https://github.com/swedgwood created https://github.com/llvm/llvm-project/pull/150208
Decided I would take a stab at https://github.com/llvm/llvm-project/issues/110273 (I'm the same person but different account) Still WIP (I'm very new to the codebase!) - but right now (as of 567cb48) LLDB will no longer say 'Unable to determine byte size' and display the correct values for signed/unsigned `_BitInt`s provided their bit size is a multiple of 8 (as something is still wrong with the way clang compiles the DWARF info, and maybe also with the way LLDB parses it) >From 567cb482dd63541a6f4569582a44e17556fe01f0 Mon Sep 17 00:00:00 2001 From: Sam Wedgwood <s...@wedgwood.dev> Date: Wed, 23 Jul 2025 12:00:07 +0100 Subject: [PATCH] partial support in lldb --- .../TypeSystem/Clang/TypeSystemClang.cpp | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp b/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp index bafe9d56a93bf..5c812b05ddb43 100644 --- a/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp +++ b/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp @@ -1013,6 +1013,11 @@ CompilerType TypeSystemClang::GetBuiltinTypeForDWARFEncodingAndBitSize( if (QualTypeMatchesBitSize(bit_size, ast, ast.Int128Ty)) return GetType(ast.Int128Ty); } + if (type_name.contains("_BitInt")) { + auto bitIntTy = ast.getBitIntType(false, bit_size); + if (QualTypeMatchesBitSize(bit_size, ast, bitIntTy)) + return GetType(bitIntTy); + } } // We weren't able to match up a type name, just search by size if (QualTypeMatchesBitSize(bit_size, ast, ast.CharTy)) @@ -1064,6 +1069,10 @@ CompilerType TypeSystemClang::GetBuiltinTypeForDWARFEncodingAndBitSize( return GetType(ast.UnsignedIntTy); if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedInt128Ty)) return GetType(ast.UnsignedInt128Ty); + } else if (type_name.contains("_BitInt")) { + auto bitIntTy = ast.getBitIntType(true, bit_size); + if (QualTypeMatchesBitSize(bit_size, ast, bitIntTy)) + return GetType(bitIntTy); } } // We weren't able to match up a type name, just search by size @@ -3858,6 +3867,14 @@ TypeSystemClang::GetTypeInfo(lldb::opaque_compiler_type_t type, ->getModifiedType() .getAsOpaquePtr(), pointee_or_element_clang_type); + case clang::Type::BitInt: { + const clang::BitIntType *bitint_type = llvm::cast<clang::BitIntType>(qual_type->getCanonicalTypeInternal()); + uint32_t bitint_type_flags = eTypeHasValue | eTypeIsScalar | eTypeIsInteger; + if (bitint_type->isSigned()) { + bitint_type_flags |= eTypeIsSigned; + } + return bitint_type_flags; + } case clang::Type::Builtin: { const clang::BuiltinType *builtin_type = llvm::cast<clang::BuiltinType>(qual_type->getCanonicalTypeInternal()); _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
