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() 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::UWTable))
210 if (hasAttribute(Attribute::ZExt))
213 // FIXME: These should be output like this:
218 if (hasAttribute(Attribute::Alignment)) {
221 Result += utostr(getValueAsInt());
224 if (hasAttribute(Attribute::StackAlignment)) {
226 Result += "alignstack(";
227 Result += utostr(getValueAsInt());
232 // Convert target-dependent attributes to strings of the form:
236 // "kind" = ( "value1" "value2" "value3" )
238 if (isStringAttribute()) {
240 Result += '\"' + getKindAsString().str() + '"';
242 StringRef Val = pImpl->getValueAsString();
243 if (Val.empty()) return Result;
246 Result += '\"' + Val.str() + '"';
250 llvm_unreachable("Unknown attribute");
253 bool Attribute::operator<(Attribute A) const {
254 if (!pImpl && !A.pImpl) return false;
255 if (!pImpl) return true;
256 if (!A.pImpl) return false;
257 return *pImpl < *A.pImpl;
260 //===----------------------------------------------------------------------===//
261 // AttributeImpl Definition
262 //===----------------------------------------------------------------------===//
264 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind)
265 : Context(C), Entry(new EnumAttributeEntry(Kind)) {}
267 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind,
270 assert((Kind == Attribute::Alignment || Kind == Attribute::StackAlignment) &&
271 "Wrong kind for alignment attribute!");
272 Entry = new AlignAttributeEntry(Kind, Align);
275 AttributeImpl::AttributeImpl(LLVMContext &C, StringRef Kind, StringRef Val)
276 : Context(C), Entry(new StringAttributeEntry(Kind, Val)) {}
278 AttributeImpl::~AttributeImpl() {
282 bool AttributeImpl::isEnumAttribute() const {
283 return isa<EnumAttributeEntry>(Entry);
286 bool AttributeImpl::isAlignAttribute() const {
287 return isa<AlignAttributeEntry>(Entry);
290 bool AttributeImpl::isStringAttribute() const {
291 return isa<StringAttributeEntry>(Entry);
294 bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
295 if (isStringAttribute()) return false;
296 return getKindAsEnum() == A;
299 bool AttributeImpl::hasAttribute(StringRef Kind) const {
300 if (!isStringAttribute()) return false;
301 return getKindAsString() == Kind;
304 Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
305 if (EnumAttributeEntry *E = dyn_cast<EnumAttributeEntry>(Entry))
306 return E->getEnumKind();
307 return cast<AlignAttributeEntry>(Entry)->getEnumKind();
310 uint64_t AttributeImpl::getValueAsInt() const {
311 return cast<AlignAttributeEntry>(Entry)->getAlignment();
314 StringRef AttributeImpl::getKindAsString() const {
315 return cast<StringAttributeEntry>(Entry)->getStringKind();
318 StringRef AttributeImpl::getValueAsString() const {
319 return cast<StringAttributeEntry>(Entry)->getStringValue();
322 bool AttributeImpl::operator<(const AttributeImpl &AI) const {
323 // This sorts the attributes with Attribute::AttrKinds coming first (sorted
324 // relative to their enum value) and then strings.
325 if (isEnumAttribute())
326 if (AI.isAlignAttribute() || AI.isEnumAttribute())
327 return getKindAsEnum() < AI.getKindAsEnum();
329 if (isAlignAttribute()) {
330 if (!AI.isStringAttribute() && getKindAsEnum() < AI.getKindAsEnum())
332 if (AI.isAlignAttribute())
333 return getValueAsInt() < AI.getValueAsInt();
336 if (isStringAttribute()) {
337 if (!AI.isStringAttribute()) return false;
338 if (getKindAsString() < AI.getKindAsString()) return true;
339 if (getKindAsString() == AI.getKindAsString())
340 return getValueAsString() < AI.getValueAsString();
346 uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
347 // FIXME: Remove this.
349 case Attribute::EndAttrKinds:
350 case Attribute::AttrKindEmptyKey:
351 case Attribute::AttrKindTombstoneKey:
352 llvm_unreachable("Synthetic enumerators which should never get here");
354 case Attribute::None: return 0;
355 case Attribute::ZExt: return 1 << 0;
356 case Attribute::SExt: return 1 << 1;
357 case Attribute::NoReturn: return 1 << 2;
358 case Attribute::InReg: return 1 << 3;
359 case Attribute::StructRet: return 1 << 4;
360 case Attribute::NoUnwind: return 1 << 5;
361 case Attribute::NoAlias: return 1 << 6;
362 case Attribute::ByVal: return 1 << 7;
363 case Attribute::Nest: return 1 << 8;
364 case Attribute::ReadNone: return 1 << 9;
365 case Attribute::ReadOnly: return 1 << 10;
366 case Attribute::NoInline: return 1 << 11;
367 case Attribute::AlwaysInline: return 1 << 12;
368 case Attribute::OptimizeForSize: return 1 << 13;
369 case Attribute::StackProtect: return 1 << 14;
370 case Attribute::StackProtectReq: return 1 << 15;
371 case Attribute::Alignment: return 31 << 16;
372 case Attribute::NoCapture: return 1 << 21;
373 case Attribute::NoRedZone: return 1 << 22;
374 case Attribute::NoImplicitFloat: return 1 << 23;
375 case Attribute::Naked: return 1 << 24;
376 case Attribute::InlineHint: return 1 << 25;
377 case Attribute::StackAlignment: return 7 << 26;
378 case Attribute::ReturnsTwice: return 1 << 29;
379 case Attribute::UWTable: return 1 << 30;
380 case Attribute::NonLazyBind: return 1U << 31;
381 case Attribute::AddressSafety: return 1ULL << 32;
382 case Attribute::MinSize: return 1ULL << 33;
383 case Attribute::NoDuplicate: return 1ULL << 34;
384 case Attribute::StackProtectStrong: return 1ULL << 35;
386 llvm_unreachable("Unsupported attribute type");
389 //===----------------------------------------------------------------------===//
390 // AttributeSetNode Definition
391 //===----------------------------------------------------------------------===//
393 AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
394 ArrayRef<Attribute> Attrs) {
398 // Otherwise, build a key to look up the existing attributes.
399 LLVMContextImpl *pImpl = C.pImpl;
402 SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
403 std::sort(SortedAttrs.begin(), SortedAttrs.end());
405 for (SmallVectorImpl<Attribute>::iterator I = SortedAttrs.begin(),
406 E = SortedAttrs.end(); I != E; ++I)
410 AttributeSetNode *PA =
411 pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
413 // If we didn't find any existing attributes of the same shape then create a
414 // new one and insert it.
416 PA = new AttributeSetNode(SortedAttrs);
417 pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
420 // Return the AttributesListNode that we found or created.
424 bool AttributeSetNode::hasAttribute(Attribute::AttrKind Kind) const {
425 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
426 E = AttrList.end(); I != E; ++I)
427 if (I->hasAttribute(Kind))
432 unsigned AttributeSetNode::getAlignment() const {
433 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
434 E = AttrList.end(); I != E; ++I)
435 if (I->hasAttribute(Attribute::Alignment))
436 return I->getAlignment();
440 unsigned AttributeSetNode::getStackAlignment() const {
441 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
442 E = AttrList.end(); I != E; ++I)
443 if (I->hasAttribute(Attribute::StackAlignment))
444 return I->getStackAlignment();
448 std::string AttributeSetNode::getAsString() const {
449 std::string Str = "";
450 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
451 E = AttrList.end(); I != E; ) {
452 Str += I->getAsString();
453 if (++I != E) Str += " ";
458 //===----------------------------------------------------------------------===//
459 // AttributeSetImpl Definition
460 //===----------------------------------------------------------------------===//
462 uint64_t AttributeSetImpl::Raw(uint64_t Index) const {
463 for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
464 if (getSlotIndex(I) != Index) continue;
465 const AttributeSetNode *ASN = AttrNodes[I].second;
468 for (AttributeSetNode::const_iterator II = ASN->begin(),
469 IE = ASN->end(); II != IE; ++II) {
470 Attribute Attr = *II;
472 // This cannot handle string attributes.
473 if (Attr.isStringAttribute()) continue;
475 Attribute::AttrKind Kind = Attr.getKindAsEnum();
477 if (Kind == Attribute::Alignment)
478 Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
479 else if (Kind == Attribute::StackAlignment)
480 Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
482 Mask |= AttributeImpl::getAttrMask(Kind);
491 //===----------------------------------------------------------------------===//
492 // AttributeSet Construction and Mutation Methods
493 //===----------------------------------------------------------------------===//
496 AttributeSet::getImpl(LLVMContext &C,
497 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Attrs) {
498 LLVMContextImpl *pImpl = C.pImpl;
500 AttributeSetImpl::Profile(ID, Attrs);
503 AttributeSetImpl *PA = pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
505 // If we didn't find any existing attributes of the same shape then
506 // create a new one and insert it.
508 PA = new AttributeSetImpl(C, Attrs);
509 pImpl->AttrsLists.InsertNode(PA, InsertPoint);
512 // Return the AttributesList that we found or created.
513 return AttributeSet(PA);
516 AttributeSet AttributeSet::get(LLVMContext &C,
517 ArrayRef<std::pair<unsigned, Attribute> > Attrs){
518 // If there are no attributes then return a null AttributesList pointer.
520 return AttributeSet();
523 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
524 assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
525 "Misordered Attributes list!");
526 assert(!Attrs[i].second.hasAttribute(Attribute::None) &&
527 "Pointless attribute!");
531 // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
533 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
534 for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
535 E = Attrs.end(); I != E; ) {
536 unsigned Index = I->first;
537 SmallVector<Attribute, 4> AttrVec;
538 while (I != E && I->first == Index) {
539 AttrVec.push_back(I->second);
543 AttrPairVec.push_back(std::make_pair(Index,
544 AttributeSetNode::get(C, AttrVec)));
547 return getImpl(C, AttrPairVec);
550 AttributeSet AttributeSet::get(LLVMContext &C,
551 ArrayRef<std::pair<unsigned,
552 AttributeSetNode*> > Attrs) {
553 // If there are no attributes then return a null AttributesList pointer.
555 return AttributeSet();
557 return getImpl(C, Attrs);
560 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx, AttrBuilder &B) {
561 if (!B.hasAttributes())
562 return AttributeSet();
564 // Add target-independent attributes.
565 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
566 for (AttrBuilder::iterator I = B.begin(), E = B.end(); I != E; ++I) {
567 Attribute::AttrKind Kind = *I;
568 if (Kind == Attribute::Alignment)
569 Attrs.push_back(std::make_pair(Idx, Attribute::
570 getWithAlignment(C, B.getAlignment())));
571 else if (Kind == Attribute::StackAlignment)
572 Attrs.push_back(std::make_pair(Idx, Attribute::
573 getWithStackAlignment(C, B.getStackAlignment())));
575 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, Kind)));
578 // Add target-dependent (string) attributes.
579 for (AttrBuilder::td_iterator I = B.td_begin(), E = B.td_end();
581 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, I->first,I->second)));
583 return get(C, Attrs);
586 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx,
587 ArrayRef<Attribute::AttrKind> Kind) {
588 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
589 for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
590 E = Kind.end(); I != E; ++I)
591 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, *I)));
592 return get(C, Attrs);
595 AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
596 if (Attrs.empty()) return AttributeSet();
598 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
599 for (unsigned I = 0, E = Attrs.size(); I != E; ++I) {
600 AttributeSet AS = Attrs[I];
601 if (!AS.pImpl) continue;
602 AttrNodeVec.append(AS.pImpl->AttrNodes.begin(), AS.pImpl->AttrNodes.end());
605 return getImpl(C, AttrNodeVec);
608 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Idx,
609 Attribute::AttrKind Attr) const {
610 return addAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
613 AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Idx,
614 AttributeSet Attrs) const {
615 if (!pImpl) return Attrs;
616 if (!Attrs.pImpl) return *this;
619 // FIXME it is not obvious how this should work for alignment. For now, say
620 // we can't change a known alignment.
621 unsigned OldAlign = getParamAlignment(Idx);
622 unsigned NewAlign = Attrs.getParamAlignment(Idx);
623 assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
624 "Attempt to change alignment!");
627 // Add the attribute slots before the one we're trying to add.
628 SmallVector<AttributeSet, 4> AttrSet;
629 uint64_t NumAttrs = pImpl->getNumAttributes();
631 uint64_t LastIndex = 0;
632 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
633 if (getSlotIndex(I) >= Idx) {
634 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
638 AttrSet.push_back(getSlotAttributes(I));
641 // Now add the attribute into the correct slot. There may already be an
642 // AttributeSet there.
643 AttrBuilder B(AS, Idx);
645 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
646 if (Attrs.getSlotIndex(I) == Idx) {
647 for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
648 IE = Attrs.pImpl->end(I); II != IE; ++II)
653 AttrSet.push_back(AttributeSet::get(C, Idx, B));
655 // Add the remaining attribute slots.
656 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
657 AttrSet.push_back(getSlotAttributes(I));
659 return get(C, AttrSet);
662 AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Idx,
663 Attribute::AttrKind Attr) const {
664 return removeAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
667 AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Idx,
668 AttributeSet Attrs) const {
669 if (!pImpl) return AttributeSet();
670 if (!Attrs.pImpl) return *this;
673 // FIXME it is not obvious how this should work for alignment.
674 // For now, say we can't pass in alignment, which no current use does.
675 assert(!Attrs.hasAttribute(Idx, Attribute::Alignment) &&
676 "Attempt to change alignment!");
679 // Add the attribute slots before the one we're trying to add.
680 SmallVector<AttributeSet, 4> AttrSet;
681 uint64_t NumAttrs = pImpl->getNumAttributes();
683 uint64_t LastIndex = 0;
684 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
685 if (getSlotIndex(I) >= Idx) {
686 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
690 AttrSet.push_back(getSlotAttributes(I));
693 // Now remove the attribute from the correct slot. There may already be an
694 // AttributeSet there.
695 AttrBuilder B(AS, Idx);
697 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
698 if (Attrs.getSlotIndex(I) == Idx) {
699 B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Idx);
703 AttrSet.push_back(AttributeSet::get(C, Idx, B));
705 // Add the remaining attribute slots.
706 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
707 AttrSet.push_back(getSlotAttributes(I));
709 return get(C, AttrSet);
712 //===----------------------------------------------------------------------===//
713 // AttributeSet Accessor Methods
714 //===----------------------------------------------------------------------===//
716 LLVMContext &AttributeSet::getContext() const {
717 return pImpl->getContext();
720 AttributeSet AttributeSet::getParamAttributes(unsigned Idx) const {
721 return pImpl && hasAttributes(Idx) ?
722 AttributeSet::get(pImpl->getContext(),
723 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
724 std::make_pair(Idx, getAttributes(Idx)))) :
728 AttributeSet AttributeSet::getRetAttributes() const {
729 return pImpl && hasAttributes(ReturnIndex) ?
730 AttributeSet::get(pImpl->getContext(),
731 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
732 std::make_pair(ReturnIndex,
733 getAttributes(ReturnIndex)))) :
737 AttributeSet AttributeSet::getFnAttributes() const {
738 return pImpl && hasAttributes(FunctionIndex) ?
739 AttributeSet::get(pImpl->getContext(),
740 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
741 std::make_pair(FunctionIndex,
742 getAttributes(FunctionIndex)))) :
746 bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
747 AttributeSetNode *ASN = getAttributes(Index);
748 return ASN ? ASN->hasAttribute(Kind) : false;
751 bool AttributeSet::hasAttributes(unsigned Index) const {
752 AttributeSetNode *ASN = getAttributes(Index);
753 return ASN ? ASN->hasAttributes() : false;
756 /// \brief Return true if the specified attribute is set for at least one
757 /// parameter or for the return value.
758 bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
759 if (pImpl == 0) return false;
761 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
762 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
763 IE = pImpl->end(I); II != IE; ++II)
764 if (II->hasAttribute(Attr))
770 unsigned AttributeSet::getParamAlignment(unsigned Index) const {
771 AttributeSetNode *ASN = getAttributes(Index);
772 return ASN ? ASN->getAlignment() : 0;
775 unsigned AttributeSet::getStackAlignment(unsigned Index) const {
776 AttributeSetNode *ASN = getAttributes(Index);
777 return ASN ? ASN->getStackAlignment() : 0;
780 std::string AttributeSet::getAsString(unsigned Index) const {
781 AttributeSetNode *ASN = getAttributes(Index);
782 return ASN ? ASN->getAsString() : std::string("");
785 /// \brief The attributes for the specified index are returned.
786 AttributeSetNode *AttributeSet::getAttributes(unsigned Idx) const {
787 if (!pImpl) return 0;
789 // Loop through to find the attribute node we want.
790 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
791 if (pImpl->getSlotIndex(I) == Idx)
792 return pImpl->getSlotNode(I);
797 AttributeSet::iterator AttributeSet::begin(unsigned Idx) const {
799 return ArrayRef<Attribute>().begin();
800 return pImpl->begin(Idx);
803 AttributeSet::iterator AttributeSet::end(unsigned Idx) const {
805 return ArrayRef<Attribute>().end();
806 return pImpl->end(Idx);
809 //===----------------------------------------------------------------------===//
810 // AttributeSet Introspection Methods
811 //===----------------------------------------------------------------------===//
813 /// \brief Return the number of slots used in this attribute list. This is the
814 /// number of arguments that have an attribute set on them (including the
815 /// function itself).
816 unsigned AttributeSet::getNumSlots() const {
817 return pImpl ? pImpl->getNumAttributes() : 0;
820 uint64_t AttributeSet::getSlotIndex(unsigned Slot) const {
821 assert(pImpl && Slot < pImpl->getNumAttributes() &&
822 "Slot # out of range!");
823 return pImpl->getSlotIndex(Slot);
826 AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
827 assert(pImpl && Slot < pImpl->getNumAttributes() &&
828 "Slot # out of range!");
829 return pImpl->getSlotAttributes(Slot);
832 uint64_t AttributeSet::Raw(unsigned Index) const {
833 // FIXME: Remove this.
834 return pImpl ? pImpl->Raw(Index) : 0;
837 void AttributeSet::dump() const {
840 for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
841 uint64_t Index = getSlotIndex(i);
847 dbgs() << " => " << getAsString(Index) << " }\n";
853 //===----------------------------------------------------------------------===//
854 // AttrBuilder Method Implementations
855 //===----------------------------------------------------------------------===//
857 AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Idx)
858 : Alignment(0), StackAlignment(0) {
859 AttributeSetImpl *pImpl = AS.pImpl;
862 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
863 if (pImpl->getSlotIndex(I) != Idx) continue;
865 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
866 IE = pImpl->end(I); II != IE; ++II)
873 void AttrBuilder::clear() {
875 Alignment = StackAlignment = 0;
878 AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
879 assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
880 "Adding alignment attribute without adding alignment value!");
885 AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
886 if (Attr.isStringAttribute()) {
887 addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
891 Attribute::AttrKind Kind = Attr.getKindAsEnum();
894 if (Kind == Attribute::Alignment)
895 Alignment = Attr.getAlignment();
896 else if (Kind == Attribute::StackAlignment)
897 StackAlignment = Attr.getStackAlignment();
901 AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
902 TargetDepAttrs[A] = V;
906 AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
909 if (Val == Attribute::Alignment)
911 else if (Val == Attribute::StackAlignment)
917 AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
919 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
920 if (A.getSlotIndex(I) == Index) {
925 assert(Idx != ~0U && "Couldn't find index in AttributeSet!");
927 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx); I != E; ++I) {
928 // FIXME: Support string attributes.
929 Attribute::AttrKind Kind = I->getKindAsEnum();
932 if (Kind == Attribute::Alignment)
934 else if (Kind == Attribute::StackAlignment)
941 AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
942 std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
943 if (I != TargetDepAttrs.end())
944 TargetDepAttrs.erase(I);
948 AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
949 if (Align == 0) return *this;
951 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
952 assert(Align <= 0x40000000 && "Alignment too large.");
954 Attrs.insert(Attribute::Alignment);
959 AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
960 // Default alignment, allow the target to define how to align it.
961 if (Align == 0) return *this;
963 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
964 assert(Align <= 0x100 && "Alignment too large.");
966 Attrs.insert(Attribute::StackAlignment);
967 StackAlignment = Align;
971 AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
972 // FIXME: What if both have alignments, but they don't match?!
974 Alignment = B.Alignment;
977 StackAlignment = B.StackAlignment;
979 Attrs.insert(B.Attrs.begin(), B.Attrs.end());
981 for (td_const_iterator I = B.TargetDepAttrs.begin(),
982 E = B.TargetDepAttrs.end(); I != E; ++I)
983 TargetDepAttrs[I->first] = I->second;
988 bool AttrBuilder::contains(Attribute::AttrKind A) const {
989 return Attrs.count(A);
992 bool AttrBuilder::contains(StringRef A) const {
993 return TargetDepAttrs.find(A) != TargetDepAttrs.end();
996 bool AttrBuilder::hasAttributes() const {
997 return !Attrs.empty() || !TargetDepAttrs.empty();
1000 bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
1002 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
1003 if (A.getSlotIndex(I) == Index) {
1008 assert(Idx != ~0U && "Couldn't find the index!");
1010 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx);
1012 // FIXME: Support string attributes.
1013 if (Attrs.count(I->getKindAsEnum()))
1019 bool AttrBuilder::hasAlignmentAttr() const {
1020 return Alignment != 0;
1023 bool AttrBuilder::operator==(const AttrBuilder &B) {
1024 for (DenseSet<Attribute::AttrKind>::iterator I = Attrs.begin(),
1025 E = Attrs.end(); I != E; ++I)
1026 if (!B.Attrs.count(*I))
1029 for (td_const_iterator I = TargetDepAttrs.begin(),
1030 E = TargetDepAttrs.end(); I != E; ++I)
1031 if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
1034 return Alignment == B.Alignment && StackAlignment == B.StackAlignment;
1037 AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
1038 // FIXME: Remove this in 4.0.
1039 if (!Val) return *this;
1041 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1042 I = Attribute::AttrKind(I + 1)) {
1043 if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
1046 if (I == Attribute::Alignment)
1047 Alignment = 1ULL << ((A >> 16) - 1);
1048 else if (I == Attribute::StackAlignment)
1049 StackAlignment = 1ULL << ((A >> 26)-1);
1056 //===----------------------------------------------------------------------===//
1057 // AttributeFuncs Function Defintions
1058 //===----------------------------------------------------------------------===//
1060 /// \brief Which attributes cannot be applied to a type.
1061 AttributeSet AttributeFuncs::typeIncompatible(Type *Ty, uint64_t Index) {
1062 AttrBuilder Incompatible;
1064 if (!Ty->isIntegerTy())
1065 // Attribute that only apply to integers.
1066 Incompatible.addAttribute(Attribute::SExt)
1067 .addAttribute(Attribute::ZExt);
1069 if (!Ty->isPointerTy())
1070 // Attribute that only apply to pointers.
1071 Incompatible.addAttribute(Attribute::ByVal)
1072 .addAttribute(Attribute::Nest)
1073 .addAttribute(Attribute::NoAlias)
1074 .addAttribute(Attribute::NoCapture)
1075 .addAttribute(Attribute::StructRet);
1077 return AttributeSet::get(Ty->getContext(), Index, Incompatible);