1 //===- Attributes.cpp - Implement AttributesList --------------------------===//
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 implements the Attribute, AttributeImpl, AttrBuilder,
12 // AttributeListImpl, and AttributeList classes.
14 //===----------------------------------------------------------------------===//
16 #include "AttributeImpl.h"
17 #include "LLVMContextImpl.h"
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/ADT/FoldingSet.h"
20 #include "llvm/ADT/Optional.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/STLExtras.h"
23 #include "llvm/ADT/StringExtras.h"
24 #include "llvm/ADT/StringRef.h"
25 #include "llvm/ADT/Twine.h"
26 #include "llvm/IR/Attributes.h"
27 #include "llvm/IR/Function.h"
28 #include "llvm/IR/LLVMContext.h"
29 #include "llvm/IR/Type.h"
30 #include "llvm/Support/Compiler.h"
31 #include "llvm/Support/Debug.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/raw_ostream.h"
48 //===----------------------------------------------------------------------===//
49 // Attribute Construction Methods
50 //===----------------------------------------------------------------------===//
52 // allocsize has two integer arguments, but because they're both 32 bits, we can
53 // pack them into one 64-bit value, at the cost of making said value
56 // In order to do this, we need to reserve one value of the second (optional)
57 // allocsize argument to signify "not present."
58 static const unsigned AllocSizeNumElemsNotPresent = -1;
60 static uint64_t packAllocSizeArgs(unsigned ElemSizeArg,
61 const Optional<unsigned> &NumElemsArg) {
62 assert((!NumElemsArg.hasValue() ||
63 *NumElemsArg != AllocSizeNumElemsNotPresent) &&
64 "Attempting to pack a reserved value");
66 return uint64_t(ElemSizeArg) << 32 |
67 NumElemsArg.getValueOr(AllocSizeNumElemsNotPresent);
70 static std::pair<unsigned, Optional<unsigned>>
71 unpackAllocSizeArgs(uint64_t Num) {
72 unsigned NumElems = Num & std::numeric_limits<unsigned>::max();
73 unsigned ElemSizeArg = Num >> 32;
75 Optional<unsigned> NumElemsArg;
76 if (NumElems != AllocSizeNumElemsNotPresent)
77 NumElemsArg = NumElems;
78 return std::make_pair(ElemSizeArg, NumElemsArg);
81 Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
83 LLVMContextImpl *pImpl = Context.pImpl;
86 if (Val) ID.AddInteger(Val);
89 AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
92 // If we didn't find any existing attributes of the same shape then create a
93 // new one and insert it.
95 PA = new EnumAttributeImpl(Kind);
97 PA = new IntAttributeImpl(Kind, Val);
98 pImpl->AttrsSet.InsertNode(PA, InsertPoint);
101 // Return the Attribute that we found or created.
102 return Attribute(PA);
105 Attribute Attribute::get(LLVMContext &Context, StringRef Kind, StringRef Val) {
106 LLVMContextImpl *pImpl = Context.pImpl;
109 if (!Val.empty()) ID.AddString(Val);
112 AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
115 // If we didn't find any existing attributes of the same shape then create a
116 // new one and insert it.
117 PA = new StringAttributeImpl(Kind, Val);
118 pImpl->AttrsSet.InsertNode(PA, InsertPoint);
121 // Return the Attribute that we found or created.
122 return Attribute(PA);
125 Attribute Attribute::getWithAlignment(LLVMContext &Context, uint64_t Align) {
126 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
127 assert(Align <= 0x40000000 && "Alignment too large.");
128 return get(Context, Alignment, Align);
131 Attribute Attribute::getWithStackAlignment(LLVMContext &Context,
133 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
134 assert(Align <= 0x100 && "Alignment too large.");
135 return get(Context, StackAlignment, Align);
138 Attribute Attribute::getWithDereferenceableBytes(LLVMContext &Context,
140 assert(Bytes && "Bytes must be non-zero.");
141 return get(Context, Dereferenceable, Bytes);
144 Attribute Attribute::getWithDereferenceableOrNullBytes(LLVMContext &Context,
146 assert(Bytes && "Bytes must be non-zero.");
147 return get(Context, DereferenceableOrNull, Bytes);
151 Attribute::getWithAllocSizeArgs(LLVMContext &Context, unsigned ElemSizeArg,
152 const Optional<unsigned> &NumElemsArg) {
153 assert(!(ElemSizeArg == 0 && NumElemsArg && *NumElemsArg == 0) &&
154 "Invalid allocsize arguments -- given allocsize(0, 0)");
155 return get(Context, AllocSize, packAllocSizeArgs(ElemSizeArg, NumElemsArg));
158 //===----------------------------------------------------------------------===//
159 // Attribute Accessor Methods
160 //===----------------------------------------------------------------------===//
162 bool Attribute::isEnumAttribute() const {
163 return pImpl && pImpl->isEnumAttribute();
166 bool Attribute::isIntAttribute() const {
167 return pImpl && pImpl->isIntAttribute();
170 bool Attribute::isStringAttribute() const {
171 return pImpl && pImpl->isStringAttribute();
174 Attribute::AttrKind Attribute::getKindAsEnum() const {
175 if (!pImpl) return None;
176 assert((isEnumAttribute() || isIntAttribute()) &&
177 "Invalid attribute type to get the kind as an enum!");
178 return pImpl->getKindAsEnum();
181 uint64_t Attribute::getValueAsInt() const {
182 if (!pImpl) return 0;
183 assert(isIntAttribute() &&
184 "Expected the attribute to be an integer attribute!");
185 return pImpl->getValueAsInt();
188 StringRef Attribute::getKindAsString() const {
189 if (!pImpl) return StringRef();
190 assert(isStringAttribute() &&
191 "Invalid attribute type to get the kind as a string!");
192 return pImpl->getKindAsString();
195 StringRef Attribute::getValueAsString() const {
196 if (!pImpl) return StringRef();
197 assert(isStringAttribute() &&
198 "Invalid attribute type to get the value as a string!");
199 return pImpl->getValueAsString();
202 bool Attribute::hasAttribute(AttrKind Kind) const {
203 return (pImpl && pImpl->hasAttribute(Kind)) || (!pImpl && Kind == None);
206 bool Attribute::hasAttribute(StringRef Kind) const {
207 if (!isStringAttribute()) return false;
208 return pImpl && pImpl->hasAttribute(Kind);
211 unsigned Attribute::getAlignment() const {
212 assert(hasAttribute(Attribute::Alignment) &&
213 "Trying to get alignment from non-alignment attribute!");
214 return pImpl->getValueAsInt();
217 unsigned Attribute::getStackAlignment() const {
218 assert(hasAttribute(Attribute::StackAlignment) &&
219 "Trying to get alignment from non-alignment attribute!");
220 return pImpl->getValueAsInt();
223 uint64_t Attribute::getDereferenceableBytes() const {
224 assert(hasAttribute(Attribute::Dereferenceable) &&
225 "Trying to get dereferenceable bytes from "
226 "non-dereferenceable attribute!");
227 return pImpl->getValueAsInt();
230 uint64_t Attribute::getDereferenceableOrNullBytes() const {
231 assert(hasAttribute(Attribute::DereferenceableOrNull) &&
232 "Trying to get dereferenceable bytes from "
233 "non-dereferenceable attribute!");
234 return pImpl->getValueAsInt();
237 std::pair<unsigned, Optional<unsigned>> Attribute::getAllocSizeArgs() const {
238 assert(hasAttribute(Attribute::AllocSize) &&
239 "Trying to get allocsize args from non-allocsize attribute");
240 return unpackAllocSizeArgs(pImpl->getValueAsInt());
243 std::string Attribute::getAsString(bool InAttrGrp) const {
244 if (!pImpl) return "";
246 if (hasAttribute(Attribute::SanitizeAddress))
247 return "sanitize_address";
248 if (hasAttribute(Attribute::AlwaysInline))
249 return "alwaysinline";
250 if (hasAttribute(Attribute::ArgMemOnly))
252 if (hasAttribute(Attribute::Builtin))
254 if (hasAttribute(Attribute::ByVal))
256 if (hasAttribute(Attribute::Convergent))
258 if (hasAttribute(Attribute::SwiftError))
260 if (hasAttribute(Attribute::SwiftSelf))
262 if (hasAttribute(Attribute::InaccessibleMemOnly))
263 return "inaccessiblememonly";
264 if (hasAttribute(Attribute::InaccessibleMemOrArgMemOnly))
265 return "inaccessiblemem_or_argmemonly";
266 if (hasAttribute(Attribute::InAlloca))
268 if (hasAttribute(Attribute::InlineHint))
270 if (hasAttribute(Attribute::InReg))
272 if (hasAttribute(Attribute::JumpTable))
274 if (hasAttribute(Attribute::MinSize))
276 if (hasAttribute(Attribute::Naked))
278 if (hasAttribute(Attribute::Nest))
280 if (hasAttribute(Attribute::NoAlias))
282 if (hasAttribute(Attribute::NoBuiltin))
284 if (hasAttribute(Attribute::NoCapture))
286 if (hasAttribute(Attribute::NoDuplicate))
287 return "noduplicate";
288 if (hasAttribute(Attribute::NoImplicitFloat))
289 return "noimplicitfloat";
290 if (hasAttribute(Attribute::NoInline))
292 if (hasAttribute(Attribute::NonLazyBind))
293 return "nonlazybind";
294 if (hasAttribute(Attribute::NonNull))
296 if (hasAttribute(Attribute::NoRedZone))
298 if (hasAttribute(Attribute::NoReturn))
300 if (hasAttribute(Attribute::NoRecurse))
302 if (hasAttribute(Attribute::NoUnwind))
304 if (hasAttribute(Attribute::OptimizeNone))
306 if (hasAttribute(Attribute::OptimizeForSize))
308 if (hasAttribute(Attribute::ReadNone))
310 if (hasAttribute(Attribute::ReadOnly))
312 if (hasAttribute(Attribute::WriteOnly))
314 if (hasAttribute(Attribute::Returned))
316 if (hasAttribute(Attribute::ReturnsTwice))
317 return "returns_twice";
318 if (hasAttribute(Attribute::SExt))
320 if (hasAttribute(Attribute::Speculatable))
321 return "speculatable";
322 if (hasAttribute(Attribute::StackProtect))
324 if (hasAttribute(Attribute::StackProtectReq))
326 if (hasAttribute(Attribute::StackProtectStrong))
328 if (hasAttribute(Attribute::SafeStack))
330 if (hasAttribute(Attribute::StructRet))
332 if (hasAttribute(Attribute::SanitizeThread))
333 return "sanitize_thread";
334 if (hasAttribute(Attribute::SanitizeMemory))
335 return "sanitize_memory";
336 if (hasAttribute(Attribute::UWTable))
338 if (hasAttribute(Attribute::ZExt))
340 if (hasAttribute(Attribute::Cold))
343 // FIXME: These should be output like this:
348 if (hasAttribute(Attribute::Alignment)) {
351 Result += (InAttrGrp) ? "=" : " ";
352 Result += utostr(getValueAsInt());
356 auto AttrWithBytesToString = [&](const char *Name) {
361 Result += utostr(getValueAsInt());
364 Result += utostr(getValueAsInt());
370 if (hasAttribute(Attribute::StackAlignment))
371 return AttrWithBytesToString("alignstack");
373 if (hasAttribute(Attribute::Dereferenceable))
374 return AttrWithBytesToString("dereferenceable");
376 if (hasAttribute(Attribute::DereferenceableOrNull))
377 return AttrWithBytesToString("dereferenceable_or_null");
379 if (hasAttribute(Attribute::AllocSize)) {
381 Optional<unsigned> NumElems;
382 std::tie(ElemSize, NumElems) = getAllocSizeArgs();
384 std::string Result = "allocsize(";
385 Result += utostr(ElemSize);
386 if (NumElems.hasValue()) {
388 Result += utostr(*NumElems);
394 // Convert target-dependent attributes to strings of the form:
399 if (isStringAttribute()) {
401 Result += (Twine('"') + getKindAsString() + Twine('"')).str();
403 std::string AttrVal = pImpl->getValueAsString();
404 if (AttrVal.empty()) return Result;
406 // Since some attribute strings contain special characters that cannot be
407 // printable, those have to be escaped to make the attribute value printable
408 // as is. e.g. "\01__gnu_mcount_nc"
410 raw_string_ostream OS(Result);
412 PrintEscapedString(AttrVal, OS);
418 llvm_unreachable("Unknown attribute");
421 bool Attribute::operator<(Attribute A) const {
422 if (!pImpl && !A.pImpl) return false;
423 if (!pImpl) return true;
424 if (!A.pImpl) return false;
425 return *pImpl < *A.pImpl;
428 //===----------------------------------------------------------------------===//
429 // AttributeImpl Definition
430 //===----------------------------------------------------------------------===//
432 // Pin the vtables to this file.
433 AttributeImpl::~AttributeImpl() = default;
435 void EnumAttributeImpl::anchor() {}
437 void IntAttributeImpl::anchor() {}
439 void StringAttributeImpl::anchor() {}
441 bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
442 if (isStringAttribute()) return false;
443 return getKindAsEnum() == A;
446 bool AttributeImpl::hasAttribute(StringRef Kind) const {
447 if (!isStringAttribute()) return false;
448 return getKindAsString() == Kind;
451 Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
452 assert(isEnumAttribute() || isIntAttribute());
453 return static_cast<const EnumAttributeImpl *>(this)->getEnumKind();
456 uint64_t AttributeImpl::getValueAsInt() const {
457 assert(isIntAttribute());
458 return static_cast<const IntAttributeImpl *>(this)->getValue();
461 StringRef AttributeImpl::getKindAsString() const {
462 assert(isStringAttribute());
463 return static_cast<const StringAttributeImpl *>(this)->getStringKind();
466 StringRef AttributeImpl::getValueAsString() const {
467 assert(isStringAttribute());
468 return static_cast<const StringAttributeImpl *>(this)->getStringValue();
471 bool AttributeImpl::operator<(const AttributeImpl &AI) const {
472 // This sorts the attributes with Attribute::AttrKinds coming first (sorted
473 // relative to their enum value) and then strings.
474 if (isEnumAttribute()) {
475 if (AI.isEnumAttribute()) return getKindAsEnum() < AI.getKindAsEnum();
476 if (AI.isIntAttribute()) return true;
477 if (AI.isStringAttribute()) return true;
480 if (isIntAttribute()) {
481 if (AI.isEnumAttribute()) return false;
482 if (AI.isIntAttribute()) {
483 if (getKindAsEnum() == AI.getKindAsEnum())
484 return getValueAsInt() < AI.getValueAsInt();
485 return getKindAsEnum() < AI.getKindAsEnum();
487 if (AI.isStringAttribute()) return true;
490 if (AI.isEnumAttribute()) return false;
491 if (AI.isIntAttribute()) return false;
492 if (getKindAsString() == AI.getKindAsString())
493 return getValueAsString() < AI.getValueAsString();
494 return getKindAsString() < AI.getKindAsString();
497 //===----------------------------------------------------------------------===//
498 // AttributeSet Definition
499 //===----------------------------------------------------------------------===//
501 AttributeSet AttributeSet::get(LLVMContext &C, const AttrBuilder &B) {
502 return AttributeSet(AttributeSetNode::get(C, B));
505 AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<Attribute> Attrs) {
506 return AttributeSet(AttributeSetNode::get(C, Attrs));
509 AttributeSet AttributeSet::addAttribute(LLVMContext &C,
510 Attribute::AttrKind Kind) const {
511 if (hasAttribute(Kind)) return *this;
513 B.addAttribute(Kind);
514 return addAttributes(C, AttributeSet::get(C, B));
517 AttributeSet AttributeSet::addAttribute(LLVMContext &C, StringRef Kind,
518 StringRef Value) const {
520 B.addAttribute(Kind, Value);
521 return addAttributes(C, AttributeSet::get(C, B));
524 AttributeSet AttributeSet::addAttributes(LLVMContext &C,
525 const AttributeSet AS) const {
526 if (!hasAttributes())
529 if (!AS.hasAttributes())
533 for (Attribute I : *this)
539 AttributeSet AttributeSet::removeAttribute(LLVMContext &C,
540 Attribute::AttrKind Kind) const {
541 if (!hasAttribute(Kind)) return *this;
543 B.addAttribute(Kind);
544 return removeAttributes(C, B);
547 AttributeSet AttributeSet::removeAttribute(LLVMContext &C,
548 StringRef Kind) const {
549 if (!hasAttribute(Kind)) return *this;
551 B.addAttribute(Kind);
552 return removeAttributes(C, B);
555 AttributeSet AttributeSet::removeAttributes(LLVMContext &C,
556 const AttrBuilder &Attrs) const {
558 // FIXME it is not obvious how this should work for alignment.
559 // For now, say we can't pass in alignment, which no current use does.
560 assert(!Attrs.hasAlignmentAttr() && "Attempt to change alignment!");
562 AttrBuilder B(*this);
567 unsigned AttributeSet::getNumAttributes() const {
568 return SetNode ? SetNode->getNumAttributes() : 0;
571 bool AttributeSet::hasAttribute(Attribute::AttrKind Kind) const {
572 return SetNode ? SetNode->hasAttribute(Kind) : false;
575 bool AttributeSet::hasAttribute(StringRef Kind) const {
576 return SetNode ? SetNode->hasAttribute(Kind) : false;
579 Attribute AttributeSet::getAttribute(Attribute::AttrKind Kind) const {
580 return SetNode ? SetNode->getAttribute(Kind) : Attribute();
583 Attribute AttributeSet::getAttribute(StringRef Kind) const {
584 return SetNode ? SetNode->getAttribute(Kind) : Attribute();
587 unsigned AttributeSet::getAlignment() const {
588 return SetNode ? SetNode->getAlignment() : 0;
591 unsigned AttributeSet::getStackAlignment() const {
592 return SetNode ? SetNode->getStackAlignment() : 0;
595 uint64_t AttributeSet::getDereferenceableBytes() const {
596 return SetNode ? SetNode->getDereferenceableBytes() : 0;
599 uint64_t AttributeSet::getDereferenceableOrNullBytes() const {
600 return SetNode ? SetNode->getDereferenceableOrNullBytes() : 0;
603 std::pair<unsigned, Optional<unsigned>> AttributeSet::getAllocSizeArgs() const {
604 return SetNode ? SetNode->getAllocSizeArgs()
605 : std::pair<unsigned, Optional<unsigned>>(0, 0);
608 std::string AttributeSet::getAsString(bool InAttrGrp) const {
609 return SetNode ? SetNode->getAsString(InAttrGrp) : "";
612 AttributeSet::iterator AttributeSet::begin() const {
613 return SetNode ? SetNode->begin() : nullptr;
616 AttributeSet::iterator AttributeSet::end() const {
617 return SetNode ? SetNode->end() : nullptr;
620 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
621 LLVM_DUMP_METHOD void AttributeSet::dump() const {
624 dbgs() << getAsString(true) << " }\n";
628 //===----------------------------------------------------------------------===//
629 // AttributeSetNode Definition
630 //===----------------------------------------------------------------------===//
632 AttributeSetNode::AttributeSetNode(ArrayRef<Attribute> Attrs)
633 : AvailableAttrs(0), NumAttrs(Attrs.size()) {
634 // There's memory after the node where we can store the entries in.
635 std::copy(Attrs.begin(), Attrs.end(), getTrailingObjects<Attribute>());
637 for (Attribute I : *this) {
638 if (!I.isStringAttribute()) {
639 AvailableAttrs |= ((uint64_t)1) << I.getKindAsEnum();
644 AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
645 ArrayRef<Attribute> Attrs) {
649 // Otherwise, build a key to look up the existing attributes.
650 LLVMContextImpl *pImpl = C.pImpl;
653 SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
654 std::sort(SortedAttrs.begin(), SortedAttrs.end());
656 for (Attribute Attr : SortedAttrs)
660 AttributeSetNode *PA =
661 pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
663 // If we didn't find any existing attributes of the same shape then create a
664 // new one and insert it.
666 // Coallocate entries after the AttributeSetNode itself.
667 void *Mem = ::operator new(totalSizeToAlloc<Attribute>(SortedAttrs.size()));
668 PA = new (Mem) AttributeSetNode(SortedAttrs);
669 pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
672 // Return the AttributeSetNode that we found or created.
676 AttributeSetNode *AttributeSetNode::get(LLVMContext &C, const AttrBuilder &B) {
677 // Add target-independent attributes.
678 SmallVector<Attribute, 8> Attrs;
679 for (Attribute::AttrKind Kind = Attribute::None;
680 Kind != Attribute::EndAttrKinds; Kind = Attribute::AttrKind(Kind + 1)) {
681 if (!B.contains(Kind))
686 case Attribute::Alignment:
687 Attr = Attribute::getWithAlignment(C, B.getAlignment());
689 case Attribute::StackAlignment:
690 Attr = Attribute::getWithStackAlignment(C, B.getStackAlignment());
692 case Attribute::Dereferenceable:
693 Attr = Attribute::getWithDereferenceableBytes(
694 C, B.getDereferenceableBytes());
696 case Attribute::DereferenceableOrNull:
697 Attr = Attribute::getWithDereferenceableOrNullBytes(
698 C, B.getDereferenceableOrNullBytes());
700 case Attribute::AllocSize: {
701 auto A = B.getAllocSizeArgs();
702 Attr = Attribute::getWithAllocSizeArgs(C, A.first, A.second);
706 Attr = Attribute::get(C, Kind);
708 Attrs.push_back(Attr);
711 // Add target-dependent (string) attributes.
712 for (const auto &TDA : B.td_attrs())
713 Attrs.emplace_back(Attribute::get(C, TDA.first, TDA.second));
715 return get(C, Attrs);
718 bool AttributeSetNode::hasAttribute(StringRef Kind) const {
719 for (Attribute I : *this)
720 if (I.hasAttribute(Kind))
725 Attribute AttributeSetNode::getAttribute(Attribute::AttrKind Kind) const {
726 if (hasAttribute(Kind)) {
727 for (Attribute I : *this)
728 if (I.hasAttribute(Kind))
734 Attribute AttributeSetNode::getAttribute(StringRef Kind) const {
735 for (Attribute I : *this)
736 if (I.hasAttribute(Kind))
741 unsigned AttributeSetNode::getAlignment() const {
742 for (Attribute I : *this)
743 if (I.hasAttribute(Attribute::Alignment))
744 return I.getAlignment();
748 unsigned AttributeSetNode::getStackAlignment() const {
749 for (Attribute I : *this)
750 if (I.hasAttribute(Attribute::StackAlignment))
751 return I.getStackAlignment();
755 uint64_t AttributeSetNode::getDereferenceableBytes() const {
756 for (Attribute I : *this)
757 if (I.hasAttribute(Attribute::Dereferenceable))
758 return I.getDereferenceableBytes();
762 uint64_t AttributeSetNode::getDereferenceableOrNullBytes() const {
763 for (Attribute I : *this)
764 if (I.hasAttribute(Attribute::DereferenceableOrNull))
765 return I.getDereferenceableOrNullBytes();
769 std::pair<unsigned, Optional<unsigned>>
770 AttributeSetNode::getAllocSizeArgs() const {
771 for (Attribute I : *this)
772 if (I.hasAttribute(Attribute::AllocSize))
773 return I.getAllocSizeArgs();
774 return std::make_pair(0, 0);
777 std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
779 for (iterator I = begin(), E = end(); I != E; ++I) {
782 Str += I->getAsString(InAttrGrp);
787 //===----------------------------------------------------------------------===//
788 // AttributeListImpl Definition
789 //===----------------------------------------------------------------------===//
791 /// Map from AttributeList index to the internal array index. Adding one works:
792 /// FunctionIndex: ~0U -> 0
793 /// ReturnIndex: 0 -> 1
794 /// FirstArgIndex: 1.. -> 2..
795 static constexpr unsigned attrIdxToArrayIdx(unsigned Index) {
796 // MSVC warns about '~0U + 1' wrapping around when this is called on
797 // FunctionIndex, so cast to int first.
798 return static_cast<int>(Index) + 1;
801 AttributeListImpl::AttributeListImpl(LLVMContext &C,
802 ArrayRef<AttributeSet> Sets)
803 : AvailableFunctionAttrs(0), Context(C), NumAttrSets(Sets.size()) {
804 assert(!Sets.empty() && "pointless AttributeListImpl");
806 // There's memory after the node where we can store the entries in.
807 std::copy(Sets.begin(), Sets.end(), getTrailingObjects<AttributeSet>());
809 // Initialize AvailableFunctionAttrs summary bitset.
810 static_assert(Attribute::EndAttrKinds <=
811 sizeof(AvailableFunctionAttrs) * CHAR_BIT,
812 "Too many attributes");
813 static_assert(attrIdxToArrayIdx(AttributeList::FunctionIndex) == 0U,
814 "function should be stored in slot 0");
815 for (Attribute I : Sets[0]) {
816 if (!I.isStringAttribute())
817 AvailableFunctionAttrs |= 1ULL << I.getKindAsEnum();
821 void AttributeListImpl::Profile(FoldingSetNodeID &ID) const {
822 Profile(ID, makeArrayRef(begin(), end()));
825 void AttributeListImpl::Profile(FoldingSetNodeID &ID,
826 ArrayRef<AttributeSet> Sets) {
827 for (const auto &Set : Sets)
828 ID.AddPointer(Set.SetNode);
831 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
832 LLVM_DUMP_METHOD void AttributeListImpl::dump() const {
833 AttributeList(const_cast<AttributeListImpl *>(this)).dump();
837 //===----------------------------------------------------------------------===//
838 // AttributeList Construction and Mutation Methods
839 //===----------------------------------------------------------------------===//
841 AttributeList AttributeList::getImpl(LLVMContext &C,
842 ArrayRef<AttributeSet> AttrSets) {
843 assert(!AttrSets.empty() && "pointless AttributeListImpl");
845 LLVMContextImpl *pImpl = C.pImpl;
847 AttributeListImpl::Profile(ID, AttrSets);
850 AttributeListImpl *PA =
851 pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
853 // If we didn't find any existing attributes of the same shape then
854 // create a new one and insert it.
856 // Coallocate entries after the AttributeListImpl itself.
857 void *Mem = ::operator new(
858 AttributeListImpl::totalSizeToAlloc<AttributeSet>(AttrSets.size()));
859 PA = new (Mem) AttributeListImpl(C, AttrSets);
860 pImpl->AttrsLists.InsertNode(PA, InsertPoint);
863 // Return the AttributesList that we found or created.
864 return AttributeList(PA);
868 AttributeList::get(LLVMContext &C,
869 ArrayRef<std::pair<unsigned, Attribute>> Attrs) {
870 // If there are no attributes then return a null AttributesList pointer.
872 return AttributeList();
874 assert(std::is_sorted(Attrs.begin(), Attrs.end(),
875 [](const std::pair<unsigned, Attribute> &LHS,
876 const std::pair<unsigned, Attribute> &RHS) {
877 return LHS.first < RHS.first;
878 }) && "Misordered Attributes list!");
879 assert(none_of(Attrs,
880 [](const std::pair<unsigned, Attribute> &Pair) {
881 return Pair.second.hasAttribute(Attribute::None);
883 "Pointless attribute!");
885 // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
887 SmallVector<std::pair<unsigned, AttributeSet>, 8> AttrPairVec;
888 for (ArrayRef<std::pair<unsigned, Attribute>>::iterator I = Attrs.begin(),
889 E = Attrs.end(); I != E; ) {
890 unsigned Index = I->first;
891 SmallVector<Attribute, 4> AttrVec;
892 while (I != E && I->first == Index) {
893 AttrVec.push_back(I->second);
897 AttrPairVec.emplace_back(Index, AttributeSet::get(C, AttrVec));
900 return get(C, AttrPairVec);
904 AttributeList::get(LLVMContext &C,
905 ArrayRef<std::pair<unsigned, AttributeSet>> Attrs) {
906 // If there are no attributes then return a null AttributesList pointer.
908 return AttributeList();
910 assert(std::is_sorted(Attrs.begin(), Attrs.end(),
911 [](const std::pair<unsigned, AttributeSet> &LHS,
912 const std::pair<unsigned, AttributeSet> &RHS) {
913 return LHS.first < RHS.first;
915 "Misordered Attributes list!");
916 assert(none_of(Attrs,
917 [](const std::pair<unsigned, AttributeSet> &Pair) {
918 return !Pair.second.hasAttributes();
920 "Pointless attribute!");
922 unsigned MaxIndex = Attrs.back().first;
924 SmallVector<AttributeSet, 4> AttrVec(attrIdxToArrayIdx(MaxIndex) + 1);
925 for (auto Pair : Attrs)
926 AttrVec[attrIdxToArrayIdx(Pair.first)] = Pair.second;
928 return getImpl(C, AttrVec);
931 AttributeList AttributeList::get(LLVMContext &C, AttributeSet FnAttrs,
932 AttributeSet RetAttrs,
933 ArrayRef<AttributeSet> ArgAttrs) {
934 // Scan from the end to find the last argument with attributes. Most
935 // arguments don't have attributes, so it's nice if we can have fewer unique
936 // AttributeListImpls by dropping empty attribute sets at the end of the list.
937 unsigned NumSets = 0;
938 for (size_t I = ArgAttrs.size(); I != 0; --I) {
939 if (ArgAttrs[I - 1].hasAttributes()) {
945 // Check function and return attributes if we didn't have argument
947 if (RetAttrs.hasAttributes())
949 else if (FnAttrs.hasAttributes())
953 // If all attribute sets were empty, we can use the empty attribute list.
955 return AttributeList();
957 SmallVector<AttributeSet, 8> AttrSets;
958 AttrSets.reserve(NumSets);
959 // If we have any attributes, we always have function attributes.
960 AttrSets.push_back(FnAttrs);
962 AttrSets.push_back(RetAttrs);
964 // Drop the empty argument attribute sets at the end.
965 ArgAttrs = ArgAttrs.take_front(NumSets - 2);
966 AttrSets.insert(AttrSets.end(), ArgAttrs.begin(), ArgAttrs.end());
969 return getImpl(C, AttrSets);
972 AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
973 const AttrBuilder &B) {
974 if (!B.hasAttributes())
975 return AttributeList();
976 Index = attrIdxToArrayIdx(Index);
977 SmallVector<AttributeSet, 8> AttrSets(Index + 1);
978 AttrSets[Index] = AttributeSet::get(C, B);
979 return getImpl(C, AttrSets);
982 AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
983 ArrayRef<Attribute::AttrKind> Kinds) {
984 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
985 for (Attribute::AttrKind K : Kinds)
986 Attrs.emplace_back(Index, Attribute::get(C, K));
987 return get(C, Attrs);
990 AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
991 ArrayRef<StringRef> Kinds) {
992 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
993 for (StringRef K : Kinds)
994 Attrs.emplace_back(Index, Attribute::get(C, K));
995 return get(C, Attrs);
998 AttributeList AttributeList::get(LLVMContext &C,
999 ArrayRef<AttributeList> Attrs) {
1001 return AttributeList();
1002 if (Attrs.size() == 1)
1005 unsigned MaxSize = 0;
1006 for (AttributeList List : Attrs)
1007 MaxSize = std::max(MaxSize, List.getNumAttrSets());
1009 // If every list was empty, there is no point in merging the lists.
1011 return AttributeList();
1013 SmallVector<AttributeSet, 8> NewAttrSets(MaxSize);
1014 for (unsigned I = 0; I < MaxSize; ++I) {
1015 AttrBuilder CurBuilder;
1016 for (AttributeList List : Attrs)
1017 CurBuilder.merge(List.getAttributes(I - 1));
1018 NewAttrSets[I] = AttributeSet::get(C, CurBuilder);
1021 return getImpl(C, NewAttrSets);
1024 AttributeList AttributeList::addAttribute(LLVMContext &C, unsigned Index,
1025 Attribute::AttrKind Kind) const {
1026 if (hasAttribute(Index, Kind)) return *this;
1028 B.addAttribute(Kind);
1029 return addAttributes(C, Index, B);
1032 AttributeList AttributeList::addAttribute(LLVMContext &C, unsigned Index,
1034 StringRef Value) const {
1036 B.addAttribute(Kind, Value);
1037 return addAttributes(C, Index, B);
1040 AttributeList AttributeList::addAttribute(LLVMContext &C, unsigned Index,
1041 Attribute A) const {
1044 return addAttributes(C, Index, B);
1047 AttributeList AttributeList::addAttributes(LLVMContext &C, unsigned Index,
1048 const AttrBuilder &B) const {
1049 if (!B.hasAttributes())
1053 return AttributeList::get(C, {{Index, AttributeSet::get(C, B)}});
1056 // FIXME it is not obvious how this should work for alignment. For now, say
1057 // we can't change a known alignment.
1058 unsigned OldAlign = getAttributes(Index).getAlignment();
1059 unsigned NewAlign = B.getAlignment();
1060 assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
1061 "Attempt to change alignment!");
1064 Index = attrIdxToArrayIdx(Index);
1065 SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
1066 if (Index >= AttrSets.size())
1067 AttrSets.resize(Index + 1);
1069 AttrBuilder Merged(AttrSets[Index]);
1071 AttrSets[Index] = AttributeSet::get(C, Merged);
1073 return getImpl(C, AttrSets);
1076 AttributeList AttributeList::addParamAttribute(LLVMContext &C,
1077 ArrayRef<unsigned> ArgNos,
1078 Attribute A) const {
1079 assert(std::is_sorted(ArgNos.begin(), ArgNos.end()));
1081 SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
1082 unsigned MaxIndex = attrIdxToArrayIdx(ArgNos.back() + FirstArgIndex);
1083 if (MaxIndex >= AttrSets.size())
1084 AttrSets.resize(MaxIndex + 1);
1086 for (unsigned ArgNo : ArgNos) {
1087 unsigned Index = attrIdxToArrayIdx(ArgNo + FirstArgIndex);
1088 AttrBuilder B(AttrSets[Index]);
1090 AttrSets[Index] = AttributeSet::get(C, B);
1093 return getImpl(C, AttrSets);
1096 AttributeList AttributeList::removeAttribute(LLVMContext &C, unsigned Index,
1097 Attribute::AttrKind Kind) const {
1098 if (!hasAttribute(Index, Kind)) return *this;
1100 B.addAttribute(Kind);
1101 return removeAttributes(C, Index, B);
1104 AttributeList AttributeList::removeAttribute(LLVMContext &C, unsigned Index,
1105 StringRef Kind) const {
1106 if (!hasAttribute(Index, Kind)) return *this;
1108 B.addAttribute(Kind);
1109 return removeAttributes(C, Index, B);
1113 AttributeList::removeAttributes(LLVMContext &C, unsigned Index,
1114 const AttrBuilder &AttrsToRemove) const {
1116 return AttributeList();
1118 // FIXME it is not obvious how this should work for alignment.
1119 // For now, say we can't pass in alignment, which no current use does.
1120 assert(!AttrsToRemove.hasAlignmentAttr() && "Attempt to change alignment!");
1122 Index = attrIdxToArrayIdx(Index);
1123 SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
1124 if (Index >= AttrSets.size())
1125 AttrSets.resize(Index + 1);
1127 AttrBuilder B(AttrSets[Index]);
1128 B.remove(AttrsToRemove);
1129 AttrSets[Index] = AttributeSet::get(C, B);
1131 return getImpl(C, AttrSets);
1134 AttributeList AttributeList::removeAttributes(LLVMContext &C,
1135 unsigned WithoutIndex) const {
1137 return AttributeList();
1138 WithoutIndex = attrIdxToArrayIdx(WithoutIndex);
1139 if (WithoutIndex >= getNumAttrSets())
1141 SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
1142 AttrSets[WithoutIndex] = AttributeSet();
1143 return getImpl(C, AttrSets);
1146 AttributeList AttributeList::addDereferenceableAttr(LLVMContext &C,
1148 uint64_t Bytes) const {
1150 B.addDereferenceableAttr(Bytes);
1151 return addAttributes(C, Index, B);
1155 AttributeList::addDereferenceableOrNullAttr(LLVMContext &C, unsigned Index,
1156 uint64_t Bytes) const {
1158 B.addDereferenceableOrNullAttr(Bytes);
1159 return addAttributes(C, Index, B);
1163 AttributeList::addAllocSizeAttr(LLVMContext &C, unsigned Index,
1164 unsigned ElemSizeArg,
1165 const Optional<unsigned> &NumElemsArg) {
1167 B.addAllocSizeAttr(ElemSizeArg, NumElemsArg);
1168 return addAttributes(C, Index, B);
1171 //===----------------------------------------------------------------------===//
1172 // AttributeList Accessor Methods
1173 //===----------------------------------------------------------------------===//
1175 LLVMContext &AttributeList::getContext() const { return pImpl->getContext(); }
1177 AttributeSet AttributeList::getParamAttributes(unsigned ArgNo) const {
1178 return getAttributes(ArgNo + FirstArgIndex);
1181 AttributeSet AttributeList::getRetAttributes() const {
1182 return getAttributes(ReturnIndex);
1185 AttributeSet AttributeList::getFnAttributes() const {
1186 return getAttributes(FunctionIndex);
1189 bool AttributeList::hasAttribute(unsigned Index,
1190 Attribute::AttrKind Kind) const {
1191 return getAttributes(Index).hasAttribute(Kind);
1194 bool AttributeList::hasAttribute(unsigned Index, StringRef Kind) const {
1195 return getAttributes(Index).hasAttribute(Kind);
1198 bool AttributeList::hasAttributes(unsigned Index) const {
1199 return getAttributes(Index).hasAttributes();
1202 bool AttributeList::hasFnAttribute(Attribute::AttrKind Kind) const {
1203 return pImpl && pImpl->hasFnAttribute(Kind);
1206 bool AttributeList::hasFnAttribute(StringRef Kind) const {
1207 return hasAttribute(AttributeList::FunctionIndex, Kind);
1210 bool AttributeList::hasParamAttribute(unsigned ArgNo,
1211 Attribute::AttrKind Kind) const {
1212 return hasAttribute(ArgNo + FirstArgIndex, Kind);
1215 bool AttributeList::hasAttrSomewhere(Attribute::AttrKind Attr,
1216 unsigned *Index) const {
1217 if (!pImpl) return false;
1219 for (unsigned I = index_begin(), E = index_end(); I != E; ++I) {
1220 if (hasAttribute(I, Attr)) {
1230 Attribute AttributeList::getAttribute(unsigned Index,
1231 Attribute::AttrKind Kind) const {
1232 return getAttributes(Index).getAttribute(Kind);
1235 Attribute AttributeList::getAttribute(unsigned Index, StringRef Kind) const {
1236 return getAttributes(Index).getAttribute(Kind);
1239 unsigned AttributeList::getRetAlignment() const {
1240 return getAttributes(ReturnIndex).getAlignment();
1243 unsigned AttributeList::getParamAlignment(unsigned ArgNo) const {
1244 return getAttributes(ArgNo + FirstArgIndex).getAlignment();
1247 unsigned AttributeList::getStackAlignment(unsigned Index) const {
1248 return getAttributes(Index).getStackAlignment();
1251 uint64_t AttributeList::getDereferenceableBytes(unsigned Index) const {
1252 return getAttributes(Index).getDereferenceableBytes();
1255 uint64_t AttributeList::getDereferenceableOrNullBytes(unsigned Index) const {
1256 return getAttributes(Index).getDereferenceableOrNullBytes();
1259 std::pair<unsigned, Optional<unsigned>>
1260 AttributeList::getAllocSizeArgs(unsigned Index) const {
1261 return getAttributes(Index).getAllocSizeArgs();
1264 std::string AttributeList::getAsString(unsigned Index, bool InAttrGrp) const {
1265 return getAttributes(Index).getAsString(InAttrGrp);
1268 AttributeSet AttributeList::getAttributes(unsigned Index) const {
1269 Index = attrIdxToArrayIdx(Index);
1270 if (!pImpl || Index >= getNumAttrSets())
1271 return AttributeSet();
1272 return pImpl->begin()[Index];
1275 AttributeList::iterator AttributeList::begin() const {
1276 return pImpl ? pImpl->begin() : nullptr;
1279 AttributeList::iterator AttributeList::end() const {
1280 return pImpl ? pImpl->end() : nullptr;
1283 //===----------------------------------------------------------------------===//
1284 // AttributeList Introspection Methods
1285 //===----------------------------------------------------------------------===//
1287 unsigned AttributeList::getNumAttrSets() const {
1288 return pImpl ? pImpl->NumAttrSets : 0;
1291 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
1292 LLVM_DUMP_METHOD void AttributeList::dump() const {
1295 for (unsigned i = index_begin(), e = index_end(); i != e; ++i) {
1296 if (getAttributes(i).hasAttributes())
1297 dbgs() << " { " << i << " => " << getAsString(i) << " }\n";
1304 //===----------------------------------------------------------------------===//
1305 // AttrBuilder Method Implementations
1306 //===----------------------------------------------------------------------===//
1308 // FIXME: Remove this ctor, use AttributeSet.
1309 AttrBuilder::AttrBuilder(AttributeList AL, unsigned Index) {
1310 AttributeSet AS = AL.getAttributes(Index);
1311 for (const Attribute &A : AS)
1315 AttrBuilder::AttrBuilder(AttributeSet AS) {
1316 for (const Attribute &A : AS)
1320 void AttrBuilder::clear() {
1322 TargetDepAttrs.clear();
1323 Alignment = StackAlignment = DerefBytes = DerefOrNullBytes = 0;
1327 AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
1328 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
1329 assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
1330 Val != Attribute::Dereferenceable && Val != Attribute::AllocSize &&
1331 "Adding integer attribute without adding a value!");
1336 AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
1337 if (Attr.isStringAttribute()) {
1338 addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
1342 Attribute::AttrKind Kind = Attr.getKindAsEnum();
1345 if (Kind == Attribute::Alignment)
1346 Alignment = Attr.getAlignment();
1347 else if (Kind == Attribute::StackAlignment)
1348 StackAlignment = Attr.getStackAlignment();
1349 else if (Kind == Attribute::Dereferenceable)
1350 DerefBytes = Attr.getDereferenceableBytes();
1351 else if (Kind == Attribute::DereferenceableOrNull)
1352 DerefOrNullBytes = Attr.getDereferenceableOrNullBytes();
1353 else if (Kind == Attribute::AllocSize)
1354 AllocSizeArgs = Attr.getValueAsInt();
1358 AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
1359 TargetDepAttrs[A] = V;
1363 AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
1364 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
1367 if (Val == Attribute::Alignment)
1369 else if (Val == Attribute::StackAlignment)
1371 else if (Val == Attribute::Dereferenceable)
1373 else if (Val == Attribute::DereferenceableOrNull)
1374 DerefOrNullBytes = 0;
1375 else if (Val == Attribute::AllocSize)
1381 AttrBuilder &AttrBuilder::removeAttributes(AttributeList A, uint64_t Index) {
1382 remove(A.getAttributes(Index));
1386 AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
1387 std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
1388 if (I != TargetDepAttrs.end())
1389 TargetDepAttrs.erase(I);
1393 std::pair<unsigned, Optional<unsigned>> AttrBuilder::getAllocSizeArgs() const {
1394 return unpackAllocSizeArgs(AllocSizeArgs);
1397 AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
1398 if (Align == 0) return *this;
1400 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1401 assert(Align <= 0x40000000 && "Alignment too large.");
1403 Attrs[Attribute::Alignment] = true;
1408 AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
1409 // Default alignment, allow the target to define how to align it.
1410 if (Align == 0) return *this;
1412 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1413 assert(Align <= 0x100 && "Alignment too large.");
1415 Attrs[Attribute::StackAlignment] = true;
1416 StackAlignment = Align;
1420 AttrBuilder &AttrBuilder::addDereferenceableAttr(uint64_t Bytes) {
1421 if (Bytes == 0) return *this;
1423 Attrs[Attribute::Dereferenceable] = true;
1428 AttrBuilder &AttrBuilder::addDereferenceableOrNullAttr(uint64_t Bytes) {
1432 Attrs[Attribute::DereferenceableOrNull] = true;
1433 DerefOrNullBytes = Bytes;
1437 AttrBuilder &AttrBuilder::addAllocSizeAttr(unsigned ElemSize,
1438 const Optional<unsigned> &NumElems) {
1439 return addAllocSizeAttrFromRawRepr(packAllocSizeArgs(ElemSize, NumElems));
1442 AttrBuilder &AttrBuilder::addAllocSizeAttrFromRawRepr(uint64_t RawArgs) {
1443 // (0, 0) is our "not present" value, so we need to check for it here.
1444 assert(RawArgs && "Invalid allocsize arguments -- given allocsize(0, 0)");
1446 Attrs[Attribute::AllocSize] = true;
1447 // Reuse existing machinery to store this as a single 64-bit integer so we can
1448 // save a few bytes over using a pair<unsigned, Optional<unsigned>>.
1449 AllocSizeArgs = RawArgs;
1453 AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
1454 // FIXME: What if both have alignments, but they don't match?!
1456 Alignment = B.Alignment;
1458 if (!StackAlignment)
1459 StackAlignment = B.StackAlignment;
1462 DerefBytes = B.DerefBytes;
1464 if (!DerefOrNullBytes)
1465 DerefOrNullBytes = B.DerefOrNullBytes;
1468 AllocSizeArgs = B.AllocSizeArgs;
1472 for (auto I : B.td_attrs())
1473 TargetDepAttrs[I.first] = I.second;
1478 AttrBuilder &AttrBuilder::remove(const AttrBuilder &B) {
1479 // FIXME: What if both have alignments, but they don't match?!
1483 if (B.StackAlignment)
1489 if (B.DerefOrNullBytes)
1490 DerefOrNullBytes = 0;
1492 if (B.AllocSizeArgs)
1497 for (auto I : B.td_attrs())
1498 TargetDepAttrs.erase(I.first);
1503 bool AttrBuilder::overlaps(const AttrBuilder &B) const {
1504 // First check if any of the target independent attributes overlap.
1505 if ((Attrs & B.Attrs).any())
1508 // Then check if any target dependent ones do.
1509 for (const auto &I : td_attrs())
1510 if (B.contains(I.first))
1516 bool AttrBuilder::contains(StringRef A) const {
1517 return TargetDepAttrs.find(A) != TargetDepAttrs.end();
1520 bool AttrBuilder::hasAttributes() const {
1521 return !Attrs.none() || !TargetDepAttrs.empty();
1524 bool AttrBuilder::hasAttributes(AttributeList AL, uint64_t Index) const {
1525 AttributeSet AS = AL.getAttributes(Index);
1527 for (Attribute Attr : AS) {
1528 if (Attr.isEnumAttribute() || Attr.isIntAttribute()) {
1529 if (contains(Attr.getKindAsEnum()))
1532 assert(Attr.isStringAttribute() && "Invalid attribute kind!");
1533 return contains(Attr.getKindAsString());
1540 bool AttrBuilder::hasAlignmentAttr() const {
1541 return Alignment != 0;
1544 bool AttrBuilder::operator==(const AttrBuilder &B) {
1545 if (Attrs != B.Attrs)
1548 for (td_const_iterator I = TargetDepAttrs.begin(),
1549 E = TargetDepAttrs.end(); I != E; ++I)
1550 if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
1553 return Alignment == B.Alignment && StackAlignment == B.StackAlignment &&
1554 DerefBytes == B.DerefBytes;
1557 //===----------------------------------------------------------------------===//
1558 // AttributeFuncs Function Defintions
1559 //===----------------------------------------------------------------------===//
1561 /// \brief Which attributes cannot be applied to a type.
1562 AttrBuilder AttributeFuncs::typeIncompatible(Type *Ty) {
1563 AttrBuilder Incompatible;
1565 if (!Ty->isIntegerTy())
1566 // Attribute that only apply to integers.
1567 Incompatible.addAttribute(Attribute::SExt)
1568 .addAttribute(Attribute::ZExt);
1570 if (!Ty->isPointerTy())
1571 // Attribute that only apply to pointers.
1572 Incompatible.addAttribute(Attribute::ByVal)
1573 .addAttribute(Attribute::Nest)
1574 .addAttribute(Attribute::NoAlias)
1575 .addAttribute(Attribute::NoCapture)
1576 .addAttribute(Attribute::NonNull)
1577 .addDereferenceableAttr(1) // the int here is ignored
1578 .addDereferenceableOrNullAttr(1) // the int here is ignored
1579 .addAttribute(Attribute::ReadNone)
1580 .addAttribute(Attribute::ReadOnly)
1581 .addAttribute(Attribute::StructRet)
1582 .addAttribute(Attribute::InAlloca);
1584 return Incompatible;
1587 template<typename AttrClass>
1588 static bool isEqual(const Function &Caller, const Function &Callee) {
1589 return Caller.getFnAttribute(AttrClass::getKind()) ==
1590 Callee.getFnAttribute(AttrClass::getKind());
1593 /// \brief Compute the logical AND of the attributes of the caller and the
1596 /// This function sets the caller's attribute to false if the callee's attribute
1598 template<typename AttrClass>
1599 static void setAND(Function &Caller, const Function &Callee) {
1600 if (AttrClass::isSet(Caller, AttrClass::getKind()) &&
1601 !AttrClass::isSet(Callee, AttrClass::getKind()))
1602 AttrClass::set(Caller, AttrClass::getKind(), false);
1605 /// \brief Compute the logical OR of the attributes of the caller and the
1608 /// This function sets the caller's attribute to true if the callee's attribute
1610 template<typename AttrClass>
1611 static void setOR(Function &Caller, const Function &Callee) {
1612 if (!AttrClass::isSet(Caller, AttrClass::getKind()) &&
1613 AttrClass::isSet(Callee, AttrClass::getKind()))
1614 AttrClass::set(Caller, AttrClass::getKind(), true);
1617 /// \brief If the inlined function had a higher stack protection level than the
1618 /// calling function, then bump up the caller's stack protection level.
1619 static void adjustCallerSSPLevel(Function &Caller, const Function &Callee) {
1620 // If upgrading the SSP attribute, clear out the old SSP Attributes first.
1621 // Having multiple SSP attributes doesn't actually hurt, but it adds useless
1622 // clutter to the IR.
1623 AttrBuilder OldSSPAttr;
1624 OldSSPAttr.addAttribute(Attribute::StackProtect)
1625 .addAttribute(Attribute::StackProtectStrong)
1626 .addAttribute(Attribute::StackProtectReq);
1628 if (Callee.hasFnAttribute(Attribute::StackProtectReq)) {
1629 Caller.removeAttributes(AttributeList::FunctionIndex, OldSSPAttr);
1630 Caller.addFnAttr(Attribute::StackProtectReq);
1631 } else if (Callee.hasFnAttribute(Attribute::StackProtectStrong) &&
1632 !Caller.hasFnAttribute(Attribute::StackProtectReq)) {
1633 Caller.removeAttributes(AttributeList::FunctionIndex, OldSSPAttr);
1634 Caller.addFnAttr(Attribute::StackProtectStrong);
1635 } else if (Callee.hasFnAttribute(Attribute::StackProtect) &&
1636 !Caller.hasFnAttribute(Attribute::StackProtectReq) &&
1637 !Caller.hasFnAttribute(Attribute::StackProtectStrong))
1638 Caller.addFnAttr(Attribute::StackProtect);
1641 #define GET_ATTR_COMPAT_FUNC
1642 #include "AttributesCompatFunc.inc"
1644 bool AttributeFuncs::areInlineCompatible(const Function &Caller,
1645 const Function &Callee) {
1646 return hasCompatibleFnAttrs(Caller, Callee);
1649 void AttributeFuncs::mergeAttributesForInlining(Function &Caller,
1650 const Function &Callee) {
1651 mergeFnAttrs(Caller, Callee);