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 // AttributeSetImpl, and AttributeSet classes.
14 //===----------------------------------------------------------------------===//
16 #include "llvm/IR/Attributes.h"
17 #include "AttributeImpl.h"
18 #include "LLVMContextImpl.h"
19 #include "llvm/ADT/StringExtras.h"
20 #include "llvm/IR/Type.h"
21 #include "llvm/Support/Atomic.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/ManagedStatic.h"
24 #include "llvm/Support/Mutex.h"
25 #include "llvm/Support/raw_ostream.h"
29 //===----------------------------------------------------------------------===//
30 // Attribute Construction Methods
31 //===----------------------------------------------------------------------===//
33 Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
35 LLVMContextImpl *pImpl = Context.pImpl;
38 if (Val) ID.AddInteger(Val);
41 AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
44 // If we didn't find any existing attributes of the same shape then create a
45 // new one and insert it.
47 new AttributeImpl(Context, Kind) :
48 new AttributeImpl(Context, Kind, Val);
49 pImpl->AttrsSet.InsertNode(PA, InsertPoint);
52 // Return the Attribute that we found or created.
56 Attribute Attribute::get(LLVMContext &Context, StringRef Kind, StringRef Val) {
57 LLVMContextImpl *pImpl = Context.pImpl;
60 if (!Val.empty()) ID.AddString(Val);
63 AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
66 // If we didn't find any existing attributes of the same shape then create a
67 // new one and insert it.
68 PA = new AttributeImpl(Context, Kind, Val);
69 pImpl->AttrsSet.InsertNode(PA, InsertPoint);
72 // Return the Attribute that we found or created.
76 Attribute Attribute::getWithAlignment(LLVMContext &Context, uint64_t Align) {
77 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
78 assert(Align <= 0x40000000 && "Alignment too large.");
79 return get(Context, Alignment, Align);
82 Attribute Attribute::getWithStackAlignment(LLVMContext &Context,
84 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
85 assert(Align <= 0x100 && "Alignment too large.");
86 return get(Context, StackAlignment, Align);
89 //===----------------------------------------------------------------------===//
90 // Attribute Accessor Methods
91 //===----------------------------------------------------------------------===//
93 bool Attribute::isEnumAttribute() const {
94 return pImpl && pImpl->isEnumAttribute();
97 bool Attribute::isAlignAttribute() const {
98 return pImpl && pImpl->isAlignAttribute();
101 bool Attribute::isStringAttribute() const {
102 return pImpl && pImpl->isStringAttribute();
105 Attribute::AttrKind Attribute::getKindAsEnum() const {
106 assert((isEnumAttribute() || isAlignAttribute()) &&
107 "Invalid attribute type to get the kind as an enum!");
108 return pImpl ? pImpl->getKindAsEnum() : None;
111 uint64_t Attribute::getValueAsInt() const {
112 assert(isAlignAttribute() &&
113 "Expected the attribute to be an alignment attribute!");
114 return pImpl ? pImpl->getValueAsInt() : 0;
117 StringRef Attribute::getKindAsString() const {
118 assert(isStringAttribute() &&
119 "Invalid attribute type to get the kind as a string!");
120 return pImpl ? pImpl->getKindAsString() : StringRef();
123 StringRef Attribute::getValueAsString() const {
124 assert(isStringAttribute() &&
125 "Invalid attribute type to get the value as a string!");
126 return pImpl ? pImpl->getValueAsString() : StringRef();
129 bool Attribute::hasAttribute(AttrKind Kind) const {
130 return (pImpl && pImpl->hasAttribute(Kind)) || (!pImpl && Kind == None);
133 bool Attribute::hasAttribute(StringRef Kind) const {
134 if (!isStringAttribute()) return false;
135 return pImpl && pImpl->hasAttribute(Kind);
138 /// This returns the alignment field of an attribute as a byte alignment value.
139 unsigned Attribute::getAlignment() const {
140 assert(hasAttribute(Attribute::Alignment) &&
141 "Trying to get alignment from non-alignment attribute!");
142 return pImpl->getValueAsInt();
145 /// This returns the stack alignment field of an attribute as a byte alignment
147 unsigned Attribute::getStackAlignment() const {
148 assert(hasAttribute(Attribute::StackAlignment) &&
149 "Trying to get alignment from non-alignment attribute!");
150 return pImpl->getValueAsInt();
153 std::string Attribute::getAsString(bool InAttrGrp) const {
154 if (!pImpl) return "";
156 if (hasAttribute(Attribute::AddressSafety))
157 return "address_safety";
158 if (hasAttribute(Attribute::AlwaysInline))
159 return "alwaysinline";
160 if (hasAttribute(Attribute::ByVal))
162 if (hasAttribute(Attribute::InlineHint))
164 if (hasAttribute(Attribute::InReg))
166 if (hasAttribute(Attribute::MinSize))
168 if (hasAttribute(Attribute::Naked))
170 if (hasAttribute(Attribute::Nest))
172 if (hasAttribute(Attribute::NoAlias))
174 if (hasAttribute(Attribute::NoBuiltin))
176 if (hasAttribute(Attribute::NoCapture))
178 if (hasAttribute(Attribute::NoDuplicate))
179 return "noduplicate";
180 if (hasAttribute(Attribute::NoImplicitFloat))
181 return "noimplicitfloat";
182 if (hasAttribute(Attribute::NoInline))
184 if (hasAttribute(Attribute::NonLazyBind))
185 return "nonlazybind";
186 if (hasAttribute(Attribute::NoRedZone))
188 if (hasAttribute(Attribute::NoReturn))
190 if (hasAttribute(Attribute::NoUnwind))
192 if (hasAttribute(Attribute::OptimizeForSize))
194 if (hasAttribute(Attribute::ReadNone))
196 if (hasAttribute(Attribute::ReadOnly))
198 if (hasAttribute(Attribute::ReturnsTwice))
199 return "returns_twice";
200 if (hasAttribute(Attribute::SExt))
202 if (hasAttribute(Attribute::StackProtect))
204 if (hasAttribute(Attribute::StackProtectReq))
206 if (hasAttribute(Attribute::StackProtectStrong))
208 if (hasAttribute(Attribute::StructRet))
210 if (hasAttribute(Attribute::ThreadSafety))
211 return "thread_safety";
212 if (hasAttribute(Attribute::UninitializedChecks))
213 return "uninitialized_checks";
214 if (hasAttribute(Attribute::UWTable))
216 if (hasAttribute(Attribute::ZExt))
219 // FIXME: These should be output like this:
224 if (hasAttribute(Attribute::Alignment)) {
227 Result += (InAttrGrp) ? "=" : " ";
228 Result += utostr(getValueAsInt());
232 if (hasAttribute(Attribute::StackAlignment)) {
234 Result += "alignstack";
237 Result += utostr(getValueAsInt());
240 Result += utostr(getValueAsInt());
246 // Convert target-dependent attributes to strings of the form:
251 if (isStringAttribute()) {
253 Result += '\"' + getKindAsString().str() + '"';
255 StringRef Val = pImpl->getValueAsString();
256 if (Val.empty()) return Result;
258 Result += "=\"" + Val.str() + '"';
262 llvm_unreachable("Unknown attribute");
265 bool Attribute::operator<(Attribute A) const {
266 if (!pImpl && !A.pImpl) return false;
267 if (!pImpl) return true;
268 if (!A.pImpl) return false;
269 return *pImpl < *A.pImpl;
272 //===----------------------------------------------------------------------===//
273 // AttributeImpl Definition
274 //===----------------------------------------------------------------------===//
276 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind)
277 : Context(C), Entry(new EnumAttributeEntry(Kind)) {}
279 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind,
282 assert((Kind == Attribute::Alignment || Kind == Attribute::StackAlignment) &&
283 "Wrong kind for alignment attribute!");
284 Entry = new AlignAttributeEntry(Kind, Align);
287 AttributeImpl::AttributeImpl(LLVMContext &C, StringRef Kind, StringRef Val)
288 : Context(C), Entry(new StringAttributeEntry(Kind, Val)) {}
290 AttributeImpl::~AttributeImpl() {
294 bool AttributeImpl::isEnumAttribute() const {
295 return isa<EnumAttributeEntry>(Entry);
298 bool AttributeImpl::isAlignAttribute() const {
299 return isa<AlignAttributeEntry>(Entry);
302 bool AttributeImpl::isStringAttribute() const {
303 return isa<StringAttributeEntry>(Entry);
306 bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
307 if (isStringAttribute()) return false;
308 return getKindAsEnum() == A;
311 bool AttributeImpl::hasAttribute(StringRef Kind) const {
312 if (!isStringAttribute()) return false;
313 return getKindAsString() == Kind;
316 Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
317 if (EnumAttributeEntry *E = dyn_cast<EnumAttributeEntry>(Entry))
318 return E->getEnumKind();
319 return cast<AlignAttributeEntry>(Entry)->getEnumKind();
322 uint64_t AttributeImpl::getValueAsInt() const {
323 return cast<AlignAttributeEntry>(Entry)->getAlignment();
326 StringRef AttributeImpl::getKindAsString() const {
327 return cast<StringAttributeEntry>(Entry)->getStringKind();
330 StringRef AttributeImpl::getValueAsString() const {
331 return cast<StringAttributeEntry>(Entry)->getStringValue();
334 bool AttributeImpl::operator<(const AttributeImpl &AI) const {
335 // This sorts the attributes with Attribute::AttrKinds coming first (sorted
336 // relative to their enum value) and then strings.
337 if (isEnumAttribute()) {
338 if (AI.isEnumAttribute()) return getKindAsEnum() < AI.getKindAsEnum();
339 if (AI.isAlignAttribute()) return true;
340 if (AI.isStringAttribute()) return true;
343 if (isAlignAttribute()) {
344 if (AI.isEnumAttribute()) return false;
345 if (AI.isAlignAttribute()) return getValueAsInt() < AI.getValueAsInt();
346 if (AI.isStringAttribute()) return true;
349 if (AI.isEnumAttribute()) return false;
350 if (AI.isAlignAttribute()) return false;
351 if (getKindAsString() == AI.getKindAsString())
352 return getValueAsString() < AI.getValueAsString();
353 return getKindAsString() < AI.getKindAsString();
356 uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
357 // FIXME: Remove this.
359 case Attribute::EndAttrKinds:
360 llvm_unreachable("Synthetic enumerators which should never get here");
362 case Attribute::None: return 0;
363 case Attribute::ZExt: return 1 << 0;
364 case Attribute::SExt: return 1 << 1;
365 case Attribute::NoReturn: return 1 << 2;
366 case Attribute::InReg: return 1 << 3;
367 case Attribute::StructRet: return 1 << 4;
368 case Attribute::NoUnwind: return 1 << 5;
369 case Attribute::NoAlias: return 1 << 6;
370 case Attribute::ByVal: return 1 << 7;
371 case Attribute::Nest: return 1 << 8;
372 case Attribute::ReadNone: return 1 << 9;
373 case Attribute::ReadOnly: return 1 << 10;
374 case Attribute::NoInline: return 1 << 11;
375 case Attribute::AlwaysInline: return 1 << 12;
376 case Attribute::OptimizeForSize: return 1 << 13;
377 case Attribute::StackProtect: return 1 << 14;
378 case Attribute::StackProtectReq: return 1 << 15;
379 case Attribute::Alignment: return 31 << 16;
380 case Attribute::NoCapture: return 1 << 21;
381 case Attribute::NoRedZone: return 1 << 22;
382 case Attribute::NoImplicitFloat: return 1 << 23;
383 case Attribute::Naked: return 1 << 24;
384 case Attribute::InlineHint: return 1 << 25;
385 case Attribute::StackAlignment: return 7 << 26;
386 case Attribute::ReturnsTwice: return 1 << 29;
387 case Attribute::UWTable: return 1 << 30;
388 case Attribute::NonLazyBind: return 1U << 31;
389 case Attribute::AddressSafety: return 1ULL << 32;
390 case Attribute::MinSize: return 1ULL << 33;
391 case Attribute::NoDuplicate: return 1ULL << 34;
392 case Attribute::StackProtectStrong: return 1ULL << 35;
393 case Attribute::ThreadSafety: return 1ULL << 36;
394 case Attribute::UninitializedChecks: return 1ULL << 37;
395 case Attribute::NoBuiltin: return 1ULL << 38;
397 llvm_unreachable("Unsupported attribute type");
400 //===----------------------------------------------------------------------===//
401 // AttributeSetNode Definition
402 //===----------------------------------------------------------------------===//
404 AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
405 ArrayRef<Attribute> Attrs) {
409 // Otherwise, build a key to look up the existing attributes.
410 LLVMContextImpl *pImpl = C.pImpl;
413 SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
414 array_pod_sort(SortedAttrs.begin(), SortedAttrs.end());
416 for (SmallVectorImpl<Attribute>::iterator I = SortedAttrs.begin(),
417 E = SortedAttrs.end(); I != E; ++I)
421 AttributeSetNode *PA =
422 pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
424 // If we didn't find any existing attributes of the same shape then create a
425 // new one and insert it.
427 PA = new AttributeSetNode(SortedAttrs);
428 pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
431 // Return the AttributesListNode that we found or created.
435 bool AttributeSetNode::hasAttribute(Attribute::AttrKind Kind) const {
436 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
437 E = AttrList.end(); I != E; ++I)
438 if (I->hasAttribute(Kind))
443 bool AttributeSetNode::hasAttribute(StringRef Kind) const {
444 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
445 E = AttrList.end(); I != E; ++I)
446 if (I->hasAttribute(Kind))
451 Attribute AttributeSetNode::getAttribute(Attribute::AttrKind Kind) const {
452 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
453 E = AttrList.end(); I != E; ++I)
454 if (I->hasAttribute(Kind))
459 Attribute AttributeSetNode::getAttribute(StringRef Kind) const {
460 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
461 E = AttrList.end(); I != E; ++I)
462 if (I->hasAttribute(Kind))
467 unsigned AttributeSetNode::getAlignment() const {
468 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
469 E = AttrList.end(); I != E; ++I)
470 if (I->hasAttribute(Attribute::Alignment))
471 return I->getAlignment();
475 unsigned AttributeSetNode::getStackAlignment() const {
476 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
477 E = AttrList.end(); I != E; ++I)
478 if (I->hasAttribute(Attribute::StackAlignment))
479 return I->getStackAlignment();
483 std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
484 std::string Str = "";
485 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
486 E = AttrList.end(); I != E; ) {
487 Str += I->getAsString(InAttrGrp);
488 if (++I != E) Str += " ";
493 //===----------------------------------------------------------------------===//
494 // AttributeSetImpl Definition
495 //===----------------------------------------------------------------------===//
497 uint64_t AttributeSetImpl::Raw(uint64_t Index) const {
498 for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
499 if (getSlotIndex(I) != Index) continue;
500 const AttributeSetNode *ASN = AttrNodes[I].second;
503 for (AttributeSetNode::const_iterator II = ASN->begin(),
504 IE = ASN->end(); II != IE; ++II) {
505 Attribute Attr = *II;
507 // This cannot handle string attributes.
508 if (Attr.isStringAttribute()) continue;
510 Attribute::AttrKind Kind = Attr.getKindAsEnum();
512 if (Kind == Attribute::Alignment)
513 Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
514 else if (Kind == Attribute::StackAlignment)
515 Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
517 Mask |= AttributeImpl::getAttrMask(Kind);
526 //===----------------------------------------------------------------------===//
527 // AttributeSet Construction and Mutation Methods
528 //===----------------------------------------------------------------------===//
531 AttributeSet::getImpl(LLVMContext &C,
532 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Attrs) {
533 LLVMContextImpl *pImpl = C.pImpl;
535 AttributeSetImpl::Profile(ID, Attrs);
538 AttributeSetImpl *PA = pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
540 // If we didn't find any existing attributes of the same shape then
541 // create a new one and insert it.
543 PA = new AttributeSetImpl(C, Attrs);
544 pImpl->AttrsLists.InsertNode(PA, InsertPoint);
547 // Return the AttributesList that we found or created.
548 return AttributeSet(PA);
551 AttributeSet AttributeSet::get(LLVMContext &C,
552 ArrayRef<std::pair<unsigned, Attribute> > Attrs){
553 // If there are no attributes then return a null AttributesList pointer.
555 return AttributeSet();
558 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
559 assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
560 "Misordered Attributes list!");
561 assert(!Attrs[i].second.hasAttribute(Attribute::None) &&
562 "Pointless attribute!");
566 // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
568 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
569 for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
570 E = Attrs.end(); I != E; ) {
571 unsigned Index = I->first;
572 SmallVector<Attribute, 4> AttrVec;
573 while (I != E && I->first == Index) {
574 AttrVec.push_back(I->second);
578 AttrPairVec.push_back(std::make_pair(Index,
579 AttributeSetNode::get(C, AttrVec)));
582 return getImpl(C, AttrPairVec);
585 AttributeSet AttributeSet::get(LLVMContext &C,
586 ArrayRef<std::pair<unsigned,
587 AttributeSetNode*> > Attrs) {
588 // If there are no attributes then return a null AttributesList pointer.
590 return AttributeSet();
592 return getImpl(C, Attrs);
595 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx, AttrBuilder &B) {
596 if (!B.hasAttributes())
597 return AttributeSet();
599 // Add target-independent attributes.
600 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
601 for (Attribute::AttrKind Kind = Attribute::None;
602 Kind != Attribute::EndAttrKinds; Kind = Attribute::AttrKind(Kind + 1)) {
603 if (!B.contains(Kind))
606 if (Kind == Attribute::Alignment)
607 Attrs.push_back(std::make_pair(Idx, Attribute::
608 getWithAlignment(C, B.getAlignment())));
609 else if (Kind == Attribute::StackAlignment)
610 Attrs.push_back(std::make_pair(Idx, Attribute::
611 getWithStackAlignment(C, B.getStackAlignment())));
613 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, Kind)));
616 // Add target-dependent (string) attributes.
617 for (AttrBuilder::td_iterator I = B.td_begin(), E = B.td_end();
619 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, I->first,I->second)));
621 return get(C, Attrs);
624 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx,
625 ArrayRef<Attribute::AttrKind> Kind) {
626 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
627 for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
628 E = Kind.end(); I != E; ++I)
629 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, *I)));
630 return get(C, Attrs);
633 AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
634 if (Attrs.empty()) return AttributeSet();
636 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
637 for (unsigned I = 0, E = Attrs.size(); I != E; ++I) {
638 AttributeSet AS = Attrs[I];
639 if (!AS.pImpl) continue;
640 AttrNodeVec.append(AS.pImpl->AttrNodes.begin(), AS.pImpl->AttrNodes.end());
643 return getImpl(C, AttrNodeVec);
646 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Idx,
647 Attribute::AttrKind Attr) const {
648 return addAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
651 AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Idx,
652 AttributeSet Attrs) const {
653 if (!pImpl) return Attrs;
654 if (!Attrs.pImpl) return *this;
657 // FIXME it is not obvious how this should work for alignment. For now, say
658 // we can't change a known alignment.
659 unsigned OldAlign = getParamAlignment(Idx);
660 unsigned NewAlign = Attrs.getParamAlignment(Idx);
661 assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
662 "Attempt to change alignment!");
665 // Add the attribute slots before the one we're trying to add.
666 SmallVector<AttributeSet, 4> AttrSet;
667 uint64_t NumAttrs = pImpl->getNumAttributes();
669 uint64_t LastIndex = 0;
670 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
671 if (getSlotIndex(I) >= Idx) {
672 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
676 AttrSet.push_back(getSlotAttributes(I));
679 // Now add the attribute into the correct slot. There may already be an
680 // AttributeSet there.
681 AttrBuilder B(AS, Idx);
683 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
684 if (Attrs.getSlotIndex(I) == Idx) {
685 for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
686 IE = Attrs.pImpl->end(I); II != IE; ++II)
691 AttrSet.push_back(AttributeSet::get(C, Idx, B));
693 // Add the remaining attribute slots.
694 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
695 AttrSet.push_back(getSlotAttributes(I));
697 return get(C, AttrSet);
700 AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Idx,
701 Attribute::AttrKind Attr) const {
702 return removeAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
705 AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Idx,
706 AttributeSet Attrs) const {
707 if (!pImpl) return AttributeSet();
708 if (!Attrs.pImpl) return *this;
711 // FIXME it is not obvious how this should work for alignment.
712 // For now, say we can't pass in alignment, which no current use does.
713 assert(!Attrs.hasAttribute(Idx, Attribute::Alignment) &&
714 "Attempt to change alignment!");
717 // Add the attribute slots before the one we're trying to add.
718 SmallVector<AttributeSet, 4> AttrSet;
719 uint64_t NumAttrs = pImpl->getNumAttributes();
721 uint64_t LastIndex = 0;
722 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
723 if (getSlotIndex(I) >= Idx) {
724 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
728 AttrSet.push_back(getSlotAttributes(I));
731 // Now remove the attribute from the correct slot. There may already be an
732 // AttributeSet there.
733 AttrBuilder B(AS, Idx);
735 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
736 if (Attrs.getSlotIndex(I) == Idx) {
737 B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Idx);
741 AttrSet.push_back(AttributeSet::get(C, Idx, B));
743 // Add the remaining attribute slots.
744 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
745 AttrSet.push_back(getSlotAttributes(I));
747 return get(C, AttrSet);
750 //===----------------------------------------------------------------------===//
751 // AttributeSet Accessor Methods
752 //===----------------------------------------------------------------------===//
754 LLVMContext &AttributeSet::getContext() const {
755 return pImpl->getContext();
758 AttributeSet AttributeSet::getParamAttributes(unsigned Idx) const {
759 return pImpl && hasAttributes(Idx) ?
760 AttributeSet::get(pImpl->getContext(),
761 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
762 std::make_pair(Idx, getAttributes(Idx)))) :
766 AttributeSet AttributeSet::getRetAttributes() const {
767 return pImpl && hasAttributes(ReturnIndex) ?
768 AttributeSet::get(pImpl->getContext(),
769 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
770 std::make_pair(ReturnIndex,
771 getAttributes(ReturnIndex)))) :
775 AttributeSet AttributeSet::getFnAttributes() const {
776 return pImpl && hasAttributes(FunctionIndex) ?
777 AttributeSet::get(pImpl->getContext(),
778 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
779 std::make_pair(FunctionIndex,
780 getAttributes(FunctionIndex)))) :
784 bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
785 AttributeSetNode *ASN = getAttributes(Index);
786 return ASN ? ASN->hasAttribute(Kind) : false;
789 bool AttributeSet::hasAttribute(unsigned Index, StringRef Kind) const {
790 AttributeSetNode *ASN = getAttributes(Index);
791 return ASN ? ASN->hasAttribute(Kind) : false;
794 bool AttributeSet::hasAttributes(unsigned Index) const {
795 AttributeSetNode *ASN = getAttributes(Index);
796 return ASN ? ASN->hasAttributes() : false;
799 /// \brief Return true if the specified attribute is set for at least one
800 /// parameter or for the return value.
801 bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
802 if (pImpl == 0) return false;
804 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
805 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
806 IE = pImpl->end(I); II != IE; ++II)
807 if (II->hasAttribute(Attr))
813 Attribute AttributeSet::getAttribute(unsigned Index,
814 Attribute::AttrKind Kind) const {
815 AttributeSetNode *ASN = getAttributes(Index);
816 return ASN ? ASN->getAttribute(Kind) : Attribute();
819 Attribute AttributeSet::getAttribute(unsigned Index,
820 StringRef Kind) const {
821 AttributeSetNode *ASN = getAttributes(Index);
822 return ASN ? ASN->getAttribute(Kind) : Attribute();
825 unsigned AttributeSet::getParamAlignment(unsigned Index) const {
826 AttributeSetNode *ASN = getAttributes(Index);
827 return ASN ? ASN->getAlignment() : 0;
830 unsigned AttributeSet::getStackAlignment(unsigned Index) const {
831 AttributeSetNode *ASN = getAttributes(Index);
832 return ASN ? ASN->getStackAlignment() : 0;
835 std::string AttributeSet::getAsString(unsigned Index,
836 bool InAttrGrp) const {
837 AttributeSetNode *ASN = getAttributes(Index);
838 return ASN ? ASN->getAsString(InAttrGrp) : std::string("");
841 /// \brief The attributes for the specified index are returned.
842 AttributeSetNode *AttributeSet::getAttributes(unsigned Idx) const {
843 if (!pImpl) return 0;
845 // Loop through to find the attribute node we want.
846 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
847 if (pImpl->getSlotIndex(I) == Idx)
848 return pImpl->getSlotNode(I);
853 AttributeSet::iterator AttributeSet::begin(unsigned Idx) const {
855 return ArrayRef<Attribute>().begin();
856 return pImpl->begin(Idx);
859 AttributeSet::iterator AttributeSet::end(unsigned Idx) const {
861 return ArrayRef<Attribute>().end();
862 return pImpl->end(Idx);
865 //===----------------------------------------------------------------------===//
866 // AttributeSet Introspection Methods
867 //===----------------------------------------------------------------------===//
869 /// \brief Return the number of slots used in this attribute list. This is the
870 /// number of arguments that have an attribute set on them (including the
871 /// function itself).
872 unsigned AttributeSet::getNumSlots() const {
873 return pImpl ? pImpl->getNumAttributes() : 0;
876 uint64_t AttributeSet::getSlotIndex(unsigned Slot) const {
877 assert(pImpl && Slot < pImpl->getNumAttributes() &&
878 "Slot # out of range!");
879 return pImpl->getSlotIndex(Slot);
882 AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
883 assert(pImpl && Slot < pImpl->getNumAttributes() &&
884 "Slot # out of range!");
885 return pImpl->getSlotAttributes(Slot);
888 uint64_t AttributeSet::Raw(unsigned Index) const {
889 // FIXME: Remove this.
890 return pImpl ? pImpl->Raw(Index) : 0;
893 void AttributeSet::dump() const {
896 for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
897 uint64_t Index = getSlotIndex(i);
903 dbgs() << " => " << getAsString(Index) << " }\n";
909 //===----------------------------------------------------------------------===//
910 // AttrBuilder Method Implementations
911 //===----------------------------------------------------------------------===//
913 AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Idx)
914 : Attrs(0), Alignment(0), StackAlignment(0) {
915 AttributeSetImpl *pImpl = AS.pImpl;
918 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
919 if (pImpl->getSlotIndex(I) != Idx) continue;
921 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
922 IE = pImpl->end(I); II != IE; ++II)
929 void AttrBuilder::clear() {
931 Alignment = StackAlignment = 0;
934 AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
935 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
936 assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
937 "Adding alignment attribute without adding alignment value!");
942 AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
943 if (Attr.isStringAttribute()) {
944 addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
948 Attribute::AttrKind Kind = Attr.getKindAsEnum();
951 if (Kind == Attribute::Alignment)
952 Alignment = Attr.getAlignment();
953 else if (Kind == Attribute::StackAlignment)
954 StackAlignment = Attr.getStackAlignment();
958 AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
959 TargetDepAttrs[A] = V;
963 AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
964 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
967 if (Val == Attribute::Alignment)
969 else if (Val == Attribute::StackAlignment)
975 AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
977 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
978 if (A.getSlotIndex(I) == Index) {
983 assert(Idx != ~0U && "Couldn't find index in AttributeSet!");
985 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx); I != E; ++I) {
987 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
988 Attribute::AttrKind Kind = I->getKindAsEnum();
991 if (Kind == Attribute::Alignment)
993 else if (Kind == Attribute::StackAlignment)
996 assert(Attr.isStringAttribute() && "Invalid attribute type!");
997 std::map<std::string, std::string>::iterator
998 Iter = TargetDepAttrs.find(Attr.getKindAsString());
999 if (Iter != TargetDepAttrs.end())
1000 TargetDepAttrs.erase(Iter);
1007 AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
1008 std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
1009 if (I != TargetDepAttrs.end())
1010 TargetDepAttrs.erase(I);
1014 AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
1015 if (Align == 0) return *this;
1017 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1018 assert(Align <= 0x40000000 && "Alignment too large.");
1020 Attrs[Attribute::Alignment] = true;
1025 AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
1026 // Default alignment, allow the target to define how to align it.
1027 if (Align == 0) return *this;
1029 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1030 assert(Align <= 0x100 && "Alignment too large.");
1032 Attrs[Attribute::StackAlignment] = true;
1033 StackAlignment = Align;
1037 AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
1038 // FIXME: What if both have alignments, but they don't match?!
1040 Alignment = B.Alignment;
1042 if (!StackAlignment)
1043 StackAlignment = B.StackAlignment;
1047 for (td_const_iterator I = B.TargetDepAttrs.begin(),
1048 E = B.TargetDepAttrs.end(); I != E; ++I)
1049 TargetDepAttrs[I->first] = I->second;
1054 bool AttrBuilder::contains(StringRef A) const {
1055 return TargetDepAttrs.find(A) != TargetDepAttrs.end();
1058 bool AttrBuilder::hasAttributes() const {
1059 return !Attrs.none() || !TargetDepAttrs.empty();
1062 bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
1064 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
1065 if (A.getSlotIndex(I) == Index) {
1070 assert(Idx != ~0U && "Couldn't find the index!");
1072 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx);
1074 Attribute Attr = *I;
1075 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
1076 if (Attrs[I->getKindAsEnum()])
1079 assert(Attr.isStringAttribute() && "Invalid attribute kind!");
1080 return TargetDepAttrs.find(Attr.getKindAsString())!=TargetDepAttrs.end();
1087 bool AttrBuilder::hasAlignmentAttr() const {
1088 return Alignment != 0;
1091 bool AttrBuilder::operator==(const AttrBuilder &B) {
1092 if (Attrs != B.Attrs)
1095 for (td_const_iterator I = TargetDepAttrs.begin(),
1096 E = TargetDepAttrs.end(); I != E; ++I)
1097 if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
1100 return Alignment == B.Alignment && StackAlignment == B.StackAlignment;
1103 void AttrBuilder::removeFunctionOnlyAttrs() {
1104 removeAttribute(Attribute::NoReturn)
1105 .removeAttribute(Attribute::NoUnwind)
1106 .removeAttribute(Attribute::ReadNone)
1107 .removeAttribute(Attribute::ReadOnly)
1108 .removeAttribute(Attribute::NoInline)
1109 .removeAttribute(Attribute::AlwaysInline)
1110 .removeAttribute(Attribute::OptimizeForSize)
1111 .removeAttribute(Attribute::StackProtect)
1112 .removeAttribute(Attribute::StackProtectReq)
1113 .removeAttribute(Attribute::StackProtectStrong)
1114 .removeAttribute(Attribute::NoRedZone)
1115 .removeAttribute(Attribute::NoImplicitFloat)
1116 .removeAttribute(Attribute::Naked)
1117 .removeAttribute(Attribute::InlineHint)
1118 .removeAttribute(Attribute::StackAlignment)
1119 .removeAttribute(Attribute::UWTable)
1120 .removeAttribute(Attribute::NonLazyBind)
1121 .removeAttribute(Attribute::ReturnsTwice)
1122 .removeAttribute(Attribute::AddressSafety)
1123 .removeAttribute(Attribute::ThreadSafety)
1124 .removeAttribute(Attribute::UninitializedChecks)
1125 .removeAttribute(Attribute::MinSize)
1126 .removeAttribute(Attribute::NoDuplicate)
1127 .removeAttribute(Attribute::NoBuiltin);
1130 AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
1131 // FIXME: Remove this in 4.0.
1132 if (!Val) return *this;
1134 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1135 I = Attribute::AttrKind(I + 1)) {
1136 if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
1139 if (I == Attribute::Alignment)
1140 Alignment = 1ULL << ((A >> 16) - 1);
1141 else if (I == Attribute::StackAlignment)
1142 StackAlignment = 1ULL << ((A >> 26)-1);
1149 //===----------------------------------------------------------------------===//
1150 // AttributeFuncs Function Defintions
1151 //===----------------------------------------------------------------------===//
1153 /// \brief Which attributes cannot be applied to a type.
1154 AttributeSet AttributeFuncs::typeIncompatible(Type *Ty, uint64_t Index) {
1155 AttrBuilder Incompatible;
1157 if (!Ty->isIntegerTy())
1158 // Attribute that only apply to integers.
1159 Incompatible.addAttribute(Attribute::SExt)
1160 .addAttribute(Attribute::ZExt);
1162 if (!Ty->isPointerTy())
1163 // Attribute that only apply to pointers.
1164 Incompatible.addAttribute(Attribute::ByVal)
1165 .addAttribute(Attribute::Nest)
1166 .addAttribute(Attribute::NoAlias)
1167 .addAttribute(Attribute::NoCapture)
1168 .addAttribute(Attribute::StructRet);
1170 return AttributeSet::get(Ty->getContext(), Index, Incompatible);