1 //===-- Attributes.cpp - Implement AttributesList -------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // \file
11 // \brief This file implements the Attribute, AttributeImpl, AttrBuilder,
12 // AttributeSetImpl, and AttributeSet classes.
13 //
14 //===----------------------------------------------------------------------===//
15
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"
26 #include <algorithm>
27 using namespace llvm;
28
29 //===----------------------------------------------------------------------===//
30 // Attribute Construction Methods
31 //===----------------------------------------------------------------------===//
32
get(LLVMContext & Context,Attribute::AttrKind Kind,uint64_t Val)33 Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
34 uint64_t Val) {
35 LLVMContextImpl *pImpl = Context.pImpl;
36 FoldingSetNodeID ID;
37 ID.AddInteger(Kind);
38 if (Val) ID.AddInteger(Val);
39
40 void *InsertPoint;
41 AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
42
43 if (!PA) {
44 // If we didn't find any existing attributes of the same shape then create a
45 // new one and insert it.
46 PA = !Val ?
47 new AttributeImpl(Context, Kind) :
48 new AttributeImpl(Context, Kind, Val);
49 pImpl->AttrsSet.InsertNode(PA, InsertPoint);
50 }
51
52 // Return the Attribute that we found or created.
53 return Attribute(PA);
54 }
55
get(LLVMContext & Context,StringRef Kind,StringRef Val)56 Attribute Attribute::get(LLVMContext &Context, StringRef Kind, StringRef Val) {
57 LLVMContextImpl *pImpl = Context.pImpl;
58 FoldingSetNodeID ID;
59 ID.AddString(Kind);
60 if (!Val.empty()) ID.AddString(Val);
61
62 void *InsertPoint;
63 AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
64
65 if (!PA) {
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);
70 }
71
72 // Return the Attribute that we found or created.
73 return Attribute(PA);
74 }
75
getWithAlignment(LLVMContext & Context,uint64_t Align)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);
80 }
81
getWithStackAlignment(LLVMContext & Context,uint64_t Align)82 Attribute Attribute::getWithStackAlignment(LLVMContext &Context,
83 uint64_t Align) {
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);
87 }
88
89 //===----------------------------------------------------------------------===//
90 // Attribute Accessor Methods
91 //===----------------------------------------------------------------------===//
92
isEnumAttribute() const93 bool Attribute::isEnumAttribute() const {
94 return pImpl && pImpl->isEnumAttribute();
95 }
96
isAlignAttribute() const97 bool Attribute::isAlignAttribute() const {
98 return pImpl && pImpl->isAlignAttribute();
99 }
100
isStringAttribute() const101 bool Attribute::isStringAttribute() const {
102 return pImpl && pImpl->isStringAttribute();
103 }
104
getKindAsEnum() const105 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;
109 }
110
getValueAsInt() const111 uint64_t Attribute::getValueAsInt() const {
112 assert(isAlignAttribute() &&
113 "Expected the attribute to be an alignment attribute!");
114 return pImpl ? pImpl->getValueAsInt() : 0;
115 }
116
getKindAsString() const117 StringRef Attribute::getKindAsString() const {
118 assert(isStringAttribute() &&
119 "Invalid attribute type to get the kind as a string!");
120 return pImpl ? pImpl->getKindAsString() : StringRef();
121 }
122
getValueAsString() const123 StringRef Attribute::getValueAsString() const {
124 assert(isStringAttribute() &&
125 "Invalid attribute type to get the value as a string!");
126 return pImpl ? pImpl->getValueAsString() : StringRef();
127 }
128
hasAttribute(AttrKind Kind) const129 bool Attribute::hasAttribute(AttrKind Kind) const {
130 return (pImpl && pImpl->hasAttribute(Kind)) || (!pImpl && Kind == None);
131 }
132
hasAttribute(StringRef Kind) const133 bool Attribute::hasAttribute(StringRef Kind) const {
134 if (!isStringAttribute()) return false;
135 return pImpl && pImpl->hasAttribute(Kind);
136 }
137
138 /// This returns the alignment field of an attribute as a byte alignment value.
getAlignment() const139 unsigned Attribute::getAlignment() const {
140 assert(hasAttribute(Attribute::Alignment) &&
141 "Trying to get alignment from non-alignment attribute!");
142 return pImpl->getValueAsInt();
143 }
144
145 /// This returns the stack alignment field of an attribute as a byte alignment
146 /// value.
getStackAlignment() const147 unsigned Attribute::getStackAlignment() const {
148 assert(hasAttribute(Attribute::StackAlignment) &&
149 "Trying to get alignment from non-alignment attribute!");
150 return pImpl->getValueAsInt();
151 }
152
getAsString(bool InAttrGrp) const153 std::string Attribute::getAsString(bool InAttrGrp) const {
154 if (!pImpl) return "";
155
156 if (hasAttribute(Attribute::SanitizeAddress))
157 return "sanitize_address";
158 if (hasAttribute(Attribute::AlwaysInline))
159 return "alwaysinline";
160 if (hasAttribute(Attribute::ByVal))
161 return "byval";
162 if (hasAttribute(Attribute::InlineHint))
163 return "inlinehint";
164 if (hasAttribute(Attribute::InReg))
165 return "inreg";
166 if (hasAttribute(Attribute::MinSize))
167 return "minsize";
168 if (hasAttribute(Attribute::Naked))
169 return "naked";
170 if (hasAttribute(Attribute::Nest))
171 return "nest";
172 if (hasAttribute(Attribute::NoAlias))
173 return "noalias";
174 if (hasAttribute(Attribute::NoBuiltin))
175 return "nobuiltin";
176 if (hasAttribute(Attribute::NoCapture))
177 return "nocapture";
178 if (hasAttribute(Attribute::NoDuplicate))
179 return "noduplicate";
180 if (hasAttribute(Attribute::NoImplicitFloat))
181 return "noimplicitfloat";
182 if (hasAttribute(Attribute::NoInline))
183 return "noinline";
184 if (hasAttribute(Attribute::NonLazyBind))
185 return "nonlazybind";
186 if (hasAttribute(Attribute::NoRedZone))
187 return "noredzone";
188 if (hasAttribute(Attribute::NoReturn))
189 return "noreturn";
190 if (hasAttribute(Attribute::NoUnwind))
191 return "nounwind";
192 if (hasAttribute(Attribute::OptimizeForSize))
193 return "optsize";
194 if (hasAttribute(Attribute::ReadNone))
195 return "readnone";
196 if (hasAttribute(Attribute::ReadOnly))
197 return "readonly";
198 if (hasAttribute(Attribute::ReturnsTwice))
199 return "returns_twice";
200 if (hasAttribute(Attribute::SExt))
201 return "signext";
202 if (hasAttribute(Attribute::StackProtect))
203 return "ssp";
204 if (hasAttribute(Attribute::StackProtectReq))
205 return "sspreq";
206 if (hasAttribute(Attribute::StackProtectStrong))
207 return "sspstrong";
208 if (hasAttribute(Attribute::StructRet))
209 return "sret";
210 if (hasAttribute(Attribute::SanitizeThread))
211 return "sanitize_thread";
212 if (hasAttribute(Attribute::SanitizeMemory))
213 return "sanitize_memory";
214 if (hasAttribute(Attribute::UWTable))
215 return "uwtable";
216 if (hasAttribute(Attribute::ZExt))
217 return "zeroext";
218
219 // FIXME: These should be output like this:
220 //
221 // align=4
222 // alignstack=8
223 //
224 if (hasAttribute(Attribute::Alignment)) {
225 std::string Result;
226 Result += "align";
227 Result += (InAttrGrp) ? "=" : " ";
228 Result += utostr(getValueAsInt());
229 return Result;
230 }
231
232 if (hasAttribute(Attribute::StackAlignment)) {
233 std::string Result;
234 Result += "alignstack";
235 if (InAttrGrp) {
236 Result += "=";
237 Result += utostr(getValueAsInt());
238 } else {
239 Result += "(";
240 Result += utostr(getValueAsInt());
241 Result += ")";
242 }
243 return Result;
244 }
245
246 // Convert target-dependent attributes to strings of the form:
247 //
248 // "kind"
249 // "kind" = "value"
250 //
251 if (isStringAttribute()) {
252 std::string Result;
253 Result += '\"' + getKindAsString().str() + '"';
254
255 StringRef Val = pImpl->getValueAsString();
256 if (Val.empty()) return Result;
257
258 Result += "=\"" + Val.str() + '"';
259 return Result;
260 }
261
262 llvm_unreachable("Unknown attribute");
263 }
264
operator <(Attribute A) const265 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;
270 }
271
272 //===----------------------------------------------------------------------===//
273 // AttributeImpl Definition
274 //===----------------------------------------------------------------------===//
275
AttributeImpl(LLVMContext & C,Attribute::AttrKind Kind)276 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind)
277 : Context(C), Entry(new EnumAttributeEntry(Kind)) {}
278
AttributeImpl(LLVMContext & C,Attribute::AttrKind Kind,unsigned Align)279 AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind,
280 unsigned Align)
281 : Context(C) {
282 assert((Kind == Attribute::Alignment || Kind == Attribute::StackAlignment) &&
283 "Wrong kind for alignment attribute!");
284 Entry = new AlignAttributeEntry(Kind, Align);
285 }
286
AttributeImpl(LLVMContext & C,StringRef Kind,StringRef Val)287 AttributeImpl::AttributeImpl(LLVMContext &C, StringRef Kind, StringRef Val)
288 : Context(C), Entry(new StringAttributeEntry(Kind, Val)) {}
289
~AttributeImpl()290 AttributeImpl::~AttributeImpl() {
291 delete Entry;
292 }
293
isEnumAttribute() const294 bool AttributeImpl::isEnumAttribute() const {
295 return isa<EnumAttributeEntry>(Entry);
296 }
297
isAlignAttribute() const298 bool AttributeImpl::isAlignAttribute() const {
299 return isa<AlignAttributeEntry>(Entry);
300 }
301
isStringAttribute() const302 bool AttributeImpl::isStringAttribute() const {
303 return isa<StringAttributeEntry>(Entry);
304 }
305
hasAttribute(Attribute::AttrKind A) const306 bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
307 if (isStringAttribute()) return false;
308 return getKindAsEnum() == A;
309 }
310
hasAttribute(StringRef Kind) const311 bool AttributeImpl::hasAttribute(StringRef Kind) const {
312 if (!isStringAttribute()) return false;
313 return getKindAsString() == Kind;
314 }
315
getKindAsEnum() const316 Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
317 if (EnumAttributeEntry *E = dyn_cast<EnumAttributeEntry>(Entry))
318 return E->getEnumKind();
319 return cast<AlignAttributeEntry>(Entry)->getEnumKind();
320 }
321
getValueAsInt() const322 uint64_t AttributeImpl::getValueAsInt() const {
323 return cast<AlignAttributeEntry>(Entry)->getAlignment();
324 }
325
getKindAsString() const326 StringRef AttributeImpl::getKindAsString() const {
327 return cast<StringAttributeEntry>(Entry)->getStringKind();
328 }
329
getValueAsString() const330 StringRef AttributeImpl::getValueAsString() const {
331 return cast<StringAttributeEntry>(Entry)->getStringValue();
332 }
333
operator <(const AttributeImpl & AI) const334 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;
341 }
342
343 if (isAlignAttribute()) {
344 if (AI.isEnumAttribute()) return false;
345 if (AI.isAlignAttribute()) return getValueAsInt() < AI.getValueAsInt();
346 if (AI.isStringAttribute()) return true;
347 }
348
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();
354 }
355
getAttrMask(Attribute::AttrKind Val)356 uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
357 // FIXME: Remove this.
358 switch (Val) {
359 case Attribute::EndAttrKinds:
360 llvm_unreachable("Synthetic enumerators which should never get here");
361
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;
396 }
397 llvm_unreachable("Unsupported attribute type");
398 }
399
400 //===----------------------------------------------------------------------===//
401 // AttributeSetNode Definition
402 //===----------------------------------------------------------------------===//
403
get(LLVMContext & C,ArrayRef<Attribute> Attrs)404 AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
405 ArrayRef<Attribute> Attrs) {
406 if (Attrs.empty())
407 return 0;
408
409 // Otherwise, build a key to look up the existing attributes.
410 LLVMContextImpl *pImpl = C.pImpl;
411 FoldingSetNodeID ID;
412
413 SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
414 array_pod_sort(SortedAttrs.begin(), SortedAttrs.end());
415
416 for (SmallVectorImpl<Attribute>::iterator I = SortedAttrs.begin(),
417 E = SortedAttrs.end(); I != E; ++I)
418 I->Profile(ID);
419
420 void *InsertPoint;
421 AttributeSetNode *PA =
422 pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
423
424 // If we didn't find any existing attributes of the same shape then create a
425 // new one and insert it.
426 if (!PA) {
427 PA = new AttributeSetNode(SortedAttrs);
428 pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
429 }
430
431 // Return the AttributesListNode that we found or created.
432 return PA;
433 }
434
hasAttribute(Attribute::AttrKind Kind) const435 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))
439 return true;
440 return false;
441 }
442
hasAttribute(StringRef Kind) const443 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))
447 return true;
448 return false;
449 }
450
getAttribute(Attribute::AttrKind Kind) const451 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))
455 return *I;
456 return Attribute();
457 }
458
getAttribute(StringRef Kind) const459 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))
463 return *I;
464 return Attribute();
465 }
466
getAlignment() const467 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();
472 return 0;
473 }
474
getStackAlignment() const475 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();
480 return 0;
481 }
482
getAsString(bool InAttrGrp) const483 std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
484 std::string Str = "";
485 for (SmallVectorImpl<Attribute>::const_iterator I = AttrList.begin(),
486 E = AttrList.end(); I != E; ) {
487 Str += I->getAsString(InAttrGrp);
488 if (++I != E) Str += " ";
489 }
490 return Str;
491 }
492
493 //===----------------------------------------------------------------------===//
494 // AttributeSetImpl Definition
495 //===----------------------------------------------------------------------===//
496
Raw(uint64_t Index) const497 uint64_t AttributeSetImpl::Raw(uint64_t Index) const {
498 for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
499 if (getSlotIndex(I) != Index) continue;
500 const AttributeSetNode *ASN = AttrNodes[I].second;
501 uint64_t Mask = 0;
502
503 for (AttributeSetNode::const_iterator II = ASN->begin(),
504 IE = ASN->end(); II != IE; ++II) {
505 Attribute Attr = *II;
506
507 // This cannot handle string attributes.
508 if (Attr.isStringAttribute()) continue;
509
510 Attribute::AttrKind Kind = Attr.getKindAsEnum();
511
512 if (Kind == Attribute::Alignment)
513 Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
514 else if (Kind == Attribute::StackAlignment)
515 Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
516 else
517 Mask |= AttributeImpl::getAttrMask(Kind);
518 }
519
520 return Mask;
521 }
522
523 return 0;
524 }
525
526 //===----------------------------------------------------------------------===//
527 // AttributeSet Construction and Mutation Methods
528 //===----------------------------------------------------------------------===//
529
530 AttributeSet
getImpl(LLVMContext & C,ArrayRef<std::pair<unsigned,AttributeSetNode * >> Attrs)531 AttributeSet::getImpl(LLVMContext &C,
532 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Attrs) {
533 LLVMContextImpl *pImpl = C.pImpl;
534 FoldingSetNodeID ID;
535 AttributeSetImpl::Profile(ID, Attrs);
536
537 void *InsertPoint;
538 AttributeSetImpl *PA = pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
539
540 // If we didn't find any existing attributes of the same shape then
541 // create a new one and insert it.
542 if (!PA) {
543 PA = new AttributeSetImpl(C, Attrs);
544 pImpl->AttrsLists.InsertNode(PA, InsertPoint);
545 }
546
547 // Return the AttributesList that we found or created.
548 return AttributeSet(PA);
549 }
550
get(LLVMContext & C,ArrayRef<std::pair<unsigned,Attribute>> Attrs)551 AttributeSet AttributeSet::get(LLVMContext &C,
552 ArrayRef<std::pair<unsigned, Attribute> > Attrs){
553 // If there are no attributes then return a null AttributesList pointer.
554 if (Attrs.empty())
555 return AttributeSet();
556
557 #ifndef NDEBUG
558 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
559 assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
560 "Misordered Attributes list!");
561 assert(!Attrs[i].second.hasAttribute(Attribute::None) &&
562 "Pointless attribute!");
563 }
564 #endif
565
566 // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
567 // list.
568 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
569 for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
570 E = Attrs.end(); I != E; ) {
571 unsigned Index = I->first;
572 SmallVector<Attribute, 4> AttrVec;
573 while (I != E && I->first == Index) {
574 AttrVec.push_back(I->second);
575 ++I;
576 }
577
578 AttrPairVec.push_back(std::make_pair(Index,
579 AttributeSetNode::get(C, AttrVec)));
580 }
581
582 return getImpl(C, AttrPairVec);
583 }
584
get(LLVMContext & C,ArrayRef<std::pair<unsigned,AttributeSetNode * >> Attrs)585 AttributeSet AttributeSet::get(LLVMContext &C,
586 ArrayRef<std::pair<unsigned,
587 AttributeSetNode*> > Attrs) {
588 // If there are no attributes then return a null AttributesList pointer.
589 if (Attrs.empty())
590 return AttributeSet();
591
592 return getImpl(C, Attrs);
593 }
594
get(LLVMContext & C,unsigned Idx,AttrBuilder & B)595 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx, AttrBuilder &B) {
596 if (!B.hasAttributes())
597 return AttributeSet();
598
599 // Add target-independent attributes.
600 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
601 for (Attribute::AttrKind Kind = Attribute::None;
602 Kind != Attribute::EndAttrKinds; Kind = Attribute::AttrKind(Kind + 1)) {
603 if (!B.contains(Kind))
604 continue;
605
606 if (Kind == Attribute::Alignment)
607 Attrs.push_back(std::make_pair(Idx, Attribute::
608 getWithAlignment(C, B.getAlignment())));
609 else if (Kind == Attribute::StackAlignment)
610 Attrs.push_back(std::make_pair(Idx, Attribute::
611 getWithStackAlignment(C, B.getStackAlignment())));
612 else
613 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, Kind)));
614 }
615
616 // Add target-dependent (string) attributes.
617 for (AttrBuilder::td_iterator I = B.td_begin(), E = B.td_end();
618 I != E; ++I)
619 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, I->first,I->second)));
620
621 return get(C, Attrs);
622 }
623
get(LLVMContext & C,unsigned Idx,ArrayRef<Attribute::AttrKind> Kind)624 AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx,
625 ArrayRef<Attribute::AttrKind> Kind) {
626 SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
627 for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
628 E = Kind.end(); I != E; ++I)
629 Attrs.push_back(std::make_pair(Idx, Attribute::get(C, *I)));
630 return get(C, Attrs);
631 }
632
get(LLVMContext & C,ArrayRef<AttributeSet> Attrs)633 AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
634 if (Attrs.empty()) return AttributeSet();
635
636 SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
637 for (unsigned I = 0, E = Attrs.size(); I != E; ++I) {
638 AttributeSet AS = Attrs[I];
639 if (!AS.pImpl) continue;
640 AttrNodeVec.append(AS.pImpl->AttrNodes.begin(), AS.pImpl->AttrNodes.end());
641 }
642
643 return getImpl(C, AttrNodeVec);
644 }
645
addAttribute(LLVMContext & C,unsigned Idx,Attribute::AttrKind Attr) const646 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Idx,
647 Attribute::AttrKind Attr) const {
648 if (hasAttribute(Idx, Attr)) return *this;
649 return addAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
650 }
651
addAttribute(LLVMContext & C,unsigned Idx,StringRef Kind) const652 AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Idx,
653 StringRef Kind) const {
654 llvm::AttrBuilder B;
655 B.addAttribute(Kind);
656 return addAttributes(C, Idx, AttributeSet::get(C, Idx, B));
657 }
658
addAttributes(LLVMContext & C,unsigned Idx,AttributeSet Attrs) const659 AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Idx,
660 AttributeSet Attrs) const {
661 if (!pImpl) return Attrs;
662 if (!Attrs.pImpl) return *this;
663
664 #ifndef NDEBUG
665 // FIXME it is not obvious how this should work for alignment. For now, say
666 // we can't change a known alignment.
667 unsigned OldAlign = getParamAlignment(Idx);
668 unsigned NewAlign = Attrs.getParamAlignment(Idx);
669 assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
670 "Attempt to change alignment!");
671 #endif
672
673 // Add the attribute slots before the one we're trying to add.
674 SmallVector<AttributeSet, 4> AttrSet;
675 uint64_t NumAttrs = pImpl->getNumAttributes();
676 AttributeSet AS;
677 uint64_t LastIndex = 0;
678 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
679 if (getSlotIndex(I) >= Idx) {
680 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
681 break;
682 }
683 LastIndex = I + 1;
684 AttrSet.push_back(getSlotAttributes(I));
685 }
686
687 // Now add the attribute into the correct slot. There may already be an
688 // AttributeSet there.
689 AttrBuilder B(AS, Idx);
690
691 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
692 if (Attrs.getSlotIndex(I) == Idx) {
693 for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
694 IE = Attrs.pImpl->end(I); II != IE; ++II)
695 B.addAttribute(*II);
696 break;
697 }
698
699 AttrSet.push_back(AttributeSet::get(C, Idx, B));
700
701 // Add the remaining attribute slots.
702 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
703 AttrSet.push_back(getSlotAttributes(I));
704
705 return get(C, AttrSet);
706 }
707
removeAttribute(LLVMContext & C,unsigned Idx,Attribute::AttrKind Attr) const708 AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Idx,
709 Attribute::AttrKind Attr) const {
710 if (!hasAttribute(Idx, Attr)) return *this;
711 return removeAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
712 }
713
removeAttributes(LLVMContext & C,unsigned Idx,AttributeSet Attrs) const714 AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Idx,
715 AttributeSet Attrs) const {
716 if (!pImpl) return AttributeSet();
717 if (!Attrs.pImpl) return *this;
718
719 #ifndef NDEBUG
720 // FIXME it is not obvious how this should work for alignment.
721 // For now, say we can't pass in alignment, which no current use does.
722 assert(!Attrs.hasAttribute(Idx, Attribute::Alignment) &&
723 "Attempt to change alignment!");
724 #endif
725
726 // Add the attribute slots before the one we're trying to add.
727 SmallVector<AttributeSet, 4> AttrSet;
728 uint64_t NumAttrs = pImpl->getNumAttributes();
729 AttributeSet AS;
730 uint64_t LastIndex = 0;
731 for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
732 if (getSlotIndex(I) >= Idx) {
733 if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
734 break;
735 }
736 LastIndex = I + 1;
737 AttrSet.push_back(getSlotAttributes(I));
738 }
739
740 // Now remove the attribute from the correct slot. There may already be an
741 // AttributeSet there.
742 AttrBuilder B(AS, Idx);
743
744 for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
745 if (Attrs.getSlotIndex(I) == Idx) {
746 B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Idx);
747 break;
748 }
749
750 AttrSet.push_back(AttributeSet::get(C, Idx, B));
751
752 // Add the remaining attribute slots.
753 for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
754 AttrSet.push_back(getSlotAttributes(I));
755
756 return get(C, AttrSet);
757 }
758
759 //===----------------------------------------------------------------------===//
760 // AttributeSet Accessor Methods
761 //===----------------------------------------------------------------------===//
762
getContext() const763 LLVMContext &AttributeSet::getContext() const {
764 return pImpl->getContext();
765 }
766
getParamAttributes(unsigned Idx) const767 AttributeSet AttributeSet::getParamAttributes(unsigned Idx) const {
768 return pImpl && hasAttributes(Idx) ?
769 AttributeSet::get(pImpl->getContext(),
770 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
771 std::make_pair(Idx, getAttributes(Idx)))) :
772 AttributeSet();
773 }
774
getRetAttributes() const775 AttributeSet AttributeSet::getRetAttributes() const {
776 return pImpl && hasAttributes(ReturnIndex) ?
777 AttributeSet::get(pImpl->getContext(),
778 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
779 std::make_pair(ReturnIndex,
780 getAttributes(ReturnIndex)))) :
781 AttributeSet();
782 }
783
getFnAttributes() const784 AttributeSet AttributeSet::getFnAttributes() const {
785 return pImpl && hasAttributes(FunctionIndex) ?
786 AttributeSet::get(pImpl->getContext(),
787 ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
788 std::make_pair(FunctionIndex,
789 getAttributes(FunctionIndex)))) :
790 AttributeSet();
791 }
792
hasAttribute(unsigned Index,Attribute::AttrKind Kind) const793 bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
794 AttributeSetNode *ASN = getAttributes(Index);
795 return ASN ? ASN->hasAttribute(Kind) : false;
796 }
797
hasAttribute(unsigned Index,StringRef Kind) const798 bool AttributeSet::hasAttribute(unsigned Index, StringRef Kind) const {
799 AttributeSetNode *ASN = getAttributes(Index);
800 return ASN ? ASN->hasAttribute(Kind) : false;
801 }
802
hasAttributes(unsigned Index) const803 bool AttributeSet::hasAttributes(unsigned Index) const {
804 AttributeSetNode *ASN = getAttributes(Index);
805 return ASN ? ASN->hasAttributes() : false;
806 }
807
808 /// \brief Return true if the specified attribute is set for at least one
809 /// parameter or for the return value.
hasAttrSomewhere(Attribute::AttrKind Attr) const810 bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
811 if (pImpl == 0) return false;
812
813 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
814 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
815 IE = pImpl->end(I); II != IE; ++II)
816 if (II->hasAttribute(Attr))
817 return true;
818
819 return false;
820 }
821
getAttribute(unsigned Index,Attribute::AttrKind Kind) const822 Attribute AttributeSet::getAttribute(unsigned Index,
823 Attribute::AttrKind Kind) const {
824 AttributeSetNode *ASN = getAttributes(Index);
825 return ASN ? ASN->getAttribute(Kind) : Attribute();
826 }
827
getAttribute(unsigned Index,StringRef Kind) const828 Attribute AttributeSet::getAttribute(unsigned Index,
829 StringRef Kind) const {
830 AttributeSetNode *ASN = getAttributes(Index);
831 return ASN ? ASN->getAttribute(Kind) : Attribute();
832 }
833
getParamAlignment(unsigned Index) const834 unsigned AttributeSet::getParamAlignment(unsigned Index) const {
835 AttributeSetNode *ASN = getAttributes(Index);
836 return ASN ? ASN->getAlignment() : 0;
837 }
838
getStackAlignment(unsigned Index) const839 unsigned AttributeSet::getStackAlignment(unsigned Index) const {
840 AttributeSetNode *ASN = getAttributes(Index);
841 return ASN ? ASN->getStackAlignment() : 0;
842 }
843
getAsString(unsigned Index,bool InAttrGrp) const844 std::string AttributeSet::getAsString(unsigned Index,
845 bool InAttrGrp) const {
846 AttributeSetNode *ASN = getAttributes(Index);
847 return ASN ? ASN->getAsString(InAttrGrp) : std::string("");
848 }
849
850 /// \brief The attributes for the specified index are returned.
getAttributes(unsigned Idx) const851 AttributeSetNode *AttributeSet::getAttributes(unsigned Idx) const {
852 if (!pImpl) return 0;
853
854 // Loop through to find the attribute node we want.
855 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
856 if (pImpl->getSlotIndex(I) == Idx)
857 return pImpl->getSlotNode(I);
858
859 return 0;
860 }
861
begin(unsigned Idx) const862 AttributeSet::iterator AttributeSet::begin(unsigned Idx) const {
863 if (!pImpl)
864 return ArrayRef<Attribute>().begin();
865 return pImpl->begin(Idx);
866 }
867
end(unsigned Idx) const868 AttributeSet::iterator AttributeSet::end(unsigned Idx) const {
869 if (!pImpl)
870 return ArrayRef<Attribute>().end();
871 return pImpl->end(Idx);
872 }
873
874 //===----------------------------------------------------------------------===//
875 // AttributeSet Introspection Methods
876 //===----------------------------------------------------------------------===//
877
878 /// \brief Return the number of slots used in this attribute list. This is the
879 /// number of arguments that have an attribute set on them (including the
880 /// function itself).
getNumSlots() const881 unsigned AttributeSet::getNumSlots() const {
882 return pImpl ? pImpl->getNumAttributes() : 0;
883 }
884
getSlotIndex(unsigned Slot) const885 uint64_t AttributeSet::getSlotIndex(unsigned Slot) const {
886 assert(pImpl && Slot < pImpl->getNumAttributes() &&
887 "Slot # out of range!");
888 return pImpl->getSlotIndex(Slot);
889 }
890
getSlotAttributes(unsigned Slot) const891 AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
892 assert(pImpl && Slot < pImpl->getNumAttributes() &&
893 "Slot # out of range!");
894 return pImpl->getSlotAttributes(Slot);
895 }
896
Raw(unsigned Index) const897 uint64_t AttributeSet::Raw(unsigned Index) const {
898 // FIXME: Remove this.
899 return pImpl ? pImpl->Raw(Index) : 0;
900 }
901
dump() const902 void AttributeSet::dump() const {
903 dbgs() << "PAL[\n";
904
905 for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
906 uint64_t Index = getSlotIndex(i);
907 dbgs() << " { ";
908 if (Index == ~0U)
909 dbgs() << "~0U";
910 else
911 dbgs() << Index;
912 dbgs() << " => " << getAsString(Index) << " }\n";
913 }
914
915 dbgs() << "]\n";
916 }
917
918 //===----------------------------------------------------------------------===//
919 // AttrBuilder Method Implementations
920 //===----------------------------------------------------------------------===//
921
AttrBuilder(AttributeSet AS,unsigned Idx)922 AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Idx)
923 : Attrs(0), Alignment(0), StackAlignment(0) {
924 AttributeSetImpl *pImpl = AS.pImpl;
925 if (!pImpl) return;
926
927 for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
928 if (pImpl->getSlotIndex(I) != Idx) continue;
929
930 for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
931 IE = pImpl->end(I); II != IE; ++II)
932 addAttribute(*II);
933
934 break;
935 }
936 }
937
clear()938 void AttrBuilder::clear() {
939 Attrs.reset();
940 Alignment = StackAlignment = 0;
941 }
942
addAttribute(Attribute::AttrKind Val)943 AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
944 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
945 assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
946 "Adding alignment attribute without adding alignment value!");
947 Attrs[Val] = true;
948 return *this;
949 }
950
addAttribute(Attribute Attr)951 AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
952 if (Attr.isStringAttribute()) {
953 addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
954 return *this;
955 }
956
957 Attribute::AttrKind Kind = Attr.getKindAsEnum();
958 Attrs[Kind] = true;
959
960 if (Kind == Attribute::Alignment)
961 Alignment = Attr.getAlignment();
962 else if (Kind == Attribute::StackAlignment)
963 StackAlignment = Attr.getStackAlignment();
964 return *this;
965 }
966
addAttribute(StringRef A,StringRef V)967 AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
968 TargetDepAttrs[A] = V;
969 return *this;
970 }
971
removeAttribute(Attribute::AttrKind Val)972 AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
973 assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
974 Attrs[Val] = false;
975
976 if (Val == Attribute::Alignment)
977 Alignment = 0;
978 else if (Val == Attribute::StackAlignment)
979 StackAlignment = 0;
980
981 return *this;
982 }
983
removeAttributes(AttributeSet A,uint64_t Index)984 AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
985 unsigned Idx = ~0U;
986 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
987 if (A.getSlotIndex(I) == Index) {
988 Idx = I;
989 break;
990 }
991
992 assert(Idx != ~0U && "Couldn't find index in AttributeSet!");
993
994 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx); I != E; ++I) {
995 Attribute Attr = *I;
996 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
997 Attribute::AttrKind Kind = I->getKindAsEnum();
998 Attrs[Kind] = false;
999
1000 if (Kind == Attribute::Alignment)
1001 Alignment = 0;
1002 else if (Kind == Attribute::StackAlignment)
1003 StackAlignment = 0;
1004 } else {
1005 assert(Attr.isStringAttribute() && "Invalid attribute type!");
1006 std::map<std::string, std::string>::iterator
1007 Iter = TargetDepAttrs.find(Attr.getKindAsString());
1008 if (Iter != TargetDepAttrs.end())
1009 TargetDepAttrs.erase(Iter);
1010 }
1011 }
1012
1013 return *this;
1014 }
1015
removeAttribute(StringRef A)1016 AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
1017 std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
1018 if (I != TargetDepAttrs.end())
1019 TargetDepAttrs.erase(I);
1020 return *this;
1021 }
1022
addAlignmentAttr(unsigned Align)1023 AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
1024 if (Align == 0) return *this;
1025
1026 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1027 assert(Align <= 0x40000000 && "Alignment too large.");
1028
1029 Attrs[Attribute::Alignment] = true;
1030 Alignment = Align;
1031 return *this;
1032 }
1033
addStackAlignmentAttr(unsigned Align)1034 AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
1035 // Default alignment, allow the target to define how to align it.
1036 if (Align == 0) return *this;
1037
1038 assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
1039 assert(Align <= 0x100 && "Alignment too large.");
1040
1041 Attrs[Attribute::StackAlignment] = true;
1042 StackAlignment = Align;
1043 return *this;
1044 }
1045
merge(const AttrBuilder & B)1046 AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
1047 // FIXME: What if both have alignments, but they don't match?!
1048 if (!Alignment)
1049 Alignment = B.Alignment;
1050
1051 if (!StackAlignment)
1052 StackAlignment = B.StackAlignment;
1053
1054 Attrs |= B.Attrs;
1055
1056 for (td_const_iterator I = B.TargetDepAttrs.begin(),
1057 E = B.TargetDepAttrs.end(); I != E; ++I)
1058 TargetDepAttrs[I->first] = I->second;
1059
1060 return *this;
1061 }
1062
contains(StringRef A) const1063 bool AttrBuilder::contains(StringRef A) const {
1064 return TargetDepAttrs.find(A) != TargetDepAttrs.end();
1065 }
1066
hasAttributes() const1067 bool AttrBuilder::hasAttributes() const {
1068 return !Attrs.none() || !TargetDepAttrs.empty();
1069 }
1070
hasAttributes(AttributeSet A,uint64_t Index) const1071 bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
1072 unsigned Idx = ~0U;
1073 for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
1074 if (A.getSlotIndex(I) == Index) {
1075 Idx = I;
1076 break;
1077 }
1078
1079 assert(Idx != ~0U && "Couldn't find the index!");
1080
1081 for (AttributeSet::iterator I = A.begin(Idx), E = A.end(Idx);
1082 I != E; ++I) {
1083 Attribute Attr = *I;
1084 if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
1085 if (Attrs[I->getKindAsEnum()])
1086 return true;
1087 } else {
1088 assert(Attr.isStringAttribute() && "Invalid attribute kind!");
1089 return TargetDepAttrs.find(Attr.getKindAsString())!=TargetDepAttrs.end();
1090 }
1091 }
1092
1093 return false;
1094 }
1095
hasAlignmentAttr() const1096 bool AttrBuilder::hasAlignmentAttr() const {
1097 return Alignment != 0;
1098 }
1099
operator ==(const AttrBuilder & B)1100 bool AttrBuilder::operator==(const AttrBuilder &B) {
1101 if (Attrs != B.Attrs)
1102 return false;
1103
1104 for (td_const_iterator I = TargetDepAttrs.begin(),
1105 E = TargetDepAttrs.end(); I != E; ++I)
1106 if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
1107 return false;
1108
1109 return Alignment == B.Alignment && StackAlignment == B.StackAlignment;
1110 }
1111
removeFunctionOnlyAttrs()1112 void AttrBuilder::removeFunctionOnlyAttrs() {
1113 removeAttribute(Attribute::NoReturn)
1114 .removeAttribute(Attribute::NoUnwind)
1115 .removeAttribute(Attribute::ReadNone)
1116 .removeAttribute(Attribute::ReadOnly)
1117 .removeAttribute(Attribute::NoInline)
1118 .removeAttribute(Attribute::AlwaysInline)
1119 .removeAttribute(Attribute::OptimizeForSize)
1120 .removeAttribute(Attribute::StackProtect)
1121 .removeAttribute(Attribute::StackProtectReq)
1122 .removeAttribute(Attribute::StackProtectStrong)
1123 .removeAttribute(Attribute::NoRedZone)
1124 .removeAttribute(Attribute::NoImplicitFloat)
1125 .removeAttribute(Attribute::Naked)
1126 .removeAttribute(Attribute::InlineHint)
1127 .removeAttribute(Attribute::StackAlignment)
1128 .removeAttribute(Attribute::UWTable)
1129 .removeAttribute(Attribute::NonLazyBind)
1130 .removeAttribute(Attribute::ReturnsTwice)
1131 .removeAttribute(Attribute::SanitizeAddress)
1132 .removeAttribute(Attribute::SanitizeThread)
1133 .removeAttribute(Attribute::SanitizeMemory)
1134 .removeAttribute(Attribute::MinSize)
1135 .removeAttribute(Attribute::NoDuplicate)
1136 .removeAttribute(Attribute::NoBuiltin);
1137 }
1138
addRawValue(uint64_t Val)1139 AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
1140 // FIXME: Remove this in 4.0.
1141 if (!Val) return *this;
1142
1143 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1144 I = Attribute::AttrKind(I + 1)) {
1145 if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
1146 Attrs[I] = true;
1147
1148 if (I == Attribute::Alignment)
1149 Alignment = 1ULL << ((A >> 16) - 1);
1150 else if (I == Attribute::StackAlignment)
1151 StackAlignment = 1ULL << ((A >> 26)-1);
1152 }
1153 }
1154
1155 return *this;
1156 }
1157
1158 //===----------------------------------------------------------------------===//
1159 // AttributeFuncs Function Defintions
1160 //===----------------------------------------------------------------------===//
1161
1162 /// \brief Which attributes cannot be applied to a type.
typeIncompatible(Type * Ty,uint64_t Index)1163 AttributeSet AttributeFuncs::typeIncompatible(Type *Ty, uint64_t Index) {
1164 AttrBuilder Incompatible;
1165
1166 if (!Ty->isIntegerTy())
1167 // Attribute that only apply to integers.
1168 Incompatible.addAttribute(Attribute::SExt)
1169 .addAttribute(Attribute::ZExt);
1170
1171 if (!Ty->isPointerTy())
1172 // Attribute that only apply to pointers.
1173 Incompatible.addAttribute(Attribute::ByVal)
1174 .addAttribute(Attribute::Nest)
1175 .addAttribute(Attribute::NoAlias)
1176 .addAttribute(Attribute::NoCapture)
1177 .addAttribute(Attribute::StructRet);
1178
1179 return AttributeSet::get(Ty->getContext(), Index, Incompatible);
1180 }
1181