brief Return the attribute's value as an integer. This requires that the
131 /// attribute be an integer attribute.
132 uint64_t getValueAsInt() const;
134 /// \brief Return the attribute's kind as a string. This requires the
135 /// attribute to be a string attribute.
136 StringRef getKindAsString() const;
138 /// \brief Return the attribute's value as a string. This requires the
139 /// attribute to be a string attribute.
140 StringRef getValueAsString() const;
142 /// \brief Returns the alignment field of an attribute as a byte alignment
144 unsigned getAlignment() const;
146 /// \brief Returns the stack alignment field of an attribute as a byte
148 unsigned getStackAlignment() const;
150 /// \brief Returns the number of dereferenceable bytes from the
151 /// dereferenceable attribute.
152 uint64_t getDereferenceableBytes() const;
154 /// \brief Returns the number of dereferenceable_or_null bytes from the
155 /// dereferenceable_or_null attribute.
156 uint64_t getDereferenceableOrNullBytes() const;
158 /// Returns the argument numbers for the allocsize attribute (or pair(0, 0)
160 std::pair<unsigned, Optional<unsigned>> getAllocSizeArgs() const;
162 /// \brief The Attribute is converted to a string of equivalent mnemonic. This
163 /// is, presumably, for writing out the mnemonics for the assembly writer.
164 std::string getAsString(bool InAttrGrp = false) const;
166 /// \brief Equality and non-equality operators.
167 bool operator==(Attribute A) const { return pImpl == A.pImpl; }
168 bool operator!=(Attribute A) const { return pImpl != A.pImpl; }
170 /// \brief Less-than operator. Useful for sorting the attributes list.
171 bool operator<(Attribute A) const;
173 void Profile(FoldingSetNodeID &ID) const {
174 ID.AddPointer(pImpl);
177 /// \brief Return a raw pointer that uniquely identifies this attribute.
178 void *getRawPointer() const {
182 /// \brief Get an attribute from a raw pointer created by getRawPointer.
183 static Attribute fromRawPointer(void *RawPtr) {
184 return Attribute(reinterpret_cast<AttributeImpl*>(RawPtr));
188 // Specialized opaque value conversions.
189 inline LLVMAttributeRef wrap(Attribute Attr) {
190 return reinterpret_cast<LLVMAttributeRef>(Attr.getRawPointer());
193 // Specialized opaque value conversions.
194 inline Attribute unwrap(LLVMAttributeRef Attr) {
195 return Attribute::fromRawPointer(Attr);
198 //===----------------------------------------------------------------------===//
200 /// This class holds the attributes for a particular argument, parameter,
201 /// function, or return value. It is an immutable value type that is cheap to
202 /// copy. Adding and removing enum attributes is intended to be fast, but adding
203 /// and removing string or integer attributes involves a FoldingSet lookup.
205 // TODO: Extract AvailableAttrs from AttributeSetNode and store them here.
206 // This will allow an efficient implementation of addAttribute and
207 // removeAttribute for enum attrs.
209 /// Private implementation pointer.
210 AttributeSetNode *SetNode = nullptr;
212 friend AttributeListImpl;
213 template <typename Ty> friend struct DenseMapInfo;
216 explicit AttributeSet(AttributeSetNode *ASN) : SetNode(ASN) {}
219 /// AttributeSet is a trivially copyable value type.
220 AttributeSet() = default;
221 AttributeSet(const AttributeSet &) = default;
222 ~AttributeSet() = default;
224 static AttributeSet get(LLVMContext &C, const AttrBuilder &B);
225 static AttributeSet get(LLVMContext &C, ArrayRef<Attribute> Attrs);
227 bool operator==(const AttributeSet &O) { return SetNode == O.SetNode; }
228 bool operator!=(const AttributeSet &O) { return !(*this == O); }
230 unsigned getNumAttributes() const;
232 bool hasAttributes() const { return SetNode != nullptr; }
234 bool hasAttribute(Attribute::AttrKind Kind) const;
235 bool hasAttribute(StringRef Kind) const;
237 Attribute getAttribute(Attribute::AttrKind Kind) const;
238 Attribute getAttribute(StringRef Kind) const;
240 unsigned getAlignment() const;
241 unsigned getStackAlignment() const;
242 uint64_t getDereferenceableBytes() const;
243 uint64_t getDereferenceableOrNullBytes() const;
244 std::pair<unsigned, Optional<unsigned>> getAllocSizeArgs() const;
245 std::string getAsString(bool InAttrGrp = false) const;
247 typedef const Attribute *iterator;
248 iterator begin() const;
249 iterator end() const;
252 //===----------------------------------------------------------------------===//
254 /// \brief Provide DenseMapInfo for AttributeSet.
255 template <> struct DenseMapInfo<AttributeSet> {
256 static inline AttributeSet getEmptyKey() {
257 uintptr_t Val = static_cast<uintptr_t>(-1);
258 Val <<= PointerLikeTypeTraits<void *>::NumLowBitsAvailable;
259 return AttributeSet(reinterpret_cast<AttributeSetNode *>(Val));
262 static inline AttributeSet getTombstoneKey() {
263 uintptr_t Val = static_cast<uintptr_t>(-2);
264 Val <<= PointerLikeTypeTraits<void *>::NumLowBitsAvailable;
265 return AttributeSet(reinterpret_cast<AttributeSetNode *>(Val));
268 static unsigned getHashValue(AttributeSet AS) {
269 return (unsigned((uintptr_t)AS.SetNode) >> 4) ^
270 (unsigned((uintptr_t)AS.SetNode) >> 9);
273 static bool isEqual(AttributeSet LHS, AttributeSet RHS) { return LHS == RHS; }
276 //===----------------------------------------------------------------------===//
278 /// \brief This class holds the attributes for a function, its return value, and
279 /// its parameters. You access the attributes for each of them via an index into
280 /// the AttributeList object. The function attributes are at index
281 /// `AttributeList::FunctionIndex', the return value is at index
282 /// `AttributeList::ReturnIndex', and the attributes for the parameters start at
284 class AttributeList {
286 enum AttrIndex : unsigned {
293 friend class AttrBuilder;
294 friend class AttributeListImpl;
295 friend class AttributeSet;
296 friend class AttributeSetNode;
298 template <typename Ty> friend struct DenseMapInfo;
300 /// \brief The attributes that we are managing. This can be null to represent
301 /// the empty attributes list.
302 AttributeListImpl *pImpl = nullptr;
305 /// \brief Create an AttributeList with the specified parameters in it.
306 static AttributeList get(LLVMContext &C,
307 ArrayRef<std::pair<unsigned, Attribute>> Attrs);
309 get(LLVMContext &C, ArrayRef<std::pair<unsigned, AttributeSet>> Attrs);
311 /// \brief Create an AttributeList from attribute sets for a function, its
312 /// return value, and all of its arguments.
313 static AttributeList get(LLVMContext &C, AttributeSet FnAttrs,
314 AttributeSet RetAttrs,
315 ArrayRef<AttributeSet> ArgAttrs);
318 getImpl(LLVMContext &C,
319 ArrayRef<std::pair<unsigned, AttributeSet>> Attrs);
322 explicit AttributeList(AttributeListImpl *LI) : pImpl(LI) {}
325 AttributeList() = default;
327 //===--------------------------------------------------------------------===//
328 // AttributeList Construction and Mutation
329 //===--------------------------------------------------------------------===//
331 /// \brief Return an AttributeList with the specified parameters in it.
332 static AttributeList get(LLVMContext &C, ArrayRef<AttributeList> Attrs);
333 static AttributeList get(LLVMContext &C, unsigned Index,
334 ArrayRef<Attribute::AttrKind> Kinds);
335 static AttributeList get(LLVMContext &C, unsigned Index,
336 ArrayRef<StringRef> Kind);
337 static AttributeList get(LLVMContext &C, unsigned Index,
338 const AttrBuilder &B);
340 /// Add an argument attribute to the list. Returns a new list because
341 /// attribute lists are immutable.
342 AttributeList addParamAttribute(LLVMContext &C, unsigned ArgNo,
343 Attribute::AttrKind Kind) const {
344 return addAttribute(C, ArgNo + FirstArgIndex, Kind);
347 /// \brief Add an attribute to the attribute set at the given index. Because
348 /// attribute sets are immutable, this returns a new set.
349 AttributeList addAttribute(LLVMContext &C, unsigned Index,
350 Attribute::AttrKind Kind) const;
352 /// \brief Add an attribute to the attribute set at the given index. Because
353 /// attribute sets are immutable, this returns a new set.
354 AttributeList addAttribute(LLVMContext &C, unsigned Index, StringRef Kind,
355 StringRef Value = StringRef()) const;
357 /// Add an attribute to the attribute set at the given indices. Because
358 /// attribute sets are immutable, this returns a new set.
359 AttributeList addAttribute(LLVMContext &C, ArrayRef<unsigned> Indices,
362 /// \brief Add attributes to the attribute set at the given index. Because
363 /// attribute sets are immutable, this returns a new set.
364 AttributeList addAttributes(LLVMContext &C, unsigned Index,
365 const AttrBuilder &B) const;
367 /// \brief Remove the specified attribute at the specified index from this
368 /// attribute list. Because attribute lists are immutable, this returns the
370 AttributeList removeAttribute(LLVMContext &C, unsigned Index,
371 Attribute::AttrKind Kind) const;
373 /// \brief Remove the specified attribute at the specified index from this
374 /// attribute list. Because attribute lists are immutable, this returns the
376 AttributeList removeAttribute(LLVMContext &C, unsigned Index,
377 StringRef Kind) const;
379 /// \brief Remove the specified attributes at the specified index from this
380 /// attribute list. Because attribute lists are immutable, this returns the
382 AttributeList removeAttributes(LLVMContext &C, unsigned Index,
383 const AttrBuilder &AttrsToRemove) const;
385 /// \brief Remove all attributes at the specified index from this
386 /// attribute list. Because attribute lists are immutable, this returns the
388 AttributeList removeAttributes(LLVMContext &C, unsigned Index) const;
390 /// \brief Add the dereferenceable attribute to the attribute set at the given
391 /// index. Because attribute sets are immutable, this returns a new set.
392 AttributeList addDereferenceableAttr(LLVMContext &C, unsigned Index,
393 uint64_t Bytes) const;
395 /// \brief Add the dereferenceable_or_null attribute to the attribute set at
396 /// the given index. Because attribute sets are immutable, this returns a new
398 AttributeList addDereferenceableOrNullAttr(LLVMContext &C, unsigned Index,
399 uint64_t Bytes) const;
401 /// Add the allocsize attribute to the attribute set at the given index.
402 /// Because attribute sets are immutable, this returns a new set.
403 AttributeList addAllocSizeAttr(LLVMContext &C, unsigned Index,
404 unsigned ElemSizeArg,
405 const Optional<unsigned> &NumElemsArg);
407 //===--------------------------------------------------------------------===//
408 // AttributeList Accessors
409 //===--------------------------------------------------------------------===//
411 /// \brief Retrieve the LLVM context.
412 LLVMContext &getContext() const;
414 /// \brief The attributes for the specified index are returned.
415 AttributeSet getAttributes(unsigned Index) const;
417 /// \brief The attributes for the argument or parameter at the given index are
419 AttributeSet getParamAttributes(unsigned ArgNo) const;
421 /// \brief The attributes for the ret value are returned.
422 AttributeSet getRetAttributes() const;
424 /// \brief The function attributes are returned.
425 AttributeSet getFnAttributes() const;
427 /// \brief Return true if the attribute exists at the given index.
428 bool hasAttribute(unsigned Index, Attribute::AttrKind Kind) const;
430 /// \brief Return true if the attribute exists at the given index.
431 bool hasAttribute(unsigned Index, StringRef Kind) const;
433 /// \brief Return true if attribute exists at the given index.
434 bool hasAttributes(unsigned Index) const;
436 /// \brief Equivalent to hasAttribute(AttributeList::FunctionIndex, Kind) but
438 bool hasFnAttribute(Attribute::AttrKind Kind) const;
440 /// \brief Equivalent to hasAttribute(AttributeList::FunctionIndex, Kind) but
442 bool hasFnAttribute(StringRef Kind) const;
444 /// \brief Equivalent to hasAttribute(ArgNo + FirstArgIndex, Kind).
445 bool hasParamAttribute(unsigned ArgNo, Attribute::AttrKind Kind) const;
447 /// \brief Return true if the specified attribute is set for at least one
448 /// parameter or for the return value. If Index is not nullptr, the index
449 /// of a parameter with the specified attribute is provided.
450 bool hasAttrSomewhere(Attribute::AttrKind Kind,
451 unsigned *Index = nullptr) const;
453 /// \brief Return the attribute object that exists at the given index.
454 Attribute getAttribute(unsigned Index, Attribute::AttrKind Kind) const;
456 /// \brief Return the attribute object that exists at the given index.
457 Attribute getAttribute(unsigned Index, StringRef Kind) const;
459 /// \brief Return the alignment of the return value.
460 unsigned getRetAlignment() const;
462 /// \brief Return the alignment for the specified function parameter.
463 unsigned getParamAlignment(unsigned ArgNo) const;
465 /// \brief Get the stack alignment.
466 unsigned getStackAlignment(unsigned Index) const;
468 /// \brief Get the number of dereferenceable bytes (or zero if unknown).
469 uint64_t getDereferenceableBytes(unsigned Index) const;
471 /// \brief Get the number of dereferenceable_or_null bytes (or zero if
473 uint64_t getDereferenceableOrNullBytes(unsigned Index) const;
475 /// Get the allocsize argument numbers (or pair(0, 0) if unknown).
476 std::pair<unsigned, Optional<unsigned>>
477 getAllocSizeArgs(unsigned Index) const;
479 /// \brief Return the attributes at the index as a string.
480 std::string getAsString(unsigned Index, bool InAttrGrp = false) const;
482 typedef ArrayRef<Attribute>::iterator iterator;
484 iterator begin(unsigned Slot) const;
485 iterator end(unsigned Slot) const;
487 /// operator==/!= - Provide equality predicates.
488 bool operator==(const AttributeList &RHS) const { return pImpl == RHS.pImpl; }
489 bool operator!=(const AttributeList &RHS) const { return pImpl != RHS.pImpl; }
491 //===--------------------------------------------------------------------===//
492 // AttributeList Introspection
493 //===--------------------------------------------------------------------===//
495 /// \brief Return a raw pointer that uniquely identifies this attribute list.
496 void *getRawPointer() const {
500 /// \brief Return true if there are no attributes.
501 bool isEmpty() const {
502 return getNumSlots() == 0;
505 /// \brief Return the number of slots used in this attribute list. This is
506 /// the number of arguments that have an attribute set on them (including the
507 /// function itself).
508 unsigned getNumSlots() const;
510 /// \brief Return the index for the given slot.
511 unsigned getSlotIndex(unsigned Slot) const;
513 /// \brief Return the attributes at the given slot.
514 AttributeSet getSlotAttributes(unsigned Slot) const;
519 //===----------------------------------------------------------------------===//
521 /// \brief Provide DenseMapInfo for AttributeList.
522 template <> struct DenseMapInfo<AttributeList> {
523 static inline AttributeList getEmptyKey() {
524 uintptr_t Val = static_cast<uintptr_t>(-1);
525 Val <<= PointerLikeTypeTraits<void*>::NumLowBitsAvailable;
526 return AttributeList(reinterpret_cast<AttributeListImpl *>(Val));
529 static inline AttributeList getTombstoneKey() {
530 uintptr_t Val = static_cast<uintptr_t>(-2);
531 Val <<= PointerLikeTypeTraits<void*>::NumLowBitsAvailable;
532 return AttributeList(reinterpret_cast<AttributeListImpl *>(Val));
535 static unsigned getHashValue(AttributeList AS) {
536 return (unsigned((uintptr_t)AS.pImpl) >> 4) ^
537 (unsigned((uintptr_t)AS.pImpl) >> 9);
540 static bool isEqual(AttributeList LHS, AttributeList RHS) {
545 //===----------------------------------------------------------------------===//
547 /// \brief This class is used in conjunction with the Attribute::get method to
548 /// create an Attribute object. The object itself is uniquified. The Builder's
549 /// value, however, is not. So this can be used as a quick way to test for
550 /// equality, presence of attributes, etc.
552 std::bitset<Attribute::EndAttrKinds> Attrs;
553 std::map<std::string, std::string> TargetDepAttrs;
554 uint64_t Alignment = 0;
555 uint64_t StackAlignment = 0;
556 uint64_t DerefBytes = 0;
557 uint64_t DerefOrNullBytes = 0;
558 uint64_t AllocSizeArgs = 0;
561 AttrBuilder() = default;
562 AttrBuilder(const Attribute &A) {
565 AttrBuilder(AttributeList AS, unsigned Idx);
566 AttrBuilder(AttributeSet AS);
570 /// \brief Add an attribute to the builder.
571 AttrBuilder &addAttribute(Attribute::AttrKind Val);
573 /// \brief Add the Attribute object to the builder.
574 AttrBuilder &addAttribute(Attribute A);
576 /// \brief Add the target-dependent attribute to the builder.
577 AttrBuilder &addAttribute(StringRef A, StringRef V = StringRef());
579 /// \brief Remove an attribute from the builder.
580 AttrBuilder &removeAttribute(Attribute::AttrKind Val);
582 /// \brief Remove the attributes from the builder.
583 AttrBuilder &removeAttributes(AttributeList A, uint64_t WithoutIndex);
585 /// \brief Remove the target-dependent attribute to the builder.
586 AttrBuilder &removeAttribute(StringRef A);
588 /// \brief Add the attributes from the builder.
589 AttrBuilder &merge(const AttrBuilder &B);
591 /// \brief Remove the attributes from the builder.
592 AttrBuilder &remove(const AttrBuilder &B);
594 /// \brief Return true if the builder has any attribute that's in the
595 /// specified builder.
596 bool overlaps(const AttrBuilder &B) const;
598 /// \brief Return true if the builder has the specified attribute.
599 bool contains(Attribute::AttrKind A) const {
600 assert((unsigned)A < Attribute::EndAttrKinds && "Attribute out of range!");
604 /// \brief Return true if the builder has the specified target-dependent
606 bool contains(StringRef A) const;
608 /// \brief Return true if the builder has IR-level attributes.
609 bool hasAttributes() const;
611 /// \brief Return true if the builder has any attribute that's in the
612 /// specified attribute.
613 bool hasAttributes(AttributeList A, uint64_t Index) const;
615 /// \brief Return true if the builder has an alignment attribute.
616 bool hasAlignmentAttr() const;
618 /// \brief Retrieve the alignment attribute, if it exists.
619 uint64_t getAlignment() const { return Alignment; }
621 /// \brief Retrieve the stack alignment attribute, if it exists.
622 uint64_t getStackAlignment() const { return StackAlignment; }
624 /// \brief Retrieve the number of dereferenceable bytes, if the
625 /// dereferenceable attribute exists (zero is returned otherwise).
626 uint64_t getDereferenceableBytes() const { return DerefBytes; }
628 /// \brief Retrieve the number of dereferenceable_or_null bytes, if the
629 /// dereferenceable_or_null attribute exists (zero is returned otherwise).
630 uint64_t getDereferenceableOrNullBytes() const { return DerefOrNullBytes; }
632 /// Retrieve the allocsize args, if the allocsize attribute exists. If it
633 /// doesn't exist, pair(0, 0) is returned.
634 std::pair<unsigned, Optional<unsigned>> getAllocSizeArgs() const;
636 /// \brief This turns an int alignment (which must be a power of 2) into the
637 /// form used internally in Attribute.
638 AttrBuilder &addAlignmentAttr(unsigned Align);
640 /// \brief This turns an int stack alignment (which must be a power of 2) into
641 /// the form used internally in Attribute.
642 AttrBuilder &addStackAlignmentAttr(unsigned Align);
644 /// \brief This turns the number of dereferenceable bytes into the form used
645 /// internally in Attribute.
646 AttrBuilder &addDereferenceableAttr(uint64_t Bytes);
648 /// \brief This turns the number of dereferenceable_or_null bytes into the
649 /// form used internally in Attribute.
650 AttrBuilder &addDereferenceableOrNullAttr(uint64_t Bytes);
652 /// This turns one (or two) ints into the form used internally in Attribute.
653 AttrBuilder &addAllocSizeAttr(unsigned ElemSizeArg,
654 const Optional<unsigned> &NumElemsArg);
656 /// Add an allocsize attribute, using the representation returned by
657 /// Attribute.getIntValue().
658 AttrBuilder &addAllocSizeAttrFromRawRepr(uint64_t RawAllocSizeRepr);
660 /// \brief Return true if the builder contains no target-independent
662 bool empty() const { return Attrs.none(); }
664 // Iterators for target-dependent attributes.
665 typedef std::pair<std::string, std::string> td_type;
666 typedef std::map<std::string, std::string>::iterator td_iterator;
667 typedef std::map<std::string, std::string>::const_iterator td_const_iterator;
668 typedef iterator_range<td_iterator> td_range;
669 typedef iterator_range<td_const_iterator> td_const_range;
671 td_iterator td_begin() { return TargetDepAttrs.begin(); }
672 td_iterator td_end() { return TargetDepAttrs.end(); }
674 td_const_iterator td_begin() const { return TargetDepAttrs.begin(); }
675 td_const_iterator td_end() const { return TargetDepAttrs.end(); }
677 td_range td_attrs() { return td_range(td_begin(), td_end()); }
678 td_const_range td_attrs() const {
679 return td_const_range(td_begin(), td_end());
682 bool td_empty() const { return TargetDepAttrs.empty(); }
684 bool operator==(const AttrBuilder &B);
685 bool operator!=(const AttrBuilder &B) {
686 return !(*this == B);
690 namespace AttributeFuncs {
692 /// \brief Which attributes cannot be applied to a type.
693 AttrBuilder typeIncompatible(Type *Ty);
695 /// \returns Return true if the two functions have compatible target-independent
696 /// attributes for inlining purposes.
697 bool areInlineCompatible(const Function &Caller, const Function &Callee);
699 /// \brief Merge caller's and callee's attributes.
700 void mergeAttributesForInlining(Function &Caller, const Function &Callee);
702 } // end AttributeFuncs namespace
704 } // end llvm namespace
706 #endif // LLVM_IR_ATTRIBUTES_H