[llvm] [DebugInfo][RemoveDIs] Add local-utility plumbing for DPValues (PR #72276)

[Orlando Cazalet-Hyams via llvm-commits]

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@@ -2391,6 +2688,8 @@ llvm::removeAllNonTerminatorAndEHPadInstructions(BasicBlock *BB) {
       ++NumDeadDbgInst;
     else
       ++NumDeadInst;
+    // RemoveDIs: erasing debug-info must be done manually.
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OCHyams wrote:

Do we need to `dropDbgValues` / `assert(has_no_dbg_values)` in the `if (Inst->isEHPad() || Inst->getType()->isTokenTy())` (outside the default context, above)?

https://github.com/llvm/llvm-project/pull/72276