[llvm] [AMDGPU] New intrinsic llvm.amdgcn.pops.exiting.wave.id (PR #89612)

[Jay Foad via llvm-commits]

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@@ -2485,6 +2485,9 @@ class AMDGPUGlobalLoadLDS : Intrinsic <
   "", [SDNPMemOperand]>;
 def int_amdgcn_global_load_lds : AMDGPUGlobalLoadLDS;
 
+def int_amdgcn_pops_exiting_wave_id :
+  DefaultAttrsIntrinsic<[llvm_i32_ty], [], [IntrNoMem, IntrSpeculatable]>;
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jayfoad wrote:

Since this reads a volatile value it might need some more attributes - maybe `IntrHasSideEffects`?

https://github.com/llvm/llvm-project/pull/89612