[llvm] [SPIRV] Fix enqueue empty kernel (PR #187671)

[Arseniy Obolenskiy via llvm-commits]

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@@ -2737,13 +2747,35 @@ static bool buildEnqueueKernel(const SPIRV::IncomingCall *Call,
     }
   }
 
+  // Prepare block invoke function and block literal before building
+  // OpEnqueueKernel.
+  const unsigned BlockFIdx = HasEvents ? 6 : 3;
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aobolensk wrote:

Does it make sense to test the case without events? As I can see the current test is with events (`__enqueue_kernel_basic_events`)

https://github.com/llvm/llvm-project/pull/187671