[llvm] Introduce DwarfUnit::addBlock helper method (PR #168446)

[Tom Tromey via llvm-commits]

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@@ -441,6 +441,14 @@ void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute,
   addBlock(Die, Attribute, Block->BestForm(), Block);
 }
 
+void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute, DIExpression *Expr) {
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tromey wrote:

I made this change.

https://github.com/llvm/llvm-project/pull/168446