================
@@ -0,0 +1,556 @@
+//==---- QualTypeMapper.cpp - Maps Clang QualType to LLVMABI Types
---------==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Maps Clang QualType instances to corresponding LLVM ABI type
+/// representations. This mapper translates high-level type information from
the
+/// AST into low-level ABI-specific types that encode size, alignment, and
+/// layout details required for code generation and cross-language
+/// interoperability.
+///
+//===----------------------------------------------------------------------===//
+#include "clang/CodeGen/QualTypeMapper.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTFwd.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/RecordLayout.h"
+#include "clang/AST/Type.h"
+#include "clang/Basic/AddressSpaces.h"
+#include "clang/Basic/LLVM.h"
+#include "clang/Basic/TargetInfo.h"
+#include "llvm/ABI/Types.h"
+#include "llvm/Support/Alignment.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TypeSize.h"
+#include <cstdint>
+
+namespace clang {
+namespace CodeGen {
+
+/// Main entry point for converting Clang QualType to LLVM ABI Type.
+/// This method performs type canonicalization, caching, and dispatches
+/// to specialized conversion methods based on the type kind.
+///
+/// \param QT The Clang QualType to convert
+/// \return Corresponding LLVM ABI Type representation, or nullptr on error
+const llvm::abi::Type *QualTypeMapper::convertType(QualType QT) {
+ // Canonicalize type and strip qualifiers
+ // This ensures consistent type representation across different contexts
+ QT = QT.getCanonicalType().getUnqualifiedType();
+
+ // Results are cached since type conversion may be expensive
+ auto It = TypeCache.find(QT);
+ if (It != TypeCache.end())
+ return It->second;
+
+ const llvm::abi::Type *Result = nullptr;
+ if (const auto *BT = dyn_cast<BuiltinType>(QT.getTypePtr()))
+ Result = convertBuiltinType(BT);
+ else if (const auto *PT = dyn_cast<PointerType>(QT.getTypePtr()))
+ Result = convertPointerType(PT);
+ else if (const auto *RT = dyn_cast<ReferenceType>(QT.getTypePtr()))
+ Result = convertReferenceType(RT);
+ else if (const auto *AT = dyn_cast<ArrayType>(QT.getTypePtr()))
+ Result = convertArrayType(AT);
+ else if (const auto *VT = dyn_cast<VectorType>(QT.getTypePtr()))
+ Result = convertVectorType(VT);
+ else if (const auto *RT = dyn_cast<RecordType>(QT.getTypePtr()))
+ Result = convertRecordType(RT);
+ else if (const auto *ET = dyn_cast<EnumType>(QT.getTypePtr()))
+ Result = convertEnumType(ET);
+ else if (const auto *CT = dyn_cast<ComplexType>(QT.getTypePtr()))
+ Result = convertComplexType(CT);
+ else if (const auto *AT = dyn_cast<AtomicType>(QT.getTypePtr()))
+ return convertType(AT->getValueType());
+ else if (isa<BlockPointerType>(QT.getTypePtr()))
+ return createPointerTypeForPointee(ASTCtx.VoidPtrTy);
+ else if (isa<PipeType>(QT.getTypePtr()))
+ Result = createPointerTypeForPointee(ASTCtx.VoidPtrTy);
+ else if (const auto *MT = dyn_cast<ConstantMatrixType>(QT.getTypePtr())) {
+ const llvm::abi::Type *ElementType = convertType(MT->getElementType());
+ uint64_t NumElements = MT->getNumRows() * MT->getNumColumns();
+ return Builder.getArrayType(ElementType, NumElements,
+ ASTCtx.getTypeSize(QT), true);
+ } else if (const auto *MPT = dyn_cast<MemberPointerType>(QT.getTypePtr()))
+ Result = convertMemberPointerType(MPT);
+ else if (const auto *BIT = dyn_cast<BitIntType>(QT.getTypePtr())) {
+ unsigned RawNumBits = BIT->getNumBits();
+ bool IsSigned = BIT->isSigned();
+ llvm::Align TypeAlign = getTypeAlign(QT);
+ return Builder.getIntegerType(RawNumBits, TypeAlign, IsSigned, true);
+ } else if (isa<ObjCObjectType>(QT.getTypePtr()) ||
+ isa<ObjCObjectPointerType>(QT.getTypePtr())) {
+ // Objective-C objects are represented as pointers in the ABI
+ auto PointerSize =
+ ASTCtx.getTargetInfo().getPointerWidth(QT.getAddressSpace());
+ llvm::Align PointerAlign =
+ llvm::Align(ASTCtx.getTargetInfo().getPointerAlign(LangAS::Default));
+ return Builder.getPointerType(
+ PointerSize, llvm::Align(PointerAlign.value() / 8),
+ ASTCtx.getTargetInfo().getTargetAddressSpace(QT.getAddressSpace()));
+ } else
+ llvm_unreachable("Unsupported type for ABI lowering!");
+
+ if (Result)
+ TypeCache[QT] = Result;
+ return Result;
+}
+
+/// Converts C/C++ builtin types to LLVM ABI types.
+/// This handles all fundamental scalar types including integers, floats,
+/// and special types like void and bool.
+///
+/// \param BT The BuiltinType to convert
+/// \return Corresponding LLVM ABI integer, float, or void type
+const llvm::abi::Type *
+QualTypeMapper::convertBuiltinType(const BuiltinType *BT) {
+ QualType QT(BT, 0);
+
+ switch (BT->getKind()) {
+ case BuiltinType::Void:
+ return Builder.getVoidType();
+
+ case BuiltinType::NullPtr:
+ return createPointerTypeForPointee(QT);
+
+ case BuiltinType::Bool:
+ return Builder.getIntegerType(1, getTypeAlign(QT), false, false);
----------------
nikic wrote:
```suggestion
return Builder.getIntegerType(1, getTypeAlign(QT), /*Signed=*/false);
```
https://github.com/llvm/llvm-project/pull/174634
_______________________________________________
cfe-commits mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
