[llvm] [SPIR-V] Implement SPV_KHR_untyped_pointers extension (PR #201233)

[Arseniy Obolenskiy via llvm-commits]

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@@ -404,6 +420,20 @@ class SPIRVGlobalRegistry : public SPIRVIRMapping {
   // argument. Otherwise returns 0.
   unsigned getNumScalarOrVectorTotalBitWidth(SPIRVTypeInst Type) const;
 
+  // Size in bytes of the LLVM type for the given SPIR-V type, or 0 if unknown.
+  unsigned getSPIRVTypeByteSize(SPIRVTypeInst Type) const;
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aobolensk wrote:

Do you use this function? It seems to be freshly added and there are no callers 

https://github.com/llvm/llvm-project/pull/201233