llvm-project/clang/lib/Serialization/ASTCommon.cpp

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//===--- ASTCommon.cpp - Common stuff for ASTReader/ASTWriter----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines common functions that both ASTReader and ASTWriter use.
//
//===----------------------------------------------------------------------===//
#include "ASTCommon.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Serialization/ASTDeserializationListener.h"
#include "llvm/ADT/StringExtras.h"
using namespace clang;
// Give ASTDeserializationListener's VTable a home.
ASTDeserializationListener::~ASTDeserializationListener() { }
serialization::TypeIdx
serialization::TypeIdxFromBuiltin(const BuiltinType *BT) {
unsigned ID = 0;
switch (BT->getKind()) {
case BuiltinType::Void:
ID = PREDEF_TYPE_VOID_ID;
break;
case BuiltinType::Bool:
ID = PREDEF_TYPE_BOOL_ID;
break;
case BuiltinType::Char_U:
ID = PREDEF_TYPE_CHAR_U_ID;
break;
case BuiltinType::UChar:
ID = PREDEF_TYPE_UCHAR_ID;
break;
case BuiltinType::UShort:
ID = PREDEF_TYPE_USHORT_ID;
break;
case BuiltinType::UInt:
ID = PREDEF_TYPE_UINT_ID;
break;
case BuiltinType::ULong:
ID = PREDEF_TYPE_ULONG_ID;
break;
case BuiltinType::ULongLong:
ID = PREDEF_TYPE_ULONGLONG_ID;
break;
case BuiltinType::UInt128:
ID = PREDEF_TYPE_UINT128_ID;
break;
case BuiltinType::Char_S:
ID = PREDEF_TYPE_CHAR_S_ID;
break;
case BuiltinType::SChar:
ID = PREDEF_TYPE_SCHAR_ID;
break;
case BuiltinType::WChar_S:
case BuiltinType::WChar_U:
ID = PREDEF_TYPE_WCHAR_ID;
break;
case BuiltinType::Short:
ID = PREDEF_TYPE_SHORT_ID;
break;
case BuiltinType::Int:
ID = PREDEF_TYPE_INT_ID;
break;
case BuiltinType::Long:
ID = PREDEF_TYPE_LONG_ID;
break;
case BuiltinType::LongLong:
ID = PREDEF_TYPE_LONGLONG_ID;
break;
case BuiltinType::Int128:
ID = PREDEF_TYPE_INT128_ID;
break;
case BuiltinType::Half:
ID = PREDEF_TYPE_HALF_ID;
break;
case BuiltinType::Float:
ID = PREDEF_TYPE_FLOAT_ID;
break;
case BuiltinType::Double:
ID = PREDEF_TYPE_DOUBLE_ID;
break;
case BuiltinType::LongDouble:
ID = PREDEF_TYPE_LONGDOUBLE_ID;
break;
case BuiltinType::Float128:
ID = PREDEF_TYPE_FLOAT128_ID;
break;
case BuiltinType::NullPtr:
ID = PREDEF_TYPE_NULLPTR_ID;
break;
case BuiltinType::Char16:
ID = PREDEF_TYPE_CHAR16_ID;
break;
case BuiltinType::Char32:
ID = PREDEF_TYPE_CHAR32_ID;
break;
case BuiltinType::Overload:
ID = PREDEF_TYPE_OVERLOAD_ID;
break;
case BuiltinType::BoundMember:
ID = PREDEF_TYPE_BOUND_MEMBER;
break;
case BuiltinType::PseudoObject:
ID = PREDEF_TYPE_PSEUDO_OBJECT;
break;
case BuiltinType::Dependent:
ID = PREDEF_TYPE_DEPENDENT_ID;
break;
case BuiltinType::UnknownAny:
ID = PREDEF_TYPE_UNKNOWN_ANY;
break;
case BuiltinType::ARCUnbridgedCast:
ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST;
break;
case BuiltinType::ObjCId:
ID = PREDEF_TYPE_OBJC_ID;
break;
case BuiltinType::ObjCClass:
ID = PREDEF_TYPE_OBJC_CLASS;
break;
case BuiltinType::ObjCSel:
ID = PREDEF_TYPE_OBJC_SEL;
break;
[OpenCL] Complete image types support. I. Current implementation of images is not conformant to spec in the following points: 1. It makes no distinction with respect to access qualifiers and therefore allows to use images with different access type interchangeably. The following code would compile just fine: void write_image(write_only image2d_t img); kernel void foo(read_only image2d_t img) { write_image(img); } // Accepted code which is disallowed according to s6.13.14. 2. It discards access qualifier on generated code, which leads to generated code for the above example: call void @write_image(%opencl.image2d_t* %img); In OpenCL2.0 however we can have different calls into write_image with read_only and wite_only images. Also generally following compiler steps have no easy way to take different path depending on the image access: linking to the right implementation of image types, performing IR opts and backend codegen differently. 3. Image types are language keywords and can't be redeclared s6.1.9, which can happen currently as they are just typedef names. 4. Default access qualifier read_only is to be added if not provided explicitly. II. This patch corrects the above points as follows: 1. All images are encapsulated into a separate .def file that is inserted in different points where image handling is required. This avoid a lot of code repetition as all images are handled the same way in the code with no distinction of their exact type. 2. The Cartesian product of image types and image access qualifiers is added to the builtin types. This simplifies a lot handling of access type mismatch as no operations are allowed by default on distinct Builtin types. Also spec intended access qualifier as special type qualifier that are combined with an image type to form a distinct type (see statement above - images can't be created w/o access qualifiers). 3. Improves testing of images in Clang. Author: Anastasia Stulova Reviewers: bader, mgrang. Subscribers: pxli168, pekka.jaaskelainen, yaxunl. Differential Revision: http://reviews.llvm.org/D17821 llvm-svn: 265783
2016-04-08 21:40:33 +08:00
#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
case BuiltinType::Id: \
ID = PREDEF_TYPE_##Id##_ID; \
break;
#include "clang/Basic/OpenCLImageTypes.def"
case BuiltinType::OCLSampler:
ID = PREDEF_TYPE_SAMPLER_ID;
break;
case BuiltinType::OCLEvent:
ID = PREDEF_TYPE_EVENT_ID;
break;
case BuiltinType::OCLClkEvent:
ID = PREDEF_TYPE_CLK_EVENT_ID;
break;
case BuiltinType::OCLQueue:
ID = PREDEF_TYPE_QUEUE_ID;
break;
case BuiltinType::OCLNDRange:
ID = PREDEF_TYPE_NDRANGE_ID;
break;
case BuiltinType::OCLReserveID:
ID = PREDEF_TYPE_RESERVE_ID_ID;
break;
case BuiltinType::BuiltinFn:
ID = PREDEF_TYPE_BUILTIN_FN;
break;
case BuiltinType::OMPArraySection:
ID = PREDEF_TYPE_OMP_ARRAY_SECTION;
break;
}
return TypeIdx(ID);
}
unsigned serialization::ComputeHash(Selector Sel) {
unsigned N = Sel.getNumArgs();
if (N == 0)
++N;
unsigned R = 5381;
for (unsigned I = 0; I != N; ++I)
if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
R = llvm::HashString(II->getName(), R);
return R;
}
const DeclContext *
serialization::getDefinitiveDeclContext(const DeclContext *DC) {
switch (DC->getDeclKind()) {
// These entities may have multiple definitions.
case Decl::TranslationUnit:
case Decl::ExternCContext:
case Decl::Namespace:
case Decl::LinkageSpec:
case Decl::Export:
return nullptr;
// C/C++ tag types can only be defined in one place.
case Decl::Enum:
case Decl::Record:
if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition())
return Def;
return nullptr;
// FIXME: These can be defined in one place... except special member
// functions and out-of-line definitions.
case Decl::CXXRecord:
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
return nullptr;
// Each function, method, and block declaration is its own DeclContext.
case Decl::Function:
case Decl::CXXMethod:
case Decl::CXXConstructor:
case Decl::CXXDestructor:
case Decl::CXXConversion:
case Decl::ObjCMethod:
case Decl::Block:
case Decl::Captured:
// Objective C categories, category implementations, and class
// implementations can only be defined in one place.
case Decl::ObjCCategory:
case Decl::ObjCCategoryImpl:
case Decl::ObjCImplementation:
return DC;
case Decl::ObjCProtocol:
if (const ObjCProtocolDecl *Def
= cast<ObjCProtocolDecl>(DC)->getDefinition())
return Def;
return nullptr;
// FIXME: These are defined in one place, but properties in class extensions
// end up being back-patched into the main interface. See
// Sema::HandlePropertyInClassExtension for the offending code.
case Decl::ObjCInterface:
return nullptr;
default:
llvm_unreachable("Unhandled DeclContext in AST reader");
}
llvm_unreachable("Unhandled decl kind");
}
bool serialization::isRedeclarableDeclKind(unsigned Kind) {
switch (static_cast<Decl::Kind>(Kind)) {
case Decl::TranslationUnit:
case Decl::ExternCContext:
// Special case of a "merged" declaration.
return true;
case Decl::Namespace:
case Decl::NamespaceAlias:
case Decl::Typedef:
case Decl::TypeAlias:
case Decl::Enum:
case Decl::Record:
case Decl::CXXRecord:
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
case Decl::VarTemplateSpecialization:
case Decl::VarTemplatePartialSpecialization:
case Decl::Function:
case Decl::CXXMethod:
case Decl::CXXConstructor:
case Decl::CXXDestructor:
case Decl::CXXConversion:
case Decl::UsingShadow:
P0136R1, DR1573, DR1645, DR1715, DR1736, DR1903, DR1941, DR1959, DR1991: Replace inheriting constructors implementation with new approach, voted into C++ last year as a DR against C++11. Instead of synthesizing a set of derived class constructors for each inherited base class constructor, we make the constructors of the base class visible to constructor lookup in the derived class, using the normal rules for using-declarations. For constructors, UsingShadowDecl now has a ConstructorUsingShadowDecl derived class that tracks the requisite additional information. We create shadow constructors (not found by name lookup) in the derived class to model the actual initialization, and have a new expression node, CXXInheritedCtorInitExpr, to model the initialization of a base class from such a constructor. (This initialization is special because it performs real perfect forwarding of arguments.) In cases where argument forwarding is not possible (for inalloca calls, variadic calls, and calls with callee parameter cleanup), the shadow inheriting constructor is not emitted and instead we directly emit the initialization code into the caller of the inherited constructor. Note that this new model is not perfectly compatible with the old model in some corner cases. In particular: * if B inherits a private constructor from A, and C uses that constructor to construct a B, then we previously required that A befriends B and B befriends C, but the new rules require A to befriend C directly, and * if a derived class has its own constructors (and so its implicit default constructor is suppressed), it may still inherit a default constructor from a base class llvm-svn: 274049
2016-06-29 03:03:57 +08:00
case Decl::ConstructorUsingShadow:
case Decl::Var:
case Decl::FunctionTemplate:
case Decl::ClassTemplate:
case Decl::VarTemplate:
case Decl::TypeAliasTemplate:
case Decl::ObjCProtocol:
case Decl::ObjCInterface:
case Decl::Empty:
return true;
// Never redeclarable.
case Decl::UsingDirective:
case Decl::Label:
case Decl::UnresolvedUsingTypename:
case Decl::TemplateTypeParm:
case Decl::EnumConstant:
case Decl::UnresolvedUsingValue:
case Decl::IndirectField:
case Decl::Field:
case Decl::MSProperty:
case Decl::ObjCIvar:
case Decl::ObjCAtDefsField:
case Decl::NonTypeTemplateParm:
case Decl::TemplateTemplateParm:
case Decl::Using:
case Decl::UsingPack:
case Decl::ObjCMethod:
case Decl::ObjCCategory:
case Decl::ObjCCategoryImpl:
case Decl::ObjCImplementation:
case Decl::ObjCProperty:
case Decl::ObjCCompatibleAlias:
case Decl::LinkageSpec:
case Decl::Export:
case Decl::ObjCPropertyImpl:
case Decl::PragmaComment:
case Decl::PragmaDetectMismatch:
case Decl::FileScopeAsm:
case Decl::AccessSpec:
case Decl::Friend:
case Decl::FriendTemplate:
case Decl::StaticAssert:
case Decl::Block:
case Decl::Captured:
case Decl::ClassScopeFunctionSpecialization:
case Decl::Import:
case Decl::OMPThreadPrivate:
case Decl::OMPCapturedExpr:
case Decl::OMPDeclareReduction:
case Decl::BuiltinTemplate:
case Decl::Decomposition:
case Decl::Binding:
return false;
// These indirectly derive from Redeclarable<T> but are not actually
// redeclarable.
case Decl::ImplicitParam:
case Decl::ParmVar:
case Decl::ObjCTypeParam:
return false;
}
llvm_unreachable("Unhandled declaration kind");
}
bool serialization::needsAnonymousDeclarationNumber(const NamedDecl *D) {
// Friend declarations in dependent contexts aren't anonymous in the usual
// sense, but they cannot be found by name lookup in their semantic context
// (or indeed in any context), so we treat them as anonymous.
//
// This doesn't apply to friend tag decls; Sema makes those available to name
// lookup in the surrounding context.
if (D->getFriendObjectKind() &&
D->getLexicalDeclContext()->isDependentContext() && !isa<TagDecl>(D)) {
// For function templates and class templates, the template is numbered and
// not its pattern.
if (auto *FD = dyn_cast<FunctionDecl>(D))
return !FD->getDescribedFunctionTemplate();
if (auto *RD = dyn_cast<CXXRecordDecl>(D))
return !RD->getDescribedClassTemplate();
return true;
}
// Otherwise, we only care about anonymous class members.
if (D->getDeclName() || !isa<CXXRecordDecl>(D->getLexicalDeclContext()))
return false;
return isa<TagDecl>(D) || isa<FieldDecl>(D);
}