Bug Summary

File:tools/clang/lib/CodeGen/CodeGenTypes.cpp
Warning:line 748, column 29
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name CodeGenTypes.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn373517/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/CodeGen -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn373517=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-10-02-234743-9763-1 -x c++ /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp

1//===--- CodeGenTypes.cpp - Type translation for LLVM CodeGen -------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This is the code that handles AST -> LLVM type lowering.
10//
11//===----------------------------------------------------------------------===//
12
13#include "CodeGenTypes.h"
14#include "CGCXXABI.h"
15#include "CGCall.h"
16#include "CGOpenCLRuntime.h"
17#include "CGRecordLayout.h"
18#include "TargetInfo.h"
19#include "clang/AST/ASTContext.h"
20#include "clang/AST/DeclCXX.h"
21#include "clang/AST/DeclObjC.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/RecordLayout.h"
24#include "clang/CodeGen/CGFunctionInfo.h"
25#include "llvm/IR/DataLayout.h"
26#include "llvm/IR/DerivedTypes.h"
27#include "llvm/IR/Module.h"
28using namespace clang;
29using namespace CodeGen;
30
31CodeGenTypes::CodeGenTypes(CodeGenModule &cgm)
32 : CGM(cgm), Context(cgm.getContext()), TheModule(cgm.getModule()),
33 Target(cgm.getTarget()), TheCXXABI(cgm.getCXXABI()),
34 TheABIInfo(cgm.getTargetCodeGenInfo().getABIInfo()) {
35 SkippedLayout = false;
36}
37
38CodeGenTypes::~CodeGenTypes() {
39 llvm::DeleteContainerSeconds(CGRecordLayouts);
40
41 for (llvm::FoldingSet<CGFunctionInfo>::iterator
42 I = FunctionInfos.begin(), E = FunctionInfos.end(); I != E; )
43 delete &*I++;
44}
45
46const CodeGenOptions &CodeGenTypes::getCodeGenOpts() const {
47 return CGM.getCodeGenOpts();
48}
49
50void CodeGenTypes::addRecordTypeName(const RecordDecl *RD,
51 llvm::StructType *Ty,
52 StringRef suffix) {
53 SmallString<256> TypeName;
54 llvm::raw_svector_ostream OS(TypeName);
55 OS << RD->getKindName() << '.';
56
57 // Name the codegen type after the typedef name
58 // if there is no tag type name available
59 if (RD->getIdentifier()) {
60 // FIXME: We should not have to check for a null decl context here.
61 // Right now we do it because the implicit Obj-C decls don't have one.
62 if (RD->getDeclContext())
63 RD->printQualifiedName(OS);
64 else
65 RD->printName(OS);
66 } else if (const TypedefNameDecl *TDD = RD->getTypedefNameForAnonDecl()) {
67 // FIXME: We should not have to check for a null decl context here.
68 // Right now we do it because the implicit Obj-C decls don't have one.
69 if (TDD->getDeclContext())
70 TDD->printQualifiedName(OS);
71 else
72 TDD->printName(OS);
73 } else
74 OS << "anon";
75
76 if (!suffix.empty())
77 OS << suffix;
78
79 Ty->setName(OS.str());
80}
81
82/// ConvertTypeForMem - Convert type T into a llvm::Type. This differs from
83/// ConvertType in that it is used to convert to the memory representation for
84/// a type. For example, the scalar representation for _Bool is i1, but the
85/// memory representation is usually i8 or i32, depending on the target.
86llvm::Type *CodeGenTypes::ConvertTypeForMem(QualType T) {
87 llvm::Type *R = ConvertType(T);
88
89 // If this is a non-bool type, don't map it.
90 if (!R->isIntegerTy(1))
91 return R;
92
93 // Otherwise, return an integer of the target-specified size.
94 return llvm::IntegerType::get(getLLVMContext(),
95 (unsigned)Context.getTypeSize(T));
96}
97
98
99/// isRecordLayoutComplete - Return true if the specified type is already
100/// completely laid out.
101bool CodeGenTypes::isRecordLayoutComplete(const Type *Ty) const {
102 llvm::DenseMap<const Type*, llvm::StructType *>::const_iterator I =
103 RecordDeclTypes.find(Ty);
104 return I != RecordDeclTypes.end() && !I->second->isOpaque();
105}
106
107static bool
108isSafeToConvert(QualType T, CodeGenTypes &CGT,
109 llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked);
110
111
112/// isSafeToConvert - Return true if it is safe to convert the specified record
113/// decl to IR and lay it out, false if doing so would cause us to get into a
114/// recursive compilation mess.
115static bool
116isSafeToConvert(const RecordDecl *RD, CodeGenTypes &CGT,
117 llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked) {
118 // If we have already checked this type (maybe the same type is used by-value
119 // multiple times in multiple structure fields, don't check again.
120 if (!AlreadyChecked.insert(RD).second)
121 return true;
122
123 const Type *Key = CGT.getContext().getTagDeclType(RD).getTypePtr();
124
125 // If this type is already laid out, converting it is a noop.
126 if (CGT.isRecordLayoutComplete(Key)) return true;
127
128 // If this type is currently being laid out, we can't recursively compile it.
129 if (CGT.isRecordBeingLaidOut(Key))
130 return false;
131
132 // If this type would require laying out bases that are currently being laid
133 // out, don't do it. This includes virtual base classes which get laid out
134 // when a class is translated, even though they aren't embedded by-value into
135 // the class.
136 if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
137 for (const auto &I : CRD->bases())
138 if (!isSafeToConvert(I.getType()->getAs<RecordType>()->getDecl(),
139 CGT, AlreadyChecked))
140 return false;
141 }
142
143 // If this type would require laying out members that are currently being laid
144 // out, don't do it.
145 for (const auto *I : RD->fields())
146 if (!isSafeToConvert(I->getType(), CGT, AlreadyChecked))
147 return false;
148
149 // If there are no problems, lets do it.
150 return true;
151}
152
153/// isSafeToConvert - Return true if it is safe to convert this field type,
154/// which requires the structure elements contained by-value to all be
155/// recursively safe to convert.
156static bool
157isSafeToConvert(QualType T, CodeGenTypes &CGT,
158 llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked) {
159 // Strip off atomic type sugar.
160 if (const auto *AT = T->getAs<AtomicType>())
161 T = AT->getValueType();
162
163 // If this is a record, check it.
164 if (const auto *RT = T->getAs<RecordType>())
165 return isSafeToConvert(RT->getDecl(), CGT, AlreadyChecked);
166
167 // If this is an array, check the elements, which are embedded inline.
168 if (const auto *AT = CGT.getContext().getAsArrayType(T))
169 return isSafeToConvert(AT->getElementType(), CGT, AlreadyChecked);
170
171 // Otherwise, there is no concern about transforming this. We only care about
172 // things that are contained by-value in a structure that can have another
173 // structure as a member.
174 return true;
175}
176
177
178/// isSafeToConvert - Return true if it is safe to convert the specified record
179/// decl to IR and lay it out, false if doing so would cause us to get into a
180/// recursive compilation mess.
181static bool isSafeToConvert(const RecordDecl *RD, CodeGenTypes &CGT) {
182 // If no structs are being laid out, we can certainly do this one.
183 if (CGT.noRecordsBeingLaidOut()) return true;
184
185 llvm::SmallPtrSet<const RecordDecl*, 16> AlreadyChecked;
186 return isSafeToConvert(RD, CGT, AlreadyChecked);
187}
188
189/// isFuncParamTypeConvertible - Return true if the specified type in a
190/// function parameter or result position can be converted to an IR type at this
191/// point. This boils down to being whether it is complete, as well as whether
192/// we've temporarily deferred expanding the type because we're in a recursive
193/// context.
194bool CodeGenTypes::isFuncParamTypeConvertible(QualType Ty) {
195 // Some ABIs cannot have their member pointers represented in IR unless
196 // certain circumstances have been reached.
197 if (const auto *MPT = Ty->getAs<MemberPointerType>())
198 return getCXXABI().isMemberPointerConvertible(MPT);
199
200 // If this isn't a tagged type, we can convert it!
201 const TagType *TT = Ty->getAs<TagType>();
202 if (!TT) return true;
203
204 // Incomplete types cannot be converted.
205 if (TT->isIncompleteType())
206 return false;
207
208 // If this is an enum, then it is always safe to convert.
209 const RecordType *RT = dyn_cast<RecordType>(TT);
210 if (!RT) return true;
211
212 // Otherwise, we have to be careful. If it is a struct that we're in the
213 // process of expanding, then we can't convert the function type. That's ok
214 // though because we must be in a pointer context under the struct, so we can
215 // just convert it to a dummy type.
216 //
217 // We decide this by checking whether ConvertRecordDeclType returns us an
218 // opaque type for a struct that we know is defined.
219 return isSafeToConvert(RT->getDecl(), *this);
220}
221
222
223/// Code to verify a given function type is complete, i.e. the return type
224/// and all of the parameter types are complete. Also check to see if we are in
225/// a RS_StructPointer context, and if so whether any struct types have been
226/// pended. If so, we don't want to ask the ABI lowering code to handle a type
227/// that cannot be converted to an IR type.
228bool CodeGenTypes::isFuncTypeConvertible(const FunctionType *FT) {
229 if (!isFuncParamTypeConvertible(FT->getReturnType()))
230 return false;
231
232 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT))
233 for (unsigned i = 0, e = FPT->getNumParams(); i != e; i++)
234 if (!isFuncParamTypeConvertible(FPT->getParamType(i)))
235 return false;
236
237 return true;
238}
239
240/// UpdateCompletedType - When we find the full definition for a TagDecl,
241/// replace the 'opaque' type we previously made for it if applicable.
242void CodeGenTypes::UpdateCompletedType(const TagDecl *TD) {
243 // If this is an enum being completed, then we flush all non-struct types from
244 // the cache. This allows function types and other things that may be derived
245 // from the enum to be recomputed.
246 if (const EnumDecl *ED = dyn_cast<EnumDecl>(TD)) {
247 // Only flush the cache if we've actually already converted this type.
248 if (TypeCache.count(ED->getTypeForDecl())) {
249 // Okay, we formed some types based on this. We speculated that the enum
250 // would be lowered to i32, so we only need to flush the cache if this
251 // didn't happen.
252 if (!ConvertType(ED->getIntegerType())->isIntegerTy(32))
253 TypeCache.clear();
254 }
255 // If necessary, provide the full definition of a type only used with a
256 // declaration so far.
257 if (CGDebugInfo *DI = CGM.getModuleDebugInfo())
258 DI->completeType(ED);
259 return;
260 }
261
262 // If we completed a RecordDecl that we previously used and converted to an
263 // anonymous type, then go ahead and complete it now.
264 const RecordDecl *RD = cast<RecordDecl>(TD);
265 if (RD->isDependentType()) return;
266
267 // Only complete it if we converted it already. If we haven't converted it
268 // yet, we'll just do it lazily.
269 if (RecordDeclTypes.count(Context.getTagDeclType(RD).getTypePtr()))
270 ConvertRecordDeclType(RD);
271
272 // If necessary, provide the full definition of a type only used with a
273 // declaration so far.
274 if (CGDebugInfo *DI = CGM.getModuleDebugInfo())
275 DI->completeType(RD);
276}
277
278void CodeGenTypes::RefreshTypeCacheForClass(const CXXRecordDecl *RD) {
279 QualType T = Context.getRecordType(RD);
280 T = Context.getCanonicalType(T);
281
282 const Type *Ty = T.getTypePtr();
283 if (RecordsWithOpaqueMemberPointers.count(Ty)) {
284 TypeCache.clear();
285 RecordsWithOpaqueMemberPointers.clear();
286 }
287}
288
289static llvm::Type *getTypeForFormat(llvm::LLVMContext &VMContext,
290 const llvm::fltSemantics &format,
291 bool UseNativeHalf = false) {
292 if (&format == &llvm::APFloat::IEEEhalf()) {
293 if (UseNativeHalf)
294 return llvm::Type::getHalfTy(VMContext);
295 else
296 return llvm::Type::getInt16Ty(VMContext);
297 }
298 if (&format == &llvm::APFloat::IEEEsingle())
299 return llvm::Type::getFloatTy(VMContext);
300 if (&format == &llvm::APFloat::IEEEdouble())
301 return llvm::Type::getDoubleTy(VMContext);
302 if (&format == &llvm::APFloat::IEEEquad())
303 return llvm::Type::getFP128Ty(VMContext);
304 if (&format == &llvm::APFloat::PPCDoubleDouble())
305 return llvm::Type::getPPC_FP128Ty(VMContext);
306 if (&format == &llvm::APFloat::x87DoubleExtended())
307 return llvm::Type::getX86_FP80Ty(VMContext);
308 llvm_unreachable("Unknown float format!")::llvm::llvm_unreachable_internal("Unknown float format!", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 308)
;
309}
310
311llvm::Type *CodeGenTypes::ConvertFunctionTypeInternal(QualType QFT) {
312 assert(QFT.isCanonical())((QFT.isCanonical()) ? static_cast<void> (0) : __assert_fail
("QFT.isCanonical()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 312, __PRETTY_FUNCTION__))
;
313 const Type *Ty = QFT.getTypePtr();
314 const FunctionType *FT = cast<FunctionType>(QFT.getTypePtr());
315 // First, check whether we can build the full function type. If the
316 // function type depends on an incomplete type (e.g. a struct or enum), we
317 // cannot lower the function type.
318 if (!isFuncTypeConvertible(FT)) {
319 // This function's type depends on an incomplete tag type.
320
321 // Force conversion of all the relevant record types, to make sure
322 // we re-convert the FunctionType when appropriate.
323 if (const RecordType *RT = FT->getReturnType()->getAs<RecordType>())
324 ConvertRecordDeclType(RT->getDecl());
325 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT))
326 for (unsigned i = 0, e = FPT->getNumParams(); i != e; i++)
327 if (const RecordType *RT = FPT->getParamType(i)->getAs<RecordType>())
328 ConvertRecordDeclType(RT->getDecl());
329
330 SkippedLayout = true;
331
332 // Return a placeholder type.
333 return llvm::StructType::get(getLLVMContext());
334 }
335
336 // While we're converting the parameter types for a function, we don't want
337 // to recursively convert any pointed-to structs. Converting directly-used
338 // structs is ok though.
339 if (!RecordsBeingLaidOut.insert(Ty).second) {
340 SkippedLayout = true;
341 return llvm::StructType::get(getLLVMContext());
342 }
343
344 // The function type can be built; call the appropriate routines to
345 // build it.
346 const CGFunctionInfo *FI;
347 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) {
348 FI = &arrangeFreeFunctionType(
349 CanQual<FunctionProtoType>::CreateUnsafe(QualType(FPT, 0)));
350 } else {
351 const FunctionNoProtoType *FNPT = cast<FunctionNoProtoType>(FT);
352 FI = &arrangeFreeFunctionType(
353 CanQual<FunctionNoProtoType>::CreateUnsafe(QualType(FNPT, 0)));
354 }
355
356 llvm::Type *ResultType = nullptr;
357 // If there is something higher level prodding our CGFunctionInfo, then
358 // don't recurse into it again.
359 if (FunctionsBeingProcessed.count(FI)) {
360
361 ResultType = llvm::StructType::get(getLLVMContext());
362 SkippedLayout = true;
363 } else {
364
365 // Otherwise, we're good to go, go ahead and convert it.
366 ResultType = GetFunctionType(*FI);
367 }
368
369 RecordsBeingLaidOut.erase(Ty);
370
371 if (SkippedLayout)
372 TypeCache.clear();
373
374 if (RecordsBeingLaidOut.empty())
375 while (!DeferredRecords.empty())
376 ConvertRecordDeclType(DeferredRecords.pop_back_val());
377 return ResultType;
378}
379
380/// ConvertType - Convert the specified type to its LLVM form.
381llvm::Type *CodeGenTypes::ConvertType(QualType T) {
382 T = Context.getCanonicalType(T);
383
384 const Type *Ty = T.getTypePtr();
385
386 // RecordTypes are cached and processed specially.
387 if (const RecordType *RT = dyn_cast<RecordType>(Ty))
388 return ConvertRecordDeclType(RT->getDecl());
389
390 // See if type is already cached.
391 llvm::DenseMap<const Type *, llvm::Type *>::iterator TCI = TypeCache.find(Ty);
392 // If type is found in map then use it. Otherwise, convert type T.
393 if (TCI != TypeCache.end())
394 return TCI->second;
395
396 // If we don't have it in the cache, convert it now.
397 llvm::Type *ResultType = nullptr;
398 switch (Ty->getTypeClass()) {
399 case Type::Record: // Handled above.
400#define TYPE(Class, Base)
401#define ABSTRACT_TYPE(Class, Base)
402#define NON_CANONICAL_TYPE(Class, Base) case Type::Class:
403#define DEPENDENT_TYPE(Class, Base) case Type::Class:
404#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class:
405#include "clang/AST/TypeNodes.inc"
406 llvm_unreachable("Non-canonical or dependent types aren't possible.")::llvm::llvm_unreachable_internal("Non-canonical or dependent types aren't possible."
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 406)
;
407
408 case Type::Builtin: {
409 switch (cast<BuiltinType>(Ty)->getKind()) {
410 case BuiltinType::Void:
411 case BuiltinType::ObjCId:
412 case BuiltinType::ObjCClass:
413 case BuiltinType::ObjCSel:
414 // LLVM void type can only be used as the result of a function call. Just
415 // map to the same as char.
416 ResultType = llvm::Type::getInt8Ty(getLLVMContext());
417 break;
418
419 case BuiltinType::Bool:
420 // Note that we always return bool as i1 for use as a scalar type.
421 ResultType = llvm::Type::getInt1Ty(getLLVMContext());
422 break;
423
424 case BuiltinType::Char_S:
425 case BuiltinType::Char_U:
426 case BuiltinType::SChar:
427 case BuiltinType::UChar:
428 case BuiltinType::Short:
429 case BuiltinType::UShort:
430 case BuiltinType::Int:
431 case BuiltinType::UInt:
432 case BuiltinType::Long:
433 case BuiltinType::ULong:
434 case BuiltinType::LongLong:
435 case BuiltinType::ULongLong:
436 case BuiltinType::WChar_S:
437 case BuiltinType::WChar_U:
438 case BuiltinType::Char8:
439 case BuiltinType::Char16:
440 case BuiltinType::Char32:
441 case BuiltinType::ShortAccum:
442 case BuiltinType::Accum:
443 case BuiltinType::LongAccum:
444 case BuiltinType::UShortAccum:
445 case BuiltinType::UAccum:
446 case BuiltinType::ULongAccum:
447 case BuiltinType::ShortFract:
448 case BuiltinType::Fract:
449 case BuiltinType::LongFract:
450 case BuiltinType::UShortFract:
451 case BuiltinType::UFract:
452 case BuiltinType::ULongFract:
453 case BuiltinType::SatShortAccum:
454 case BuiltinType::SatAccum:
455 case BuiltinType::SatLongAccum:
456 case BuiltinType::SatUShortAccum:
457 case BuiltinType::SatUAccum:
458 case BuiltinType::SatULongAccum:
459 case BuiltinType::SatShortFract:
460 case BuiltinType::SatFract:
461 case BuiltinType::SatLongFract:
462 case BuiltinType::SatUShortFract:
463 case BuiltinType::SatUFract:
464 case BuiltinType::SatULongFract:
465 ResultType = llvm::IntegerType::get(getLLVMContext(),
466 static_cast<unsigned>(Context.getTypeSize(T)));
467 break;
468
469 case BuiltinType::Float16:
470 ResultType =
471 getTypeForFormat(getLLVMContext(), Context.getFloatTypeSemantics(T),
472 /* UseNativeHalf = */ true);
473 break;
474
475 case BuiltinType::Half:
476 // Half FP can either be storage-only (lowered to i16) or native.
477 ResultType = getTypeForFormat(
478 getLLVMContext(), Context.getFloatTypeSemantics(T),
479 Context.getLangOpts().NativeHalfType ||
480 !Context.getTargetInfo().useFP16ConversionIntrinsics());
481 break;
482 case BuiltinType::Float:
483 case BuiltinType::Double:
484 case BuiltinType::LongDouble:
485 case BuiltinType::Float128:
486 ResultType = getTypeForFormat(getLLVMContext(),
487 Context.getFloatTypeSemantics(T),
488 /* UseNativeHalf = */ false);
489 break;
490
491 case BuiltinType::NullPtr:
492 // Model std::nullptr_t as i8*
493 ResultType = llvm::Type::getInt8PtrTy(getLLVMContext());
494 break;
495
496 case BuiltinType::UInt128:
497 case BuiltinType::Int128:
498 ResultType = llvm::IntegerType::get(getLLVMContext(), 128);
499 break;
500
501#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
502 case BuiltinType::Id:
503#include "clang/Basic/OpenCLImageTypes.def"
504#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
505 case BuiltinType::Id:
506#include "clang/Basic/OpenCLExtensionTypes.def"
507 case BuiltinType::OCLSampler:
508 case BuiltinType::OCLEvent:
509 case BuiltinType::OCLClkEvent:
510 case BuiltinType::OCLQueue:
511 case BuiltinType::OCLReserveID:
512 ResultType = CGM.getOpenCLRuntime().convertOpenCLSpecificType(Ty);
513 break;
514
515 // TODO: real CodeGen support for SVE types requires more infrastructure
516 // to be added first. Report an error until then.
517#define SVE_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
518#include "clang/Basic/AArch64SVEACLETypes.def"
519 {
520 unsigned DiagID = CGM.getDiags().getCustomDiagID(
521 DiagnosticsEngine::Error,
522 "cannot yet generate code for SVE type '%0'");
523 auto *BT = cast<BuiltinType>(Ty);
524 auto Name = BT->getName(CGM.getContext().getPrintingPolicy());
525 CGM.getDiags().Report(DiagID) << Name;
526 // Return something safe.
527 ResultType = llvm::IntegerType::get(getLLVMContext(), 32);
528 break;
529 }
530
531 case BuiltinType::Dependent:
532#define BUILTIN_TYPE(Id, SingletonId)
533#define PLACEHOLDER_TYPE(Id, SingletonId) \
534 case BuiltinType::Id:
535#include "clang/AST/BuiltinTypes.def"
536 llvm_unreachable("Unexpected placeholder builtin type!")::llvm::llvm_unreachable_internal("Unexpected placeholder builtin type!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 536)
;
537 }
538 break;
539 }
540 case Type::Auto:
541 case Type::DeducedTemplateSpecialization:
542 llvm_unreachable("Unexpected undeduced type!")::llvm::llvm_unreachable_internal("Unexpected undeduced type!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 542)
;
543 case Type::Complex: {
544 llvm::Type *EltTy = ConvertType(cast<ComplexType>(Ty)->getElementType());
545 ResultType = llvm::StructType::get(EltTy, EltTy);
546 break;
547 }
548 case Type::LValueReference:
549 case Type::RValueReference: {
550 const ReferenceType *RTy = cast<ReferenceType>(Ty);
551 QualType ETy = RTy->getPointeeType();
552 llvm::Type *PointeeType = ConvertTypeForMem(ETy);
553 unsigned AS = Context.getTargetAddressSpace(ETy);
554 ResultType = llvm::PointerType::get(PointeeType, AS);
555 break;
556 }
557 case Type::Pointer: {
558 const PointerType *PTy = cast<PointerType>(Ty);
559 QualType ETy = PTy->getPointeeType();
560 llvm::Type *PointeeType = ConvertTypeForMem(ETy);
561 if (PointeeType->isVoidTy())
562 PointeeType = llvm::Type::getInt8Ty(getLLVMContext());
563 unsigned AS = Context.getTargetAddressSpace(ETy);
564 ResultType = llvm::PointerType::get(PointeeType, AS);
565 break;
566 }
567
568 case Type::VariableArray: {
569 const VariableArrayType *A = cast<VariableArrayType>(Ty);
570 assert(A->getIndexTypeCVRQualifiers() == 0 &&((A->getIndexTypeCVRQualifiers() == 0 && "FIXME: We only handle trivial array types so far!"
) ? static_cast<void> (0) : __assert_fail ("A->getIndexTypeCVRQualifiers() == 0 && \"FIXME: We only handle trivial array types so far!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 571, __PRETTY_FUNCTION__))
571 "FIXME: We only handle trivial array types so far!")((A->getIndexTypeCVRQualifiers() == 0 && "FIXME: We only handle trivial array types so far!"
) ? static_cast<void> (0) : __assert_fail ("A->getIndexTypeCVRQualifiers() == 0 && \"FIXME: We only handle trivial array types so far!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 571, __PRETTY_FUNCTION__))
;
572 // VLAs resolve to the innermost element type; this matches
573 // the return of alloca, and there isn't any obviously better choice.
574 ResultType = ConvertTypeForMem(A->getElementType());
575 break;
576 }
577 case Type::IncompleteArray: {
578 const IncompleteArrayType *A = cast<IncompleteArrayType>(Ty);
579 assert(A->getIndexTypeCVRQualifiers() == 0 &&((A->getIndexTypeCVRQualifiers() == 0 && "FIXME: We only handle trivial array types so far!"
) ? static_cast<void> (0) : __assert_fail ("A->getIndexTypeCVRQualifiers() == 0 && \"FIXME: We only handle trivial array types so far!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 580, __PRETTY_FUNCTION__))
580 "FIXME: We only handle trivial array types so far!")((A->getIndexTypeCVRQualifiers() == 0 && "FIXME: We only handle trivial array types so far!"
) ? static_cast<void> (0) : __assert_fail ("A->getIndexTypeCVRQualifiers() == 0 && \"FIXME: We only handle trivial array types so far!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 580, __PRETTY_FUNCTION__))
;
581 // int X[] -> [0 x int], unless the element type is not sized. If it is
582 // unsized (e.g. an incomplete struct) just use [0 x i8].
583 ResultType = ConvertTypeForMem(A->getElementType());
584 if (!ResultType->isSized()) {
585 SkippedLayout = true;
586 ResultType = llvm::Type::getInt8Ty(getLLVMContext());
587 }
588 ResultType = llvm::ArrayType::get(ResultType, 0);
589 break;
590 }
591 case Type::ConstantArray: {
592 const ConstantArrayType *A = cast<ConstantArrayType>(Ty);
593 llvm::Type *EltTy = ConvertTypeForMem(A->getElementType());
594
595 // Lower arrays of undefined struct type to arrays of i8 just to have a
596 // concrete type.
597 if (!EltTy->isSized()) {
598 SkippedLayout = true;
599 EltTy = llvm::Type::getInt8Ty(getLLVMContext());
600 }
601
602 ResultType = llvm::ArrayType::get(EltTy, A->getSize().getZExtValue());
603 break;
604 }
605 case Type::ExtVector:
606 case Type::Vector: {
607 const VectorType *VT = cast<VectorType>(Ty);
608 ResultType = llvm::VectorType::get(ConvertType(VT->getElementType()),
609 VT->getNumElements());
610 break;
611 }
612 case Type::FunctionNoProto:
613 case Type::FunctionProto:
614 ResultType = ConvertFunctionTypeInternal(T);
615 break;
616 case Type::ObjCObject:
617 ResultType = ConvertType(cast<ObjCObjectType>(Ty)->getBaseType());
618 break;
619
620 case Type::ObjCInterface: {
621 // Objective-C interfaces are always opaque (outside of the
622 // runtime, which can do whatever it likes); we never refine
623 // these.
624 llvm::Type *&T = InterfaceTypes[cast<ObjCInterfaceType>(Ty)];
625 if (!T)
626 T = llvm::StructType::create(getLLVMContext());
627 ResultType = T;
628 break;
629 }
630
631 case Type::ObjCObjectPointer: {
632 // Protocol qualifications do not influence the LLVM type, we just return a
633 // pointer to the underlying interface type. We don't need to worry about
634 // recursive conversion.
635 llvm::Type *T =
636 ConvertTypeForMem(cast<ObjCObjectPointerType>(Ty)->getPointeeType());
637 ResultType = T->getPointerTo();
638 break;
639 }
640
641 case Type::Enum: {
642 const EnumDecl *ED = cast<EnumType>(Ty)->getDecl();
643 if (ED->isCompleteDefinition() || ED->isFixed())
644 return ConvertType(ED->getIntegerType());
645 // Return a placeholder 'i32' type. This can be changed later when the
646 // type is defined (see UpdateCompletedType), but is likely to be the
647 // "right" answer.
648 ResultType = llvm::Type::getInt32Ty(getLLVMContext());
649 break;
650 }
651
652 case Type::BlockPointer: {
653 const QualType FTy = cast<BlockPointerType>(Ty)->getPointeeType();
654 llvm::Type *PointeeType = CGM.getLangOpts().OpenCL
655 ? CGM.getGenericBlockLiteralType()
656 : ConvertTypeForMem(FTy);
657 unsigned AS = Context.getTargetAddressSpace(FTy);
658 ResultType = llvm::PointerType::get(PointeeType, AS);
659 break;
660 }
661
662 case Type::MemberPointer: {
663 auto *MPTy = cast<MemberPointerType>(Ty);
664 if (!getCXXABI().isMemberPointerConvertible(MPTy)) {
665 RecordsWithOpaqueMemberPointers.insert(MPTy->getClass());
666 ResultType = llvm::StructType::create(getLLVMContext());
667 } else {
668 ResultType = getCXXABI().ConvertMemberPointerType(MPTy);
669 }
670 break;
671 }
672
673 case Type::Atomic: {
674 QualType valueType = cast<AtomicType>(Ty)->getValueType();
675 ResultType = ConvertTypeForMem(valueType);
676
677 // Pad out to the inflated size if necessary.
678 uint64_t valueSize = Context.getTypeSize(valueType);
679 uint64_t atomicSize = Context.getTypeSize(Ty);
680 if (valueSize != atomicSize) {
681 assert(valueSize < atomicSize)((valueSize < atomicSize) ? static_cast<void> (0) : __assert_fail
("valueSize < atomicSize", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 681, __PRETTY_FUNCTION__))
;
682 llvm::Type *elts[] = {
683 ResultType,
684 llvm::ArrayType::get(CGM.Int8Ty, (atomicSize - valueSize) / 8)
685 };
686 ResultType = llvm::StructType::get(getLLVMContext(),
687 llvm::makeArrayRef(elts));
688 }
689 break;
690 }
691 case Type::Pipe: {
692 ResultType = CGM.getOpenCLRuntime().getPipeType(cast<PipeType>(Ty));
693 break;
694 }
695 }
696
697 assert(ResultType && "Didn't convert a type?")((ResultType && "Didn't convert a type?") ? static_cast
<void> (0) : __assert_fail ("ResultType && \"Didn't convert a type?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 697, __PRETTY_FUNCTION__))
;
698
699 TypeCache[Ty] = ResultType;
700 return ResultType;
701}
702
703bool CodeGenModule::isPaddedAtomicType(QualType type) {
704 return isPaddedAtomicType(type->castAs<AtomicType>());
705}
706
707bool CodeGenModule::isPaddedAtomicType(const AtomicType *type) {
708 return Context.getTypeSize(type) != Context.getTypeSize(type->getValueType());
709}
710
711/// ConvertRecordDeclType - Lay out a tagged decl type like struct or union.
712llvm::StructType *CodeGenTypes::ConvertRecordDeclType(const RecordDecl *RD) {
713 // TagDecl's are not necessarily unique, instead use the (clang)
714 // type connected to the decl.
715 const Type *Key = Context.getTagDeclType(RD).getTypePtr();
716
717 llvm::StructType *&Entry = RecordDeclTypes[Key];
718
719 // If we don't have a StructType at all yet, create the forward declaration.
720 if (!Entry) {
15
Assuming 'Entry' is non-null
16
Taking false branch
31
Assuming 'Entry' is non-null
32
Taking false branch
721 Entry = llvm::StructType::create(getLLVMContext());
722 addRecordTypeName(RD, Entry, "");
723 }
724 llvm::StructType *Ty = Entry;
725
726 // If this is still a forward declaration, or the LLVM type is already
727 // complete, there's nothing more to do.
728 RD = RD->getDefinition();
729 if (!RD
16.1
'RD' is non-null
32.1
'RD' is non-null
16.1
'RD' is non-null
32.1
'RD' is non-null
|| !RD->isCompleteDefinition() || !Ty->isOpaque())
17
Assuming the condition is false
18
Taking false branch
33
Assuming the condition is false
34
Calling 'StructType::isOpaque'
37
Returning from 'StructType::isOpaque'
38
Taking false branch
730 return Ty;
731
732 // If converting this type would cause us to infinitely loop, don't do it!
733 if (!isSafeToConvert(RD, *this)) {
19
Taking false branch
39
Assuming the condition is false
40
Taking false branch
734 DeferredRecords.push_back(RD);
735 return Ty;
736 }
737
738 // Okay, this is a definition of a type. Compile the implementation now.
739 bool InsertResult = RecordsBeingLaidOut.insert(Key).second;
740 (void)InsertResult;
741 assert(InsertResult && "Recursively compiling a struct?")((InsertResult && "Recursively compiling a struct?") ?
static_cast<void> (0) : __assert_fail ("InsertResult && \"Recursively compiling a struct?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 741, __PRETTY_FUNCTION__))
;
20
Assuming 'InsertResult' is true
21
'?' condition is true
41
Assuming 'InsertResult' is true
42
'?' condition is true
742
743 // Force conversion of non-virtual base classes recursively.
744 if (const CXXRecordDecl *CRD
22.1
'CRD' is null
43.1
'CRD' is non-null
22.1
'CRD' is null
43.1
'CRD' is non-null
= dyn_cast<CXXRecordDecl>(RD)) {
22
Assuming 'RD' is not a 'CXXRecordDecl'
23
Taking false branch
43
Assuming 'RD' is a 'CXXRecordDecl'
44
Taking true branch
745 for (const auto &I : CRD->bases()) {
45
Assuming '__begin2' is not equal to '__end2'
746 if (I.isVirtual()) continue;
46
Assuming the condition is false
47
Taking false branch
747
748 ConvertRecordDeclType(I.getType()->getAs<RecordType>()->getDecl());
48
Assuming the object is not a 'RecordType'
49
Called C++ object pointer is null
749 }
750 }
751
752 // Layout fields.
753 CGRecordLayout *Layout = ComputeRecordLayout(RD, Ty);
754 CGRecordLayouts[Key] = Layout;
755
756 // We're done laying out this struct.
757 bool EraseResult = RecordsBeingLaidOut.erase(Key); (void)EraseResult;
758 assert(EraseResult && "struct not in RecordsBeingLaidOut set?")((EraseResult && "struct not in RecordsBeingLaidOut set?"
) ? static_cast<void> (0) : __assert_fail ("EraseResult && \"struct not in RecordsBeingLaidOut set?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 758, __PRETTY_FUNCTION__))
;
24
Assuming 'EraseResult' is true
25
'?' condition is true
759
760 // If this struct blocked a FunctionType conversion, then recompute whatever
761 // was derived from that.
762 // FIXME: This is hugely overconservative.
763 if (SkippedLayout)
26
Assuming field 'SkippedLayout' is false
27
Taking false branch
764 TypeCache.clear();
765
766 // If we're done converting the outer-most record, then convert any deferred
767 // structs as well.
768 if (RecordsBeingLaidOut.empty())
28
Taking true branch
769 while (!DeferredRecords.empty())
29
Loop condition is true. Entering loop body
770 ConvertRecordDeclType(DeferredRecords.pop_back_val());
30
Calling 'CodeGenTypes::ConvertRecordDeclType'
771
772 return Ty;
773}
774
775/// getCGRecordLayout - Return record layout info for the given record decl.
776const CGRecordLayout &
777CodeGenTypes::getCGRecordLayout(const RecordDecl *RD) {
778 const Type *Key = Context.getTagDeclType(RD).getTypePtr();
779
780 const CGRecordLayout *Layout = CGRecordLayouts.lookup(Key);
781 if (!Layout) {
12
Assuming 'Layout' is null
13
Taking true branch
782 // Compute the type information.
783 ConvertRecordDeclType(RD);
14
Calling 'CodeGenTypes::ConvertRecordDeclType'
784
785 // Now try again.
786 Layout = CGRecordLayouts.lookup(Key);
787 }
788
789 assert(Layout && "Unable to find record layout information for type")((Layout && "Unable to find record layout information for type"
) ? static_cast<void> (0) : __assert_fail ("Layout && \"Unable to find record layout information for type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 789, __PRETTY_FUNCTION__))
;
790 return *Layout;
791}
792
793bool CodeGenTypes::isPointerZeroInitializable(QualType T) {
794 assert((T->isAnyPointerType() || T->isBlockPointerType()) && "Invalid type")(((T->isAnyPointerType() || T->isBlockPointerType()) &&
"Invalid type") ? static_cast<void> (0) : __assert_fail
("(T->isAnyPointerType() || T->isBlockPointerType()) && \"Invalid type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenTypes.cpp"
, 794, __PRETTY_FUNCTION__))
;
1
'?' condition is true
795 return isZeroInitializable(T);
2
Calling 'CodeGenTypes::isZeroInitializable'
796}
797
798bool CodeGenTypes::isZeroInitializable(QualType T) {
799 if (T->getAs<PointerType>())
3
Assuming the object is not a 'PointerType'
4
Taking false branch
800 return Context.getTargetNullPointerValue(T) == 0;
801
802 if (const auto *AT = Context.getAsArrayType(T)) {
5
Assuming 'AT' is null
6
Taking false branch
803 if (isa<IncompleteArrayType>(AT))
804 return true;
805 if (const auto *CAT = dyn_cast<ConstantArrayType>(AT))
806 if (Context.getConstantArrayElementCount(CAT) == 0)
807 return true;
808 T = Context.getBaseElementType(T);
809 }
810
811 // Records are non-zero-initializable if they contain any
812 // non-zero-initializable subobjects.
813 if (const RecordType *RT = T->getAs<RecordType>()) {
7
Assuming the object is a 'RecordType'
8
Assuming 'RT' is non-null
9
Taking true branch
814 const RecordDecl *RD = RT->getDecl();
815 return isZeroInitializable(RD);
10
Calling 'CodeGenTypes::isZeroInitializable'
816 }
817
818 // We have to ask the ABI about member pointers.
819 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>())
820 return getCXXABI().isZeroInitializable(MPT);
821
822 // Everything else is okay.
823 return true;
824}
825
826bool CodeGenTypes::isZeroInitializable(const RecordDecl *RD) {
827 return getCGRecordLayout(RD).isZeroInitializable();
11
Calling 'CodeGenTypes::getCGRecordLayout'
828}

/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h

1//===- llvm/DerivedTypes.h - Classes for handling data types ----*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file contains the declarations of classes that represent "derived
10// types". These are things like "arrays of x" or "structure of x, y, z" or
11// "function returning x taking (y,z) as parameters", etc...
12//
13// The implementations of these classes live in the Type.cpp file.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_IR_DERIVEDTYPES_H
18#define LLVM_IR_DERIVEDTYPES_H
19
20#include "llvm/ADT/ArrayRef.h"
21#include "llvm/ADT/STLExtras.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/IR/Type.h"
24#include "llvm/Support/Casting.h"
25#include "llvm/Support/Compiler.h"
26#include "llvm/Support/ScalableSize.h"
27#include <cassert>
28#include <cstdint>
29
30namespace llvm {
31
32class Value;
33class APInt;
34class LLVMContext;
35
36/// Class to represent integer types. Note that this class is also used to
37/// represent the built-in integer types: Int1Ty, Int8Ty, Int16Ty, Int32Ty and
38/// Int64Ty.
39/// Integer representation type
40class IntegerType : public Type {
41 friend class LLVMContextImpl;
42
43protected:
44 explicit IntegerType(LLVMContext &C, unsigned NumBits) : Type(C, IntegerTyID){
45 setSubclassData(NumBits);
46 }
47
48public:
49 /// This enum is just used to hold constants we need for IntegerType.
50 enum {
51 MIN_INT_BITS = 1, ///< Minimum number of bits that can be specified
52 MAX_INT_BITS = (1<<24)-1 ///< Maximum number of bits that can be specified
53 ///< Note that bit width is stored in the Type classes SubclassData field
54 ///< which has 24 bits. This yields a maximum bit width of 16,777,215
55 ///< bits.
56 };
57
58 /// This static method is the primary way of constructing an IntegerType.
59 /// If an IntegerType with the same NumBits value was previously instantiated,
60 /// that instance will be returned. Otherwise a new one will be created. Only
61 /// one instance with a given NumBits value is ever created.
62 /// Get or create an IntegerType instance.
63 static IntegerType *get(LLVMContext &C, unsigned NumBits);
64
65 /// Returns type twice as wide the input type.
66 IntegerType *getExtendedType() const {
67 return Type::getIntNTy(getContext(), 2 * getScalarSizeInBits());
68 }
69
70 /// Get the number of bits in this IntegerType
71 unsigned getBitWidth() const { return getSubclassData(); }
72
73 /// Return a bitmask with ones set for all of the bits that can be set by an
74 /// unsigned version of this type. This is 0xFF for i8, 0xFFFF for i16, etc.
75 uint64_t getBitMask() const {
76 return ~uint64_t(0UL) >> (64-getBitWidth());
77 }
78
79 /// Return a uint64_t with just the most significant bit set (the sign bit, if
80 /// the value is treated as a signed number).
81 uint64_t getSignBit() const {
82 return 1ULL << (getBitWidth()-1);
83 }
84
85 /// For example, this is 0xFF for an 8 bit integer, 0xFFFF for i16, etc.
86 /// @returns a bit mask with ones set for all the bits of this type.
87 /// Get a bit mask for this type.
88 APInt getMask() const;
89
90 /// This method determines if the width of this IntegerType is a power-of-2
91 /// in terms of 8 bit bytes.
92 /// @returns true if this is a power-of-2 byte width.
93 /// Is this a power-of-2 byte-width IntegerType ?
94 bool isPowerOf2ByteWidth() const;
95
96 /// Methods for support type inquiry through isa, cast, and dyn_cast.
97 static bool classof(const Type *T) {
98 return T->getTypeID() == IntegerTyID;
99 }
100};
101
102unsigned Type::getIntegerBitWidth() const {
103 return cast<IntegerType>(this)->getBitWidth();
104}
105
106/// Class to represent function types
107///
108class FunctionType : public Type {
109 FunctionType(Type *Result, ArrayRef<Type*> Params, bool IsVarArgs);
110
111public:
112 FunctionType(const FunctionType &) = delete;
113 FunctionType &operator=(const FunctionType &) = delete;
114
115 /// This static method is the primary way of constructing a FunctionType.
116 static FunctionType *get(Type *Result,
117 ArrayRef<Type*> Params, bool isVarArg);
118
119 /// Create a FunctionType taking no parameters.
120 static FunctionType *get(Type *Result, bool isVarArg);
121
122 /// Return true if the specified type is valid as a return type.
123 static bool isValidReturnType(Type *RetTy);
124
125 /// Return true if the specified type is valid as an argument type.
126 static bool isValidArgumentType(Type *ArgTy);
127
128 bool isVarArg() const { return getSubclassData()!=0; }
129 Type *getReturnType() const { return ContainedTys[0]; }
130
131 using param_iterator = Type::subtype_iterator;
132
133 param_iterator param_begin() const { return ContainedTys + 1; }
134 param_iterator param_end() const { return &ContainedTys[NumContainedTys]; }
135 ArrayRef<Type *> params() const {
136 return makeArrayRef(param_begin(), param_end());
137 }
138
139 /// Parameter type accessors.
140 Type *getParamType(unsigned i) const { return ContainedTys[i+1]; }
141
142 /// Return the number of fixed parameters this function type requires.
143 /// This does not consider varargs.
144 unsigned getNumParams() const { return NumContainedTys - 1; }
145
146 /// Methods for support type inquiry through isa, cast, and dyn_cast.
147 static bool classof(const Type *T) {
148 return T->getTypeID() == FunctionTyID;
149 }
150};
151static_assert(alignof(FunctionType) >= alignof(Type *),
152 "Alignment sufficient for objects appended to FunctionType");
153
154bool Type::isFunctionVarArg() const {
155 return cast<FunctionType>(this)->isVarArg();
156}
157
158Type *Type::getFunctionParamType(unsigned i) const {
159 return cast<FunctionType>(this)->getParamType(i);
160}
161
162unsigned Type::getFunctionNumParams() const {
163 return cast<FunctionType>(this)->getNumParams();
164}
165
166/// A handy container for a FunctionType+Callee-pointer pair, which can be
167/// passed around as a single entity. This assists in replacing the use of
168/// PointerType::getElementType() to access the function's type, since that's
169/// slated for removal as part of the [opaque pointer types] project.
170class FunctionCallee {
171public:
172 // Allow implicit conversion from types which have a getFunctionType member
173 // (e.g. Function and InlineAsm).
174 template <typename T, typename U = decltype(&T::getFunctionType)>
175 FunctionCallee(T *Fn)
176 : FnTy(Fn ? Fn->getFunctionType() : nullptr), Callee(Fn) {}
177
178 FunctionCallee(FunctionType *FnTy, Value *Callee)
179 : FnTy(FnTy), Callee(Callee) {
180 assert((FnTy == nullptr) == (Callee == nullptr))(((FnTy == nullptr) == (Callee == nullptr)) ? static_cast<
void> (0) : __assert_fail ("(FnTy == nullptr) == (Callee == nullptr)"
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 180, __PRETTY_FUNCTION__))
;
181 }
182
183 FunctionCallee(std::nullptr_t) {}
184
185 FunctionCallee() = default;
186
187 FunctionType *getFunctionType() { return FnTy; }
188
189 Value *getCallee() { return Callee; }
190
191 explicit operator bool() { return Callee; }
192
193private:
194 FunctionType *FnTy = nullptr;
195 Value *Callee = nullptr;
196};
197
198/// Common super class of ArrayType, StructType and VectorType.
199class CompositeType : public Type {
200protected:
201 explicit CompositeType(LLVMContext &C, TypeID tid) : Type(C, tid) {}
202
203public:
204 /// Given an index value into the type, return the type of the element.
205 Type *getTypeAtIndex(const Value *V) const;
206 Type *getTypeAtIndex(unsigned Idx) const;
207 bool indexValid(const Value *V) const;
208 bool indexValid(unsigned Idx) const;
209
210 /// Methods for support type inquiry through isa, cast, and dyn_cast.
211 static bool classof(const Type *T) {
212 return T->getTypeID() == ArrayTyID ||
213 T->getTypeID() == StructTyID ||
214 T->getTypeID() == VectorTyID;
215 }
216};
217
218/// Class to represent struct types. There are two different kinds of struct
219/// types: Literal structs and Identified structs.
220///
221/// Literal struct types (e.g. { i32, i32 }) are uniqued structurally, and must
222/// always have a body when created. You can get one of these by using one of
223/// the StructType::get() forms.
224///
225/// Identified structs (e.g. %foo or %42) may optionally have a name and are not
226/// uniqued. The names for identified structs are managed at the LLVMContext
227/// level, so there can only be a single identified struct with a given name in
228/// a particular LLVMContext. Identified structs may also optionally be opaque
229/// (have no body specified). You get one of these by using one of the
230/// StructType::create() forms.
231///
232/// Independent of what kind of struct you have, the body of a struct type are
233/// laid out in memory consecutively with the elements directly one after the
234/// other (if the struct is packed) or (if not packed) with padding between the
235/// elements as defined by DataLayout (which is required to match what the code
236/// generator for a target expects).
237///
238class StructType : public CompositeType {
239 StructType(LLVMContext &C) : CompositeType(C, StructTyID) {}
240
241 enum {
242 /// This is the contents of the SubClassData field.
243 SCDB_HasBody = 1,
244 SCDB_Packed = 2,
245 SCDB_IsLiteral = 4,
246 SCDB_IsSized = 8
247 };
248
249 /// For a named struct that actually has a name, this is a pointer to the
250 /// symbol table entry (maintained by LLVMContext) for the struct.
251 /// This is null if the type is an literal struct or if it is a identified
252 /// type that has an empty name.
253 void *SymbolTableEntry = nullptr;
254
255public:
256 StructType(const StructType &) = delete;
257 StructType &operator=(const StructType &) = delete;
258
259 /// This creates an identified struct.
260 static StructType *create(LLVMContext &Context, StringRef Name);
261 static StructType *create(LLVMContext &Context);
262
263 static StructType *create(ArrayRef<Type *> Elements, StringRef Name,
264 bool isPacked = false);
265 static StructType *create(ArrayRef<Type *> Elements);
266 static StructType *create(LLVMContext &Context, ArrayRef<Type *> Elements,
267 StringRef Name, bool isPacked = false);
268 static StructType *create(LLVMContext &Context, ArrayRef<Type *> Elements);
269 template <class... Tys>
270 static typename std::enable_if<are_base_of<Type, Tys...>::value,
271 StructType *>::type
272 create(StringRef Name, Type *elt1, Tys *... elts) {
273 assert(elt1 && "Cannot create a struct type with no elements with this")((elt1 && "Cannot create a struct type with no elements with this"
) ? static_cast<void> (0) : __assert_fail ("elt1 && \"Cannot create a struct type with no elements with this\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 273, __PRETTY_FUNCTION__))
;
274 SmallVector<llvm::Type *, 8> StructFields({elt1, elts...});
275 return create(StructFields, Name);
276 }
277
278 /// This static method is the primary way to create a literal StructType.
279 static StructType *get(LLVMContext &Context, ArrayRef<Type*> Elements,
280 bool isPacked = false);
281
282 /// Create an empty structure type.
283 static StructType *get(LLVMContext &Context, bool isPacked = false);
284
285 /// This static method is a convenience method for creating structure types by
286 /// specifying the elements as arguments. Note that this method always returns
287 /// a non-packed struct, and requires at least one element type.
288 template <class... Tys>
289 static typename std::enable_if<are_base_of<Type, Tys...>::value,
290 StructType *>::type
291 get(Type *elt1, Tys *... elts) {
292 assert(elt1 && "Cannot create a struct type with no elements with this")((elt1 && "Cannot create a struct type with no elements with this"
) ? static_cast<void> (0) : __assert_fail ("elt1 && \"Cannot create a struct type with no elements with this\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 292, __PRETTY_FUNCTION__))
;
293 LLVMContext &Ctx = elt1->getContext();
294 SmallVector<llvm::Type *, 8> StructFields({elt1, elts...});
295 return llvm::StructType::get(Ctx, StructFields);
296 }
297
298 bool isPacked() const { return (getSubclassData() & SCDB_Packed) != 0; }
299
300 /// Return true if this type is uniqued by structural equivalence, false if it
301 /// is a struct definition.
302 bool isLiteral() const { return (getSubclassData() & SCDB_IsLiteral) != 0; }
303
304 /// Return true if this is a type with an identity that has no body specified
305 /// yet. These prints as 'opaque' in .ll files.
306 bool isOpaque() const { return (getSubclassData() & SCDB_HasBody) == 0; }
35
Assuming the condition is true
36
Returning the value 1, which participates in a condition later
307
308 /// isSized - Return true if this is a sized type.
309 bool isSized(SmallPtrSetImpl<Type *> *Visited = nullptr) const;
310
311 /// Return true if this is a named struct that has a non-empty name.
312 bool hasName() const { return SymbolTableEntry != nullptr; }
313
314 /// Return the name for this struct type if it has an identity.
315 /// This may return an empty string for an unnamed struct type. Do not call
316 /// this on an literal type.
317 StringRef getName() const;
318
319 /// Change the name of this type to the specified name, or to a name with a
320 /// suffix if there is a collision. Do not call this on an literal type.
321 void setName(StringRef Name);
322
323 /// Specify a body for an opaque identified type.
324 void setBody(ArrayRef<Type*> Elements, bool isPacked = false);
325
326 template <typename... Tys>
327 typename std::enable_if<are_base_of<Type, Tys...>::value, void>::type
328 setBody(Type *elt1, Tys *... elts) {
329 assert(elt1 && "Cannot create a struct type with no elements with this")((elt1 && "Cannot create a struct type with no elements with this"
) ? static_cast<void> (0) : __assert_fail ("elt1 && \"Cannot create a struct type with no elements with this\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 329, __PRETTY_FUNCTION__))
;
330 SmallVector<llvm::Type *, 8> StructFields({elt1, elts...});
331 setBody(StructFields);
332 }
333
334 /// Return true if the specified type is valid as a element type.
335 static bool isValidElementType(Type *ElemTy);
336
337 // Iterator access to the elements.
338 using element_iterator = Type::subtype_iterator;
339
340 element_iterator element_begin() const { return ContainedTys; }
341 element_iterator element_end() const { return &ContainedTys[NumContainedTys];}
342 ArrayRef<Type *> const elements() const {
343 return makeArrayRef(element_begin(), element_end());
344 }
345
346 /// Return true if this is layout identical to the specified struct.
347 bool isLayoutIdentical(StructType *Other) const;
348
349 /// Random access to the elements
350 unsigned getNumElements() const { return NumContainedTys; }
351 Type *getElementType(unsigned N) const {
352 assert(N < NumContainedTys && "Element number out of range!")((N < NumContainedTys && "Element number out of range!"
) ? static_cast<void> (0) : __assert_fail ("N < NumContainedTys && \"Element number out of range!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 352, __PRETTY_FUNCTION__))
;
353 return ContainedTys[N];
354 }
355
356 /// Methods for support type inquiry through isa, cast, and dyn_cast.
357 static bool classof(const Type *T) {
358 return T->getTypeID() == StructTyID;
359 }
360};
361
362StringRef Type::getStructName() const {
363 return cast<StructType>(this)->getName();
364}
365
366unsigned Type::getStructNumElements() const {
367 return cast<StructType>(this)->getNumElements();
368}
369
370Type *Type::getStructElementType(unsigned N) const {
371 return cast<StructType>(this)->getElementType(N);
372}
373
374/// This is the superclass of the array and vector type classes. Both of these
375/// represent "arrays" in memory. The array type represents a specifically sized
376/// array, and the vector type represents a specifically sized array that allows
377/// for use of SIMD instructions. SequentialType holds the common features of
378/// both, which stem from the fact that both lay their components out in memory
379/// identically.
380class SequentialType : public CompositeType {
381 Type *ContainedType; ///< Storage for the single contained type.
382 uint64_t NumElements;
383
384protected:
385 SequentialType(TypeID TID, Type *ElType, uint64_t NumElements)
386 : CompositeType(ElType->getContext(), TID), ContainedType(ElType),
387 NumElements(NumElements) {
388 ContainedTys = &ContainedType;
389 NumContainedTys = 1;
390 }
391
392public:
393 SequentialType(const SequentialType &) = delete;
394 SequentialType &operator=(const SequentialType &) = delete;
395
396 /// For scalable vectors, this will return the minimum number of elements
397 /// in the vector.
398 uint64_t getNumElements() const { return NumElements; }
399 Type *getElementType() const { return ContainedType; }
400
401 /// Methods for support type inquiry through isa, cast, and dyn_cast.
402 static bool classof(const Type *T) {
403 return T->getTypeID() == ArrayTyID || T->getTypeID() == VectorTyID;
404 }
405};
406
407/// Class to represent array types.
408class ArrayType : public SequentialType {
409 ArrayType(Type *ElType, uint64_t NumEl);
410
411public:
412 ArrayType(const ArrayType &) = delete;
413 ArrayType &operator=(const ArrayType &) = delete;
414
415 /// This static method is the primary way to construct an ArrayType
416 static ArrayType *get(Type *ElementType, uint64_t NumElements);
417
418 /// Return true if the specified type is valid as a element type.
419 static bool isValidElementType(Type *ElemTy);
420
421 /// Methods for support type inquiry through isa, cast, and dyn_cast.
422 static bool classof(const Type *T) {
423 return T->getTypeID() == ArrayTyID;
424 }
425};
426
427uint64_t Type::getArrayNumElements() const {
428 return cast<ArrayType>(this)->getNumElements();
429}
430
431/// Class to represent vector types.
432class VectorType : public SequentialType {
433 /// A fully specified VectorType is of the form <vscale x n x Ty>. 'n' is the
434 /// minimum number of elements of type Ty contained within the vector, and
435 /// 'vscale x' indicates that the total element count is an integer multiple
436 /// of 'n', where the multiple is either guaranteed to be one, or is
437 /// statically unknown at compile time.
438 ///
439 /// If the multiple is known to be 1, then the extra term is discarded in
440 /// textual IR:
441 ///
442 /// <4 x i32> - a vector containing 4 i32s
443 /// <vscale x 4 x i32> - a vector containing an unknown integer multiple
444 /// of 4 i32s
445
446 VectorType(Type *ElType, unsigned NumEl, bool Scalable = false);
447 VectorType(Type *ElType, ElementCount EC);
448
449 // If true, the total number of elements is an unknown multiple of the
450 // minimum 'NumElements' from SequentialType. Otherwise the total number
451 // of elements is exactly equal to 'NumElements'.
452 bool Scalable;
453
454public:
455 VectorType(const VectorType &) = delete;
456 VectorType &operator=(const VectorType &) = delete;
457
458 /// This static method is the primary way to construct an VectorType.
459 static VectorType *get(Type *ElementType, ElementCount EC);
460 static VectorType *get(Type *ElementType, unsigned NumElements,
461 bool Scalable = false) {
462 return VectorType::get(ElementType, {NumElements, Scalable});
463 }
464
465 /// This static method gets a VectorType with the same number of elements as
466 /// the input type, and the element type is an integer type of the same width
467 /// as the input element type.
468 static VectorType *getInteger(VectorType *VTy) {
469 unsigned EltBits = VTy->getElementType()->getPrimitiveSizeInBits();
470 assert(EltBits && "Element size must be of a non-zero size")((EltBits && "Element size must be of a non-zero size"
) ? static_cast<void> (0) : __assert_fail ("EltBits && \"Element size must be of a non-zero size\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 470, __PRETTY_FUNCTION__))
;
471 Type *EltTy = IntegerType::get(VTy->getContext(), EltBits);
472 return VectorType::get(EltTy, VTy->getElementCount());
473 }
474
475 /// This static method is like getInteger except that the element types are
476 /// twice as wide as the elements in the input type.
477 static VectorType *getExtendedElementVectorType(VectorType *VTy) {
478 assert(VTy->isIntOrIntVectorTy() && "VTy expected to be a vector of ints.")((VTy->isIntOrIntVectorTy() && "VTy expected to be a vector of ints."
) ? static_cast<void> (0) : __assert_fail ("VTy->isIntOrIntVectorTy() && \"VTy expected to be a vector of ints.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 478, __PRETTY_FUNCTION__))
;
479 auto *EltTy = cast<IntegerType>(VTy->getElementType());
480 return VectorType::get(EltTy->getExtendedType(), VTy->getElementCount());
481 }
482
483 // This static method gets a VectorType with the same number of elements as
484 // the input type, and the element type is an integer or float type which
485 // is half as wide as the elements in the input type.
486 static VectorType *getTruncatedElementVectorType(VectorType *VTy) {
487 Type *EltTy;
488 if (VTy->getElementType()->isFloatingPointTy()) {
489 switch(VTy->getElementType()->getTypeID()) {
490 case DoubleTyID:
491 EltTy = Type::getFloatTy(VTy->getContext());
492 break;
493 case FloatTyID:
494 EltTy = Type::getHalfTy(VTy->getContext());
495 break;
496 default:
497 llvm_unreachable("Cannot create narrower fp vector element type")::llvm::llvm_unreachable_internal("Cannot create narrower fp vector element type"
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 497)
;
498 }
499 } else {
500 unsigned EltBits = VTy->getElementType()->getPrimitiveSizeInBits();
501 assert((EltBits & 1) == 0 &&(((EltBits & 1) == 0 && "Cannot truncate vector element with odd bit-width"
) ? static_cast<void> (0) : __assert_fail ("(EltBits & 1) == 0 && \"Cannot truncate vector element with odd bit-width\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 502, __PRETTY_FUNCTION__))
502 "Cannot truncate vector element with odd bit-width")(((EltBits & 1) == 0 && "Cannot truncate vector element with odd bit-width"
) ? static_cast<void> (0) : __assert_fail ("(EltBits & 1) == 0 && \"Cannot truncate vector element with odd bit-width\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 502, __PRETTY_FUNCTION__))
;
503 EltTy = IntegerType::get(VTy->getContext(), EltBits / 2);
504 }
505 return VectorType::get(EltTy, VTy->getElementCount());
506 }
507
508 // This static method returns a VectorType with a smaller number of elements
509 // of a larger type than the input element type. For example, a <16 x i8>
510 // subdivided twice would return <4 x i32>
511 static VectorType *getSubdividedVectorType(VectorType *VTy, int NumSubdivs) {
512 for (int i = 0; i < NumSubdivs; ++i) {
513 VTy = VectorType::getDoubleElementsVectorType(VTy);
514 VTy = VectorType::getTruncatedElementVectorType(VTy);
515 }
516 return VTy;
517 }
518
519 /// This static method returns a VectorType with half as many elements as the
520 /// input type and the same element type.
521 static VectorType *getHalfElementsVectorType(VectorType *VTy) {
522 auto EltCnt = VTy->getElementCount();
523 assert ((EltCnt.Min & 1) == 0 &&(((EltCnt.Min & 1) == 0 && "Cannot halve vector with odd number of elements."
) ? static_cast<void> (0) : __assert_fail ("(EltCnt.Min & 1) == 0 && \"Cannot halve vector with odd number of elements.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 524, __PRETTY_FUNCTION__))
524 "Cannot halve vector with odd number of elements.")(((EltCnt.Min & 1) == 0 && "Cannot halve vector with odd number of elements."
) ? static_cast<void> (0) : __assert_fail ("(EltCnt.Min & 1) == 0 && \"Cannot halve vector with odd number of elements.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 524, __PRETTY_FUNCTION__))
;
525 return VectorType::get(VTy->getElementType(), EltCnt/2);
526 }
527
528 /// This static method returns a VectorType with twice as many elements as the
529 /// input type and the same element type.
530 static VectorType *getDoubleElementsVectorType(VectorType *VTy) {
531 auto EltCnt = VTy->getElementCount();
532 assert((VTy->getNumElements() * 2ull) <= UINT_MAX &&(((VTy->getNumElements() * 2ull) <= (2147483647 *2U +1U
) && "Too many elements in vector") ? static_cast<
void> (0) : __assert_fail ("(VTy->getNumElements() * 2ull) <= UINT_MAX && \"Too many elements in vector\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 533, __PRETTY_FUNCTION__))
533 "Too many elements in vector")(((VTy->getNumElements() * 2ull) <= (2147483647 *2U +1U
) && "Too many elements in vector") ? static_cast<
void> (0) : __assert_fail ("(VTy->getNumElements() * 2ull) <= UINT_MAX && \"Too many elements in vector\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 533, __PRETTY_FUNCTION__))
;
534 return VectorType::get(VTy->getElementType(), EltCnt*2);
535 }
536
537 /// Return true if the specified type is valid as a element type.
538 static bool isValidElementType(Type *ElemTy);
539
540 /// Return an ElementCount instance to represent the (possibly scalable)
541 /// number of elements in the vector.
542 ElementCount getElementCount() const {
543 uint64_t MinimumEltCnt = getNumElements();
544 assert(MinimumEltCnt <= UINT_MAX && "Too many elements in vector")((MinimumEltCnt <= (2147483647 *2U +1U) && "Too many elements in vector"
) ? static_cast<void> (0) : __assert_fail ("MinimumEltCnt <= UINT_MAX && \"Too many elements in vector\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 544, __PRETTY_FUNCTION__))
;
545 return { (unsigned)MinimumEltCnt, Scalable };
546 }
547
548 /// Returns whether or not this is a scalable vector (meaning the total
549 /// element count is a multiple of the minimum).
550 bool isScalable() const {
551 return Scalable;
552 }
553
554 /// Return the minimum number of bits in the Vector type.
555 /// Returns zero when the vector is a vector of pointers.
556 unsigned getBitWidth() const {
557 return getNumElements() * getElementType()->getPrimitiveSizeInBits();
558 }
559
560 /// Methods for support type inquiry through isa, cast, and dyn_cast.
561 static bool classof(const Type *T) {
562 return T->getTypeID() == VectorTyID;
563 }
564};
565
566unsigned Type::getVectorNumElements() const {
567 return cast<VectorType>(this)->getNumElements();
568}
569
570bool Type::getVectorIsScalable() const {
571 return cast<VectorType>(this)->isScalable();
572}
573
574/// Class to represent pointers.
575class PointerType : public Type {
576 explicit PointerType(Type *ElType, unsigned AddrSpace);
577
578 Type *PointeeTy;
579
580public:
581 PointerType(const PointerType &) = delete;
582 PointerType &operator=(const PointerType &) = delete;
583
584 /// This constructs a pointer to an object of the specified type in a numbered
585 /// address space.
586 static PointerType *get(Type *ElementType, unsigned AddressSpace);
587
588 /// This constructs a pointer to an object of the specified type in the
589 /// generic address space (address space zero).
590 static PointerType *getUnqual(Type *ElementType) {
591 return PointerType::get(ElementType, 0);
592 }
593
594 Type *getElementType() const { return PointeeTy; }
595
596 /// Return true if the specified type is valid as a element type.
597 static bool isValidElementType(Type *ElemTy);
598
599 /// Return true if we can load or store from a pointer to this type.
600 static bool isLoadableOrStorableType(Type *ElemTy);
601
602 /// Return the address space of the Pointer type.
603 inline unsigned getAddressSpace() const { return getSubclassData(); }
604
605 /// Implement support type inquiry through isa, cast, and dyn_cast.
606 static bool classof(const Type *T) {
607 return T->getTypeID() == PointerTyID;
608 }
609};
610
611Type *Type::getExtendedType() const {
612 assert(((isIntOrIntVectorTy() && "Original type expected to be a vector of integers or a scalar integer."
) ? static_cast<void> (0) : __assert_fail ("isIntOrIntVectorTy() && \"Original type expected to be a vector of integers or a scalar integer.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 614, __PRETTY_FUNCTION__))
613 isIntOrIntVectorTy() &&((isIntOrIntVectorTy() && "Original type expected to be a vector of integers or a scalar integer."
) ? static_cast<void> (0) : __assert_fail ("isIntOrIntVectorTy() && \"Original type expected to be a vector of integers or a scalar integer.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 614, __PRETTY_FUNCTION__))
614 "Original type expected to be a vector of integers or a scalar integer.")((isIntOrIntVectorTy() && "Original type expected to be a vector of integers or a scalar integer."
) ? static_cast<void> (0) : __assert_fail ("isIntOrIntVectorTy() && \"Original type expected to be a vector of integers or a scalar integer.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/IR/DerivedTypes.h"
, 614, __PRETTY_FUNCTION__))
;
615 if (auto *VTy = dyn_cast<VectorType>(this))
616 return VectorType::getExtendedElementVectorType(
617 const_cast<VectorType *>(VTy));
618 return cast<IntegerType>(this)->getExtendedType();
619}
620
621unsigned Type::getPointerAddressSpace() const {
622 return cast<PointerType>(getScalarType())->getAddressSpace();
623}
624
625} // end namespace llvm
626
627#endif // LLVM_IR_DERIVEDTYPES_H