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::SanitizeAddress))
157 return "sanitize_address";
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::SanitizeThread))
211 return "sanitize_thread";
212 if (hasAttribute(Attribute::SanitizeMemory))
213 return "sanitize_memory";
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::SanitizeAddress: 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::SanitizeThread: return 1ULL << 36;
394 case Attribute::SanitizeMemory: 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 TargetIndependent,
484 bool InAttrGrp) const {
485 std::string Str = "";
486 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
487 E = AttrList.end(); I != E; ) {
488 if (TargetIndependent || !I->isStringAttribute()) {
489 Str += I->getAsString(InAttrGrp);
490 if (++I != E) Str += " ";
498 //===----------------------------------------------------------------------===//
499 // AttributeSetImpl Definition
500 //===----------------------------------------------------------------------===//
502 uint64_t AttributeSetImpl::Raw(uint64_t Index) const {
503 for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
504 if (getSlotIndex(I) != Index) continue;
505 const AttributeSetNode *ASN = AttrNodes[I].second;
508 for (AttributeSetNode::const_iterator II = ASN->begin(),
509 IE = ASN->end(); II != IE; ++II) {
510 Attribute Attr = *II;
512 // This cannot handle string attributes.
513 if (Attr.isStringAttribute()) continue;
515 Attribute::AttrKind Kind = Attr.getKindAsEnum();
517 if (Kind == Attribute::Alignment)
518 Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
519 else if (Kind == Attribute::StackAlignment)
520 Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
522 Mask |= AttributeImpl::getAttrMask(Kind);
531 //===----------------------------------------------------------------------===//
532 // AttributeSet Construction and Mutation Methods
533 //===----------------------------------------------------------------------===//
536 AttributeSet::getImpl(LLVMContext &C,
537 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Attrs) {
538 LLVMContextImpl *pImpl = C.pImpl;
540 AttributeSetImpl::Profile(ID, Attrs);
543 AttributeSetImpl *PA = pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
545 // If we didn't find any existing attributes of the same shape then
546 // create a new one and insert it.
548 PA = new AttributeSetImpl(C, Attrs);
549 pImpl->AttrsLists.InsertNode(PA, InsertPoint);
552 // Return the AttributesList that we found or created.
553 return AttributeSet(PA);
556 AttributeSet AttributeSet::get(LLVMContext &C,
557 ArrayRef<std::pair<unsigned, Attribute> > Attrs){
558 // If there are no attributes then return a null AttributesList pointer.
560 return AttributeSet();
563 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
564 assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
565 "Misordered Attributes list!");
566 assert(!Attrs[i].second.hasAttribute(Attribute::None) &&
567 "Pointless attribute!");
571 // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
573 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
574 for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
575 E = Attrs.end(); I != E; ) {
576 unsigned Index = I->first;
577 SmallVector<Attribute, 4> AttrVec;
578 while (I != E && I->first == Index) {
579 AttrVec.push_back(I->second);
583 AttrPairVec.push_back(std::make_pair(Index,
584 AttributeSetNode::get(C, AttrVec)));
587 return getImpl(C, AttrPairVec);
590 AttributeSet AttributeSet::get(LLVMContext &C,
591 ArrayRef<std::pair<unsigned,
592 AttributeSetNode*> > Attrs) {
593 // If there are no attributes then return a null AttributesList pointer.
595 return AttributeSet();
597 return getImpl(C, Attrs);
600 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index, AttrBuilder &B) {
601 if (!B.hasAttributes())
602 return AttributeSet();
604 // Add target-independent attributes.
605 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
606 for (Attribute::AttrKind Kind = Attribute::None;
607 Kind != Attribute::EndAttrKinds; Kind = Attribute::AttrKind(Kind + 1)) {
608 if (!B.contains(Kind))
611 if (Kind == Attribute::Alignment)
612 Attrs.push_back(std::make_pair(Index, Attribute::
613 getWithAlignment(C, B.getAlignment())));
614 else if (Kind == Attribute::StackAlignment)
615 Attrs.push_back(std::make_pair(Index, Attribute::
616 getWithStackAlignment(C, B.getStackAlignment())));
618 Attrs.push_back(std::make_pair(Index, Attribute::get(C, Kind)));
621 // Add target-dependent (string) attributes.
622 for (AttrBuilder::td_iterator I = B.td_begin(), E = B.td_end();
624 Attrs.push_back(std::make_pair(Index, Attribute::get(C, I->first,I->second)));
626 return get(C, Attrs);
629 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index,
630 ArrayRef<Attribute::AttrKind> Kind) {
631 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
632 for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
633 E = Kind.end(); I != E; ++I)
634 Attrs.push_back(std::make_pair(Index, Attribute::get(C, *I)));
635 return get(C, Attrs);
638 AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
639 if (Attrs.empty()) return AttributeSet();
641 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
642 for (unsigned I = 0, E = Attrs.size(); I != E; ++I) {
643 AttributeSet AS = Attrs[I];
644 if (!AS.pImpl) continue;
645 AttrNodeVec.append(AS.pImpl->AttrNodes.begin(), AS.pImpl->AttrNodes.end());
648 return getImpl(C, AttrNodeVec);
651 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Index,
652 Attribute::AttrKind Attr) const {
653 if (hasAttribute(Index, Attr)) return *this;
654 return addAttributes(C, Index, AttributeSet::get(C, Index, Attr));
657 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Index,
658 StringRef Kind) const {
660 B.addAttribute(Kind);
661 return addAttributes(C, Index, AttributeSet::get(C, Index, B));
664 AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Index,
665 AttributeSet Attrs) const {
666 if (!pImpl) return Attrs;
667 if (!Attrs.pImpl) return *this;
670 // FIXME it is not obvious how this should work for alignment. For now, say
671 // we can't change a known alignment.
672 unsigned OldAlign = getParamAlignment(Index);
673 unsigned NewAlign = Attrs.getParamAlignment(Index);
674 assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
675 "Attempt to change alignment!");
678 // Add the attribute slots before the one we're trying to add.
679 SmallVector<AttributeSet, 4> AttrSet;
680 uint64_t NumAttrs = pImpl->getNumAttributes();
682 uint64_t LastIndex = 0;
683 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
684 if (getSlotIndex(I) >= Index) {
685 if (getSlotIndex(I) == Index) AS = getSlotAttributes(LastIndex++);
689 AttrSet.push_back(getSlotAttributes(I));
692 // Now add the attribute into the correct slot. There may already be an
693 // AttributeSet there.
694 AttrBuilder B(AS, Index);
696 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
697 if (Attrs.getSlotIndex(I) == Index) {
698 for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
699 IE = Attrs.pImpl->end(I); II != IE; ++II)
704 AttrSet.push_back(AttributeSet::get(C, Index, B));
706 // Add the remaining attribute slots.
707 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
708 AttrSet.push_back(getSlotAttributes(I));
710 return get(C, AttrSet);
713 AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Index,
714 Attribute::AttrKind Attr) const {
715 if (!hasAttribute(Index, Attr)) return *this;
716 return removeAttributes(C, Index, AttributeSet::get(C, Index, Attr));
719 AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Index,
720 AttributeSet Attrs) const {
721 if (!pImpl) return AttributeSet();
722 if (!Attrs.pImpl) return *this;
725 // FIXME it is not obvious how this should work for alignment.
726 // For now, say we can't pass in alignment, which no current use does.
727 assert(!Attrs.hasAttribute(Index, Attribute::Alignment) &&
728 "Attempt to change alignment!");
731 // Add the attribute slots before the one we're trying to add.
732 SmallVector<AttributeSet, 4> AttrSet;
733 uint64_t NumAttrs = pImpl->getNumAttributes();
735 uint64_t LastIndex = 0;
736 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
737 if (getSlotIndex(I) >= Index) {
738 if (getSlotIndex(I) == Index) AS = getSlotAttributes(LastIndex++);
742 AttrSet.push_back(getSlotAttributes(I));
745 // Now remove the attribute from the correct slot. There may already be an
746 // AttributeSet there.
747 AttrBuilder B(AS, Index);
749 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
750 if (Attrs.getSlotIndex(I) == Index) {
751 B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Index);
755 AttrSet.push_back(AttributeSet::get(C, Index, B));
757 // Add the remaining attribute slots.
758 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
759 AttrSet.push_back(getSlotAttributes(I));
761 return get(C, AttrSet);
764 //===----------------------------------------------------------------------===//
765 // AttributeSet Accessor Methods
766 //===----------------------------------------------------------------------===//
768 LLVMContext &AttributeSet::getContext() const {
769 return pImpl->getContext();
772 AttributeSet AttributeSet::getParamAttributes(unsigned Index) const {
773 return pImpl && hasAttributes(Index) ?
774 AttributeSet::get(pImpl->getContext(),
775 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
776 std::make_pair(Index, getAttributes(Index)))) :
780 AttributeSet AttributeSet::getRetAttributes() const {
781 return pImpl && hasAttributes(ReturnIndex) ?
782 AttributeSet::get(pImpl->getContext(),
783 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
784 std::make_pair(ReturnIndex,
785 getAttributes(ReturnIndex)))) :
789 AttributeSet AttributeSet::getFnAttributes() const {
790 return pImpl && hasAttributes(FunctionIndex) ?
791 AttributeSet::get(pImpl->getContext(),
792 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
793 std::make_pair(FunctionIndex,
794 getAttributes(FunctionIndex)))) :
798 bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
799 AttributeSetNode *ASN = getAttributes(Index);
800 return ASN ? ASN->hasAttribute(Kind) : false;
803 bool AttributeSet::hasAttribute(unsigned Index, StringRef Kind) const {
804 AttributeSetNode *ASN = getAttributes(Index);
805 return ASN ? ASN->hasAttribute(Kind) : false;
808 bool AttributeSet::hasAttributes(unsigned Index) const {
809 AttributeSetNode *ASN = getAttributes(Index);
810 return ASN ? ASN->hasAttributes() : false;
813 /// \brief Return true if the specified attribute is set for at least one
814 /// parameter or for the return value.
815 bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
816 if (pImpl == 0) return false;
818 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
819 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
820 IE = pImpl->end(I); II != IE; ++II)
821 if (II->hasAttribute(Attr))
827 Attribute AttributeSet::getAttribute(unsigned Index,
828 Attribute::AttrKind Kind) const {
829 AttributeSetNode *ASN = getAttributes(Index);
830 return ASN ? ASN->getAttribute(Kind) : Attribute();
833 Attribute AttributeSet::getAttribute(unsigned Index,
834 StringRef Kind) const {
835 AttributeSetNode *ASN = getAttributes(Index);
836 return ASN ? ASN->getAttribute(Kind) : Attribute();
839 unsigned AttributeSet::getParamAlignment(unsigned Index) const {
840 AttributeSetNode *ASN = getAttributes(Index);
841 return ASN ? ASN->getAlignment() : 0;
844 unsigned AttributeSet::getStackAlignment(unsigned Index) const {
845 AttributeSetNode *ASN = getAttributes(Index);
846 return ASN ? ASN->getStackAlignment() : 0;
849 std::string AttributeSet::getAsString(unsigned Index, bool TargetIndependent,
850 bool InAttrGrp) const {
851 AttributeSetNode *ASN = getAttributes(Index);
852 return ASN ? ASN->getAsString(TargetIndependent, InAttrGrp) :
856 /// \brief The attributes for the specified index are returned.
857 AttributeSetNode *AttributeSet::getAttributes(unsigned Index) const {
858 if (!pImpl) return 0;
860 // Loop through to find the attribute node we want.
861 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
862 if (pImpl->getSlotIndex(I) == Index)
863 return pImpl->getSlotNode(I);
868 AttributeSet::iterator AttributeSet::begin(unsigned Slot) const {
870 return ArrayRef<Attribute>().begin();
871 return pImpl->begin(Slot);
874 AttributeSet::iterator AttributeSet::end(unsigned Slot) const {
876 return ArrayRef<Attribute>().end();
877 return pImpl->end(Slot);
880 //===----------------------------------------------------------------------===//
881 // AttributeSet Introspection Methods
882 //===----------------------------------------------------------------------===//
884 /// \brief Return the number of slots used in this attribute list. This is the
885 /// number of arguments that have an attribute set on them (including the
886 /// function itself).
887 unsigned AttributeSet::getNumSlots() const {
888 return pImpl ? pImpl->getNumAttributes() : 0;
891 uint64_t AttributeSet::getSlotIndex(unsigned Slot) const {
892 assert(pImpl && Slot < pImpl->getNumAttributes() &&
893 "Slot # out of range!");
894 return pImpl->getSlotIndex(Slot);
897 AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
898 assert(pImpl && Slot < pImpl->getNumAttributes() &&
899 "Slot # out of range!");
900 return pImpl->getSlotAttributes(Slot);
903 uint64_t AttributeSet::Raw(unsigned Index) const {
904 // FIXME: Remove this.
905 return pImpl ? pImpl->Raw(Index) : 0;
908 void AttributeSet::dump() const {
911 for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
912 uint64_t Index = getSlotIndex(i);
918 dbgs() << " => " << getAsString(Index) << " }\n";
924 //===----------------------------------------------------------------------===//
925 // AttrBuilder Method Implementations
926 //===----------------------------------------------------------------------===//
928 AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Index)
929 : Attrs(0), Alignment(0), StackAlignment(0) {
930 AttributeSetImpl *pImpl = AS.pImpl;
933 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
934 if (pImpl->getSlotIndex(I) != Index) continue;
936 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
937 IE = pImpl->end(I); II != IE; ++II)
944 void AttrBuilder::clear() {
946 Alignment = StackAlignment = 0;
949 AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
950 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
951 assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
952 "Adding alignment attribute without adding alignment value!");
957 AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
958 if (Attr.isStringAttribute()) {
959 addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
963 Attribute::AttrKind Kind = Attr.getKindAsEnum();
966 if (Kind == Attribute::Alignment)
967 Alignment = Attr.getAlignment();
968 else if (Kind == Attribute::StackAlignment)
969 StackAlignment = Attr.getStackAlignment();
973 AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
974 TargetDepAttrs[A] = V;
978 AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
979 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
982 if (Val == Attribute::Alignment)
984 else if (Val == Attribute::StackAlignment)
990 AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
992 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
993 if (A.getSlotIndex(I) == Index) {
998 assert(Slot != ~0U && "Couldn't find index in AttributeSet!");
1000 for (AttributeSet::iterator I = A.begin(Slot), E = A.end(Slot); I != E; ++I) {
1001 Attribute Attr = *I;
1002 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
1003 Attribute::AttrKind Kind = I->getKindAsEnum();
1004 Attrs[Kind] = false;
1006 if (Kind == Attribute::Alignment)
1008 else if (Kind == Attribute::StackAlignment)
1011 assert(Attr.isStringAttribute() && "Invalid attribute type!");
1012 std::map<std::string, std::string>::iterator
1013 Iter = TargetDepAttrs.find(Attr.getKindAsString());
1014 if (Iter != TargetDepAttrs.end())
1015 TargetDepAttrs.erase(Iter);
1022 AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
1023 std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
1024 if (I != TargetDepAttrs.end())
1025 TargetDepAttrs.erase(I);
1029 AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
1030 if (Align == 0) return *this;
1032 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1033 assert(Align <= 0x40000000 && "Alignment too large.");
1035 Attrs[Attribute::Alignment] = true;
1040 AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
1041 // Default alignment, allow the target to define how to align it.
1042 if (Align == 0) return *this;
1044 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1045 assert(Align <= 0x100 && "Alignment too large.");
1047 Attrs[Attribute::StackAlignment] = true;
1048 StackAlignment = Align;
1052 AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
1053 // FIXME: What if both have alignments, but they don't match?!
1055 Alignment = B.Alignment;
1057 if (!StackAlignment)
1058 StackAlignment = B.StackAlignment;
1062 for (td_const_iterator I = B.TargetDepAttrs.begin(),
1063 E = B.TargetDepAttrs.end(); I != E; ++I)
1064 TargetDepAttrs[I->first] = I->second;
1069 bool AttrBuilder::contains(StringRef A) const {
1070 return TargetDepAttrs.find(A) != TargetDepAttrs.end();
1073 bool AttrBuilder::hasAttributes() const {
1074 return !Attrs.none() || !TargetDepAttrs.empty();
1077 bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
1078 unsigned Slot = ~0U;
1079 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
1080 if (A.getSlotIndex(I) == Index) {
1085 assert(Slot != ~0U && "Couldn't find the index!");
1087 for (AttributeSet::iterator I = A.begin(Slot), E = A.end(Slot);
1089 Attribute Attr = *I;
1090 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
1091 if (Attrs[I->getKindAsEnum()])
1094 assert(Attr.isStringAttribute() && "Invalid attribute kind!");
1095 return TargetDepAttrs.find(Attr.getKindAsString())!=TargetDepAttrs.end();
1102 bool AttrBuilder::hasAlignmentAttr() const {
1103 return Alignment != 0;
1106 bool AttrBuilder::operator==(const AttrBuilder &B) {
1107 if (Attrs != B.Attrs)
1110 for (td_const_iterator I = TargetDepAttrs.begin(),
1111 E = TargetDepAttrs.end(); I != E; ++I)
1112 if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
1115 return Alignment == B.Alignment && StackAlignment == B.StackAlignment;
1118 AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
1119 // FIXME: Remove this in 4.0.
1120 if (!Val) return *this;
1122 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1123 I = Attribute::AttrKind(I + 1)) {
1124 if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
1127 if (I == Attribute::Alignment)
1128 Alignment = 1ULL << ((A >> 16) - 1);
1129 else if (I == Attribute::StackAlignment)
1130 StackAlignment = 1ULL << ((A >> 26)-1);
1137 //===----------------------------------------------------------------------===//
1138 // AttributeFuncs Function Defintions
1139 //===----------------------------------------------------------------------===//
1141 /// \brief Which attributes cannot be applied to a type.
1142 AttributeSet AttributeFuncs::typeIncompatible(Type *Ty, uint64_t Index) {
1143 AttrBuilder Incompatible;
1145 if (!Ty->isIntegerTy())
1146 // Attribute that only apply to integers.
1147 Incompatible.addAttribute(Attribute::SExt)
1148 .addAttribute(Attribute::ZExt);
1150 if (!Ty->isPointerTy())
1151 // Attribute that only apply to pointers.
1152 Incompatible.addAttribute(Attribute::ByVal)
1153 .addAttribute(Attribute::Nest)
1154 .addAttribute(Attribute::NoAlias)
1155 .addAttribute(Attribute::NoCapture)
1156 .addAttribute(Attribute::StructRet);
1158 return AttributeSet::get(Ty->getContext(), Index, Incompatible);