================
@@ -189,4 +189,152 @@ unsigned extractPBaseFlags(const ASTContext &Ctx,
QualType &Type) {
return Flags;
}
+/// Given a builtin type, returns whether the type info for that type is
+/// defined in the standard library.
+static bool typeInfoIsInStandardLibrary(const BuiltinType *Ty) {
+ // Itanium C++ ABI 2.9.2:
+ // Basic type information (e.g. for "int", "bool", etc.) will be kept in
+ // the run-time support library. Specifically, the run-time support
+ // library should contain type_info objects for the types X, X* and
+ // X const*, for every X in: void, std::nullptr_t, bool, wchar_t, char,
+ // unsigned char, signed char, short, unsigned short, int, unsigned int,
+ // long, unsigned long, long long, unsigned long long, float, double,
+ // long double, char16_t, char32_t, and the IEEE 754r decimal and
+ // half-precision floating point types.
+ //
+ // GCC also emits RTTI for __int128.
+ // FIXME: We do not emit RTTI information for decimal types here.
+
+ // Types added here must also be added to EmitFundamentalRTTIDescriptors in
+ // clang/lib/CodeGen/ItaniumCXXABI.cpp.
+ switch (Ty->getKind()) {
+ case BuiltinType::Void:
+ case BuiltinType::NullPtr:
+ case BuiltinType::Bool:
+ case BuiltinType::WChar_S:
+ case BuiltinType::WChar_U:
+ case BuiltinType::Char_U:
+ case BuiltinType::Char_S:
+ case BuiltinType::UChar:
+ case BuiltinType::SChar:
+ case BuiltinType::Short:
+ case BuiltinType::UShort:
+ case BuiltinType::Int:
+ case BuiltinType::UInt:
+ case BuiltinType::Long:
+ case BuiltinType::ULong:
+ case BuiltinType::LongLong:
+ case BuiltinType::ULongLong:
+ case BuiltinType::Half:
+ case BuiltinType::Float:
+ case BuiltinType::Double:
+ case BuiltinType::LongDouble:
+ case BuiltinType::Float16:
+ case BuiltinType::Float128:
+ case BuiltinType::Ibm128:
+ case BuiltinType::Char8:
+ case BuiltinType::Char16:
+ case BuiltinType::Char32:
+ case BuiltinType::Int128:
+ case BuiltinType::UInt128:
+ return true;
+
+#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix)
\
+ case BuiltinType::Id:
+#include "clang/Basic/OpenCLImageTypes.def"
+#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) case BuiltinType::Id:
+#include "clang/Basic/OpenCLExtensionTypes.def"
+ case BuiltinType::OCLSampler:
+ case BuiltinType::OCLEvent:
+ case BuiltinType::OCLClkEvent:
+ case BuiltinType::OCLQueue:
+ case BuiltinType::OCLReserveID:
+#define SVE_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
+#include "clang/Basic/AArch64ACLETypes.def"
+#define PPC_VECTOR_TYPE(Name, Id, Size) case BuiltinType::Id:
+#include "clang/Basic/PPCTypes.def"
+#define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
+#include "clang/Basic/RISCVVTypes.def"
+#define WASM_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
+#include "clang/Basic/WebAssemblyReferenceTypes.def"
+#define AMDGPU_TYPE(Name, Id, SingletonId, Width, Align) case BuiltinType::Id:
+#include "clang/Basic/AMDGPUTypes.def"
+#define HLSL_INTANGIBLE_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
+#include "clang/Basic/HLSLIntangibleTypes.def"
+#define HLSL_PACKED_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
+#include "clang/Basic/HLSLPackedTypes.def"
+#define SPIRV_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
+#include "clang/Basic/SPIRVTypes.def"
+ case BuiltinType::ShortAccum:
+ case BuiltinType::Accum:
+ case BuiltinType::LongAccum:
+ case BuiltinType::UShortAccum:
+ case BuiltinType::UAccum:
+ case BuiltinType::ULongAccum:
+ case BuiltinType::ShortFract:
+ case BuiltinType::Fract:
+ case BuiltinType::LongFract:
+ case BuiltinType::UShortFract:
+ case BuiltinType::UFract:
+ case BuiltinType::ULongFract:
+ case BuiltinType::SatShortAccum:
+ case BuiltinType::SatAccum:
+ case BuiltinType::SatLongAccum:
+ case BuiltinType::SatUShortAccum:
+ case BuiltinType::SatUAccum:
+ case BuiltinType::SatULongAccum:
+ case BuiltinType::SatShortFract:
+ case BuiltinType::SatFract:
+ case BuiltinType::SatLongFract:
+ case BuiltinType::SatUShortFract:
+ case BuiltinType::SatUFract:
+ case BuiltinType::SatULongFract:
+ case BuiltinType::BFloat16:
+ case BuiltinType::MetaInfo:
+ return false;
+
+ case BuiltinType::Dependent:
+#define BUILTIN_TYPE(Id, SingletonId)
+#define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
+ llvm_unreachable("asking for RRTI for a placeholder type!");
+
+ case BuiltinType::ObjCId:
+ case BuiltinType::ObjCClass:
+ case BuiltinType::ObjCSel:
+ llvm_unreachable("FIXME: Objective-C types are unsupported!");
+ }
+
+ llvm_unreachable("Invalid BuiltinType Kind!");
+}
+
+static bool typeInfoIsInStandardLibrary(const PointerType *PointerTy) {
+ QualType PointeeTy = PointerTy->getPointeeType();
+ const BuiltinType *BuiltinTy = dyn_cast<BuiltinType>(PointeeTy);
+ if (!BuiltinTy)
+ return false;
+
+ // Check the qualifiers.
+ Qualifiers Quals = PointeeTy.getQualifiers();
+ Quals.removeConst();
+
+ if (!Quals.empty())
+ return false;
+
+ return typeInfoIsInStandardLibrary(BuiltinTy);
+}
+
+bool isStandardLibraryRTTIDescriptor(QualType Ty) {
----------------
xlauko wrote:
This mirrored, how it was done in the codegen and I was not aiming to do
refactors beyond code motion in this deduplication. Also it’s an Itanium-ABI
fact rather than a property of the type, as it has to stay in sync with
`EmitFundamentalRTTIDescriptors`. It ha few assumptions, e.g., it is a
canonical type and is unreachable for placeholder/ObjC builtins, so it doesn’t
work well as a general `QualType` query?
https://github.com/llvm/llvm-project/pull/223423
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