[clang] [llvm] [HLSL] Add `Increment`/`DecrementCounter` methods to structured buffers (PR #114148)

[Greg Roth via cfe-commits]

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@@ -4883,6 +4882,12 @@ def HLSLRadians : LangBuiltin<"HLSL_LANG"> {
   let Prototype = "void(...)";
 }
 
+def HLSLBufferUpdateCounter : LangBuiltin<"HLSL_LANG"> {
+  let Spellings = ["__builtin_hlsl_buffer_update_counter"];
+  let Attributes = [NoThrow, Const];
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pow2clk wrote:

I don't know what effect these attributes have or if I'm understanding Const correctly, but if that implies it doesn't change any memory, it does.

https://github.com/llvm/llvm-project/pull/114148