[llvm] [SPIRV] Add support for `cl_khr_extended_bit_ops` (PR #120571)

[Dmitry Sidorov via llvm-commits]

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@@ -2743,9 +2743,90 @@ entry:
 
 declare spir_func <16 x i8> @_Z11bit_reverseDv16_h(<16 x i8> noundef) 
 
+; Test SPIRV-friendly builtins.
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MrSidims wrote:

This test is worth to out separately from cl_khr_extended_bit_ops.ll

https://github.com/llvm/llvm-project/pull/120571