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

[Arseniy Obolenskiy via cfe-commits]

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@@ -2519,6 +2521,25 @@ void addInstrRequirements(const MachineInstr &MI,
     // TODO: Add UntypedPointersKHR when implemented.
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aobolensk wrote:

```suggestion
```

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