[lldb] [llvm] [lldb] Return an llvm::Expected from DWARFExpression::Evaluate (NFCI) (PR #94420)

[David Spickett via llvm-commits]

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@@ -572,28 +572,32 @@ TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
 static std::optional<uint32_t>
 ExtractDataMemberLocation(DWARFDIE const &die, DWARFFormValue const &form_value,
                           ModuleSP module_sp) {
+  Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
+
   // With DWARF 3 and later, if the value is an integer constant,
   // this form value is the offset in bytes from the beginning of
   // the containing entity.
   if (!form_value.BlockData())
     return form_value.Unsigned();
 
   Value initialValue(0);
-  Value memberOffset(0);
   const DWARFDataExtractor &debug_info_data = die.GetData();
   uint32_t block_length = form_value.Unsigned();
   uint32_t block_offset =
       form_value.BlockData() - debug_info_data.GetDataStart();
-  if (!DWARFExpression::Evaluate(
-          nullptr, // ExecutionContext *
-          nullptr, // RegisterContext *
-          module_sp, DataExtractor(debug_info_data, block_offset, block_length),
-          die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, memberOffset,
-          nullptr)) {
+
+  llvm::Expected<Value> memberOffset = DWARFExpression::Evaluate(
+      nullptr, // ExecutionContext *
+      nullptr, // RegisterContext *
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DavidSpickett wrote:

Maybe these comments should be the `/*foo=*/` form that (so I'm told) clang tooling can verify.

https://github.com/llvm/llvm-project/pull/94420