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::NoCapture))
176 if (hasAttribute(Attribute::NoDuplicate))
177 return "noduplicate";
178 if (hasAttribute(Attribute::NoImplicitFloat))
179 return "noimplicitfloat";
180 if (hasAttribute(Attribute::NoInline))
182 if (hasAttribute(Attribute::NonLazyBind))
183 return "nonlazybind";
184 if (hasAttribute(Attribute::NoRedZone))
186 if (hasAttribute(Attribute::NoReturn))
188 if (hasAttribute(Attribute::NoUnwind))
190 if (hasAttribute(Attribute::OptimizeForSize))
192 if (hasAttribute(Attribute::ReadNone))
194 if (hasAttribute(Attribute::ReadOnly))
196 if (hasAttribute(Attribute::ReturnsTwice))
197 return "returns_twice";
198 if (hasAttribute(Attribute::SExt))
200 if (hasAttribute(Attribute::StackProtect))
202 if (hasAttribute(Attribute::StackProtectReq))
204 if (hasAttribute(Attribute::StackProtectStrong))
206 if (hasAttribute(Attribute::StructRet))
208 if (hasAttribute(Attribute::ThreadSafety))
209 return "thread_safety";
210 if (hasAttribute(Attribute::UninitializedChecks))
211 return "uninitialized_checks";
212 if (hasAttribute(Attribute::UWTable))
214 if (hasAttribute(Attribute::ZExt))
217 // FIXME: These should be output like this:
222 if (hasAttribute(Attribute::Alignment)) {
225 Result += (InAttrGrp) ? "=" : " ";
226 Result += utostr(getValueAsInt());
230 if (hasAttribute(Attribute::StackAlignment)) {
232 Result += "alignstack";
235 Result += utostr(getValueAsInt());
238 Result += utostr(getValueAsInt());
244 // Convert target-dependent attributes to strings of the form:
249 if (isStringAttribute()) {
251 Result += '\"' + getKindAsString().str() + '"';
253 StringRef Val = pImpl->getValueAsString();
254 if (Val.empty()) return Result;
256 Result += "=\"" + Val.str() + '"';
260 llvm_unreachable("Unknown attribute");
263 bool Attribute::operator<(Attribute A) const {
264 if (!pImpl && !A.pImpl) return false;
265 if (!pImpl) return true;
266 if (!A.pImpl) return false;
267 return *pImpl < *A.pImpl;
270 //===----------------------------------------------------------------------===//
271 // AttributeImpl Definition
272 //===----------------------------------------------------------------------===//
274 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind)
275 : Context(C), Entry(new EnumAttributeEntry(Kind)) {}
277 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind,
280 assert((Kind == Attribute::Alignment || Kind == Attribute::StackAlignment) &&
281 "Wrong kind for alignment attribute!");
282 Entry = new AlignAttributeEntry(Kind, Align);
285 AttributeImpl::AttributeImpl(LLVMContext &C, StringRef Kind, StringRef Val)
286 : Context(C), Entry(new StringAttributeEntry(Kind, Val)) {}
288 AttributeImpl::~AttributeImpl() {
292 bool AttributeImpl::isEnumAttribute() const {
293 return isa<EnumAttributeEntry>(Entry);
296 bool AttributeImpl::isAlignAttribute() const {
297 return isa<AlignAttributeEntry>(Entry);
300 bool AttributeImpl::isStringAttribute() const {
301 return isa<StringAttributeEntry>(Entry);
304 bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
305 if (isStringAttribute()) return false;
306 return getKindAsEnum() == A;
309 bool AttributeImpl::hasAttribute(StringRef Kind) const {
310 if (!isStringAttribute()) return false;
311 return getKindAsString() == Kind;
314 Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
315 if (EnumAttributeEntry *E = dyn_cast<EnumAttributeEntry>(Entry))
316 return E->getEnumKind();
317 return cast<AlignAttributeEntry>(Entry)->getEnumKind();
320 uint64_t AttributeImpl::getValueAsInt() const {
321 return cast<AlignAttributeEntry>(Entry)->getAlignment();
324 StringRef AttributeImpl::getKindAsString() const {
325 return cast<StringAttributeEntry>(Entry)->getStringKind();
328 StringRef AttributeImpl::getValueAsString() const {
329 return cast<StringAttributeEntry>(Entry)->getStringValue();
332 bool AttributeImpl::operator<(const AttributeImpl &AI) const {
333 // This sorts the attributes with Attribute::AttrKinds coming first (sorted
334 // relative to their enum value) and then strings.
335 if (isEnumAttribute()) {
336 if (AI.isEnumAttribute()) return getKindAsEnum() < AI.getKindAsEnum();
337 if (AI.isAlignAttribute()) return true;
338 if (AI.isStringAttribute()) return true;
341 if (isAlignAttribute()) {
342 if (AI.isEnumAttribute()) return false;
343 if (AI.isAlignAttribute()) return getValueAsInt() < AI.getValueAsInt();
344 if (AI.isStringAttribute()) return true;
347 if (AI.isEnumAttribute()) return false;
348 if (AI.isAlignAttribute()) return false;
349 if (getKindAsString() == AI.getKindAsString())
350 return getValueAsString() < AI.getValueAsString();
351 return getKindAsString() < AI.getKindAsString();
354 uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
355 // FIXME: Remove this.
357 case Attribute::EndAttrKinds:
358 case Attribute::AttrKindEmptyKey:
359 case Attribute::AttrKindTombstoneKey:
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;
396 llvm_unreachable("Unsupported attribute type");
399 //===----------------------------------------------------------------------===//
400 // AttributeSetNode Definition
401 //===----------------------------------------------------------------------===//
403 AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
404 ArrayRef<Attribute> Attrs) {
408 // Otherwise, build a key to look up the existing attributes.
409 LLVMContextImpl *pImpl = C.pImpl;
412 SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
413 array_pod_sort(SortedAttrs.begin(), SortedAttrs.end());
415 for (SmallVectorImpl<Attribute>::iterator I = SortedAttrs.begin(),
416 E = SortedAttrs.end(); I != E; ++I)
420 AttributeSetNode *PA =
421 pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
423 // If we didn't find any existing attributes of the same shape then create a
424 // new one and insert it.
426 PA = new AttributeSetNode(SortedAttrs);
427 pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
430 // Return the AttributesListNode that we found or created.
434 bool AttributeSetNode::hasAttribute(Attribute::AttrKind Kind) const {
435 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
436 E = AttrList.end(); I != E; ++I)
437 if (I->hasAttribute(Kind))
442 bool AttributeSetNode::hasAttribute(StringRef Kind) const {
443 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
444 E = AttrList.end(); I != E; ++I)
445 if (I->hasAttribute(Kind))
450 Attribute AttributeSetNode::getAttribute(Attribute::AttrKind Kind) const {
451 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
452 E = AttrList.end(); I != E; ++I)
453 if (I->hasAttribute(Kind))
458 Attribute AttributeSetNode::getAttribute(StringRef Kind) const {
459 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
460 E = AttrList.end(); I != E; ++I)
461 if (I->hasAttribute(Kind))
466 unsigned AttributeSetNode::getAlignment() const {
467 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
468 E = AttrList.end(); I != E; ++I)
469 if (I->hasAttribute(Attribute::Alignment))
470 return I->getAlignment();
474 unsigned AttributeSetNode::getStackAlignment() const {
475 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
476 E = AttrList.end(); I != E; ++I)
477 if (I->hasAttribute(Attribute::StackAlignment))
478 return I->getStackAlignment();
482 std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
483 std::string Str = "";
484 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
485 E = AttrList.end(); I != E; ) {
486 Str += I->getAsString(InAttrGrp);
487 if (++I != E) Str += " ";
492 //===----------------------------------------------------------------------===//
493 // AttributeSetImpl Definition
494 //===----------------------------------------------------------------------===//
496 uint64_t AttributeSetImpl::Raw(uint64_t Index) const {
497 for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
498 if (getSlotIndex(I) != Index) continue;
499 const AttributeSetNode *ASN = AttrNodes[I].second;
502 for (AttributeSetNode::const_iterator II = ASN->begin(),
503 IE = ASN->end(); II != IE; ++II) {
504 Attribute Attr = *II;
506 // This cannot handle string attributes.
507 if (Attr.isStringAttribute()) continue;
509 Attribute::AttrKind Kind = Attr.getKindAsEnum();
511 if (Kind == Attribute::Alignment)
512 Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
513 else if (Kind == Attribute::StackAlignment)
514 Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
516 Mask |= AttributeImpl::getAttrMask(Kind);
525 //===----------------------------------------------------------------------===//
526 // AttributeSet Construction and Mutation Methods
527 //===----------------------------------------------------------------------===//
530 AttributeSet::getImpl(LLVMContext &C,
531 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Attrs) {
532 LLVMContextImpl *pImpl = C.pImpl;
534 AttributeSetImpl::Profile(ID, Attrs);
537 AttributeSetImpl *PA = pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
539 // If we didn't find any existing attributes of the same shape then
540 // create a new one and insert it.
542 PA = new AttributeSetImpl(C, Attrs);
543 pImpl->AttrsLists.InsertNode(PA, InsertPoint);
546 // Return the AttributesList that we found or created.
547 return AttributeSet(PA);
550 AttributeSet AttributeSet::get(LLVMContext &C,
551 ArrayRef<std::pair<unsigned, Attribute> > Attrs){
552 // If there are no attributes then return a null AttributesList pointer.
554 return AttributeSet();
557 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
558 assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
559 "Misordered Attributes list!");
560 assert(!Attrs[i].second.hasAttribute(Attribute::None) &&
561 "Pointless attribute!");
565 // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
567 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
568 for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
569 E = Attrs.end(); I != E; ) {
570 unsigned Index = I->first;
571 SmallVector<Attribute, 4> AttrVec;
572 while (I != E && I->first == Index) {
573 AttrVec.push_back(I->second);
577 AttrPairVec.push_back(std::make_pair(Index,
578 AttributeSetNode::get(C, AttrVec)));
581 return getImpl(C, AttrPairVec);
584 AttributeSet AttributeSet::get(LLVMContext &C,
585 ArrayRef<std::pair<unsigned,
586 AttributeSetNode*> > Attrs) {
587 // If there are no attributes then return a null AttributesList pointer.
589 return AttributeSet();
591 return getImpl(C, Attrs);
594 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx, AttrBuilder &B) {
595 if (!B.hasAttributes())
596 return AttributeSet();
598 // Add target-independent attributes.
599 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
600 for (AttrBuilder::iterator I = B.begin(), E = B.end(); I != E; ++I) {
601 Attribute::AttrKind Kind = *I;
602 if (Kind == Attribute::Alignment)
603 Attrs.push_back(std::make_pair(Idx, Attribute::
604 getWithAlignment(C, B.getAlignment())));
605 else if (Kind == Attribute::StackAlignment)
606 Attrs.push_back(std::make_pair(Idx, Attribute::
607 getWithStackAlignment(C, B.getStackAlignment())));
609 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, Kind)));
612 // Add target-dependent (string) attributes.
613 for (AttrBuilder::td_iterator I = B.td_begin(), E = B.td_end();
615 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, I->first,I->second)));
617 return get(C, Attrs);
620 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx,
621 ArrayRef<Attribute::AttrKind> Kind) {
622 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
623 for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
624 E = Kind.end(); I != E; ++I)
625 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, *I)));
626 return get(C, Attrs);
629 AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
630 if (Attrs.empty()) return AttributeSet();
632 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
633 for (unsigned I = 0, E = Attrs.size(); I != E; ++I) {
634 AttributeSet AS = Attrs[I];
635 if (!AS.pImpl) continue;
636 AttrNodeVec.append(AS.pImpl->AttrNodes.begin(), AS.pImpl->AttrNodes.end());
639 return getImpl(C, AttrNodeVec);
642 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Idx,
643 Attribute::AttrKind Attr) const {
644 return addAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
647 AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Idx,
648 AttributeSet Attrs) const {
649 if (!pImpl) return Attrs;
650 if (!Attrs.pImpl) return *this;
653 // FIXME it is not obvious how this should work for alignment. For now, say
654 // we can't change a known alignment.
655 unsigned OldAlign = getParamAlignment(Idx);
656 unsigned NewAlign = Attrs.getParamAlignment(Idx);
657 assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
658 "Attempt to change alignment!");
661 // Add the attribute slots before the one we're trying to add.
662 SmallVector<AttributeSet, 4> AttrSet;
663 uint64_t NumAttrs = pImpl->getNumAttributes();
665 uint64_t LastIndex = 0;
666 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
667 if (getSlotIndex(I) >= Idx) {
668 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
672 AttrSet.push_back(getSlotAttributes(I));
675 // Now add the attribute into the correct slot. There may already be an
676 // AttributeSet there.
677 AttrBuilder B(AS, Idx);
679 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
680 if (Attrs.getSlotIndex(I) == Idx) {
681 for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
682 IE = Attrs.pImpl->end(I); II != IE; ++II)
687 AttrSet.push_back(AttributeSet::get(C, Idx, B));
689 // Add the remaining attribute slots.
690 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
691 AttrSet.push_back(getSlotAttributes(I));
693 return get(C, AttrSet);
696 AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Idx,
697 Attribute::AttrKind Attr) const {
698 return removeAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
701 AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Idx,
702 AttributeSet Attrs) const {
703 if (!pImpl) return AttributeSet();
704 if (!Attrs.pImpl) return *this;
707 // FIXME it is not obvious how this should work for alignment.
708 // For now, say we can't pass in alignment, which no current use does.
709 assert(!Attrs.hasAttribute(Idx, Attribute::Alignment) &&
710 "Attempt to change alignment!");
713 // Add the attribute slots before the one we're trying to add.
714 SmallVector<AttributeSet, 4> AttrSet;
715 uint64_t NumAttrs = pImpl->getNumAttributes();
717 uint64_t LastIndex = 0;
718 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
719 if (getSlotIndex(I) >= Idx) {
720 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
724 AttrSet.push_back(getSlotAttributes(I));
727 // Now remove the attribute from the correct slot. There may already be an
728 // AttributeSet there.
729 AttrBuilder B(AS, Idx);
731 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
732 if (Attrs.getSlotIndex(I) == Idx) {
733 B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Idx);
737 AttrSet.push_back(AttributeSet::get(C, Idx, B));
739 // Add the remaining attribute slots.
740 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
741 AttrSet.push_back(getSlotAttributes(I));
743 return get(C, AttrSet);
746 //===----------------------------------------------------------------------===//
747 // AttributeSet Accessor Methods
748 //===----------------------------------------------------------------------===//
750 LLVMContext &AttributeSet::getContext() const {
751 return pImpl->getContext();
754 AttributeSet AttributeSet::getParamAttributes(unsigned Idx) const {
755 return pImpl && hasAttributes(Idx) ?
756 AttributeSet::get(pImpl->getContext(),
757 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
758 std::make_pair(Idx, getAttributes(Idx)))) :
762 AttributeSet AttributeSet::getRetAttributes() const {
763 return pImpl && hasAttributes(ReturnIndex) ?
764 AttributeSet::get(pImpl->getContext(),
765 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
766 std::make_pair(ReturnIndex,
767 getAttributes(ReturnIndex)))) :
771 AttributeSet AttributeSet::getFnAttributes() const {
772 return pImpl && hasAttributes(FunctionIndex) ?
773 AttributeSet::get(pImpl->getContext(),
774 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
775 std::make_pair(FunctionIndex,
776 getAttributes(FunctionIndex)))) :
780 bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
781 AttributeSetNode *ASN = getAttributes(Index);
782 return ASN ? ASN->hasAttribute(Kind) : false;
785 bool AttributeSet::hasAttribute(unsigned Index, StringRef Kind) const {
786 AttributeSetNode *ASN = getAttributes(Index);
787 return ASN ? ASN->hasAttribute(Kind) : false;
790 bool AttributeSet::hasAttributes(unsigned Index) const {
791 AttributeSetNode *ASN = getAttributes(Index);
792 return ASN ? ASN->hasAttributes() : false;
795 /// \brief Return true if the specified attribute is set for at least one
796 /// parameter or for the return value.
797 bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
798 if (pImpl == 0) return false;
800 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
801 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
802 IE = pImpl->end(I); II != IE; ++II)
803 if (II->hasAttribute(Attr))
809 Attribute AttributeSet::getAttribute(unsigned Index,
810 Attribute::AttrKind Kind) const {
811 AttributeSetNode *ASN = getAttributes(Index);
812 return ASN ? ASN->getAttribute(Kind) : Attribute();
815 Attribute AttributeSet::getAttribute(unsigned Index,
816 StringRef Kind) const {
817 AttributeSetNode *ASN = getAttributes(Index);
818 return ASN ? ASN->getAttribute(Kind) : Attribute();
821 unsigned AttributeSet::getParamAlignment(unsigned Index) const {
822 AttributeSetNode *ASN = getAttributes(Index);
823 return ASN ? ASN->getAlignment() : 0;
826 unsigned AttributeSet::getStackAlignment(unsigned Index) const {
827 AttributeSetNode *ASN = getAttributes(Index);
828 return ASN ? ASN->getStackAlignment() : 0;
831 std::string AttributeSet::getAsString(unsigned Index,
832 bool InAttrGrp) const {
833 AttributeSetNode *ASN = getAttributes(Index);
834 return ASN ? ASN->getAsString(InAttrGrp) : std::string("");
837 /// \brief The attributes for the specified index are returned.
838 AttributeSetNode *AttributeSet::getAttributes(unsigned Idx) const {
839 if (!pImpl) return 0;
841 // Loop through to find the attribute node we want.
842 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
843 if (pImpl->getSlotIndex(I) == Idx)
844 return pImpl->getSlotNode(I);
849 AttributeSet::iterator AttributeSet::begin(unsigned Idx) const {
851 return ArrayRef<Attribute>().begin();
852 return pImpl->begin(Idx);
855 AttributeSet::iterator AttributeSet::end(unsigned Idx) const {
857 return ArrayRef<Attribute>().end();
858 return pImpl->end(Idx);
861 //===----------------------------------------------------------------------===//
862 // AttributeSet Introspection Methods
863 //===----------------------------------------------------------------------===//
865 /// \brief Return the number of slots used in this attribute list. This is the
866 /// number of arguments that have an attribute set on them (including the
867 /// function itself).
868 unsigned AttributeSet::getNumSlots() const {
869 return pImpl ? pImpl->getNumAttributes() : 0;
872 uint64_t AttributeSet::getSlotIndex(unsigned Slot) const {
873 assert(pImpl && Slot < pImpl->getNumAttributes() &&
874 "Slot # out of range!");
875 return pImpl->getSlotIndex(Slot);
878 AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
879 assert(pImpl && Slot < pImpl->getNumAttributes() &&
880 "Slot # out of range!");
881 return pImpl->getSlotAttributes(Slot);
884 uint64_t AttributeSet::Raw(unsigned Index) const {
885 // FIXME: Remove this.
886 return pImpl ? pImpl->Raw(Index) : 0;
889 void AttributeSet::dump() const {
892 for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
893 uint64_t Index = getSlotIndex(i);
899 dbgs() << " => " << getAsString(Index) << " }\n";
905 //===----------------------------------------------------------------------===//
906 // AttrBuilder Method Implementations
907 //===----------------------------------------------------------------------===//
909 AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Idx)
910 : Alignment(0), StackAlignment(0) {
911 AttributeSetImpl *pImpl = AS.pImpl;
914 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
915 if (pImpl->getSlotIndex(I) != Idx) continue;
917 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
918 IE = pImpl->end(I); II != IE; ++II)
925 void AttrBuilder::clear() {
927 Alignment = StackAlignment = 0;
930 AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
931 assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
932 "Adding alignment attribute without adding alignment value!");
937 AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
938 if (Attr.isStringAttribute()) {
939 addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
943 Attribute::AttrKind Kind = Attr.getKindAsEnum();
946 if (Kind == Attribute::Alignment)
947 Alignment = Attr.getAlignment();
948 else if (Kind == Attribute::StackAlignment)
949 StackAlignment = Attr.getStackAlignment();
953 AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
954 TargetDepAttrs[A] = V;
958 AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
961 if (Val == Attribute::Alignment)
963 else if (Val == Attribute::StackAlignment)
969 AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
971 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
972 if (A.getSlotIndex(I) == Index) {
977 assert(Idx != ~0U && "Couldn't find index in AttributeSet!");
979 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx); I != E; ++I) {
981 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
982 Attribute::AttrKind Kind = I->getKindAsEnum();
985 if (Kind == Attribute::Alignment)
987 else if (Kind == Attribute::StackAlignment)
990 assert(Attr.isStringAttribute() && "Invalid attribute type!");
991 std::map<std::string, std::string>::iterator
992 Iter = TargetDepAttrs.find(Attr.getKindAsString());
993 if (Iter != TargetDepAttrs.end())
994 TargetDepAttrs.erase(Iter);
1001 AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
1002 std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
1003 if (I != TargetDepAttrs.end())
1004 TargetDepAttrs.erase(I);
1008 AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
1009 if (Align == 0) return *this;
1011 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1012 assert(Align <= 0x40000000 && "Alignment too large.");
1014 Attrs.insert(Attribute::Alignment);
1019 AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
1020 // Default alignment, allow the target to define how to align it.
1021 if (Align == 0) return *this;
1023 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1024 assert(Align <= 0x100 && "Alignment too large.");
1026 Attrs.insert(Attribute::StackAlignment);
1027 StackAlignment = Align;
1031 AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
1032 // FIXME: What if both have alignments, but they don't match?!
1034 Alignment = B.Alignment;
1036 if (!StackAlignment)
1037 StackAlignment = B.StackAlignment;
1039 Attrs.insert(B.Attrs.begin(), B.Attrs.end());
1041 for (td_const_iterator I = B.TargetDepAttrs.begin(),
1042 E = B.TargetDepAttrs.end(); I != E; ++I)
1043 TargetDepAttrs[I->first] = I->second;
1048 bool AttrBuilder::contains(Attribute::AttrKind A) const {
1049 return Attrs.count(A);
1052 bool AttrBuilder::contains(StringRef A) const {
1053 return TargetDepAttrs.find(A) != TargetDepAttrs.end();
1056 bool AttrBuilder::hasAttributes() const {
1057 return !Attrs.empty() || !TargetDepAttrs.empty();
1060 bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
1062 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
1063 if (A.getSlotIndex(I) == Index) {
1068 assert(Idx != ~0U && "Couldn't find the index!");
1070 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx);
1072 Attribute Attr = *I;
1073 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
1074 if (Attrs.count(I->getKindAsEnum()))
1077 assert(Attr.isStringAttribute() && "Invalid attribute kind!");
1078 return TargetDepAttrs.find(Attr.getKindAsString())!=TargetDepAttrs.end();
1085 bool AttrBuilder::hasAlignmentAttr() const {
1086 return Alignment != 0;
1089 bool AttrBuilder::operator==(const AttrBuilder &B) {
1090 for (DenseSet<Attribute::AttrKind>::iterator I = Attrs.begin(),
1091 E = Attrs.end(); I != E; ++I)
1092 if (!B.Attrs.count(*I))
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 AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
1104 // FIXME: Remove this in 4.0.
1105 if (!Val) return *this;
1107 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1108 I = Attribute::AttrKind(I + 1)) {
1109 if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
1112 if (I == Attribute::Alignment)
1113 Alignment = 1ULL << ((A >> 16) - 1);
1114 else if (I == Attribute::StackAlignment)
1115 StackAlignment = 1ULL << ((A >> 26)-1);
1122 //===----------------------------------------------------------------------===//
1123 // AttributeFuncs Function Defintions
1124 //===----------------------------------------------------------------------===//
1126 /// \brief Which attributes cannot be applied to a type.
1127 AttributeSet AttributeFuncs::typeIncompatible(Type *Ty, uint64_t Index) {
1128 AttrBuilder Incompatible;
1130 if (!Ty->isIntegerTy())
1131 // Attribute that only apply to integers.
1132 Incompatible.addAttribute(Attribute::SExt)
1133 .addAttribute(Attribute::ZExt);
1135 if (!Ty->isPointerTy())
1136 // Attribute that only apply to pointers.
1137 Incompatible.addAttribute(Attribute::ByVal)
1138 .addAttribute(Attribute::Nest)
1139 .addAttribute(Attribute::NoAlias)
1140 .addAttribute(Attribute::NoCapture)
1141 .addAttribute(Attribute::StructRet);
1143 return AttributeSet::get(Ty->getContext(), Index, Incompatible);