[Mlir-commits] [mlir] [MLIR][ROCDL] Add conversion for gpu.subgroup_id to ROCDL (PR #136405)

[Alan Li]

================
@@ -204,6 +204,15 @@ def ROCDL_ReadlaneOp : ROCDL_IntrOp<"readlane", [], [0], [AllTypesMatch<["res",
    }];
 }
 
+// The LLVM intrinsic function name is rather mouthful,
+// so here we opt to use a shorter rocdl name.
+def ROCDL_WaveIdOp :  LLVM_IntrOpBase<ROCDL_Dialect, "wave_id",
+                        "amdgcn_s_get_waveid_in_workgroup", [], [], [], 1>,
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lialan wrote:

Actually, the corresponding llvm intrinsic function has properties as follows:
```
[NoUndef<RetIndex>, IntrNoMem, IntrHasSideEffects, IntrWillReturn, IntrNoCallback, IntrNoFree]>;
```

and also:
```
def Pure : TraitList<[AlwaysSpeculatable, NoMemoryEffect]>;
```

So I guess we should keep `Pure` ?

https://github.com/llvm/llvm-project/pull/136405