[llvm] [RFC] Emit dwarf data for signature-changed or new functions (PR #157349)

[Matt Arsenault via llvm-commits]

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@@ -1266,11 +1266,83 @@ void DwarfDebug::finishSubprogramDefinitions() {
   }
 }
 
+void DwarfDebug::addChangedSubprograms() {
+  // Generate additional dwarf for functions with signature changed.
+  NamedMDNode *NMD = MMI->getModule()->getNamedMetadata("llvm.dbg.cu");
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arsenm wrote:

Module::debug_compile_units

https://github.com/llvm/llvm-project/pull/157349