[llvm] [llvm][DebugInfo] Encode DW_AT_object_pointer on method declarations with DW_FORM_implicit_const (PR #124790)

[Adrian Prantl via llvm-commits]

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@@ -1358,7 +1369,20 @@ void DwarfUnit::applySubprogramAttributes(const DISubprogram *SP, DIE &SPDie,
 
     // Add arguments. Do not add arguments for subprogram definition. They will
     // be handled while processing variables.
-    constructSubprogramArguments(SPDie, Args);
+    //
+    // Encode the object pointer as an index instead of a DIE reference in order
+    // to minimize the affect on the .debug_info size.
+    if (std::optional<unsigned> ObjectPointerIndex =
+            constructSubprogramArguments(SPDie, Args)) {
+      if (getDwarfDebug().tuneForLLDB() &&
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adrian-prantl wrote:

If this is spec conformant, I don't think we need to hide in LLDB tuning.

https://github.com/llvm/llvm-project/pull/124790