[llvm] [SPIRV] Emit NonSemantic DebugValue (PR #224158)

[Manuel Carrasco via llvm-commits]

================
@@ -441,6 +558,16 @@ void SPIRVNonSemanticDebugHandler::prepareModuleOutput(
   // fresh result ID for it now; the same ID is used in emitExtInst() operands.
   if (!MAI.ExtInstSetMap.count(NSSet))
     MAI.ExtInstSetMap[NSSet] = MAI.getNextIDRegister();
+
+  // Types, constants and globals never reach endInstruction(), and this section
+  // is written before every function body, so record them as already emitted.
+  // handleTypeDeclOrConstant() keeps only one instruction per signature here
+  // and aliases every duplicate to its id (which identifies them).
+  for (const MachineInstr *MI : MAI.getMSInstrs(SPIRV::MB_TypeConstVars)) {
+    MCRegister Id = getResultId(*MI, MAI);
+    if (Id.isValid())
+      ModuleScopeIds.insert(Id);
----------------
mgcarrasco wrote:

```
if (MCRegister Id = getResultId(*MI, MAI))
  ModuleScopeIds.insert(Id);
```

https://github.com/llvm/llvm-project/pull/224158