[llvm-branch-commits] [mlir] [mlir][SCF][GPU] Add DeviceMaskingAttrInterface support to scf::Foral… (PR #146943)

[Oleksandr Alex Zinenko via llvm-branch-commits]

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@@ -252,6 +252,24 @@ def GPULaneMappingAttr
   }];
 }
 
+def GPUMappingMaskAttr : GPU_Attr<"GPUMappingMask", "mask", [
+  DeclareAttrInterfaceMethods<DeviceMaskingAttrInterface> ] >  {
+  let parameters = (ins "uint64_t":$mask);
+  let assemblyFormat = "`<` params `>`";
+  let description = [{
+    Attribute describing how to filter the processing units that a
+    region is mapped to.
+
+    In the first implementation the masking is a bitfield that specifies for
+    each processing unit whether it is active or not.
+
+    In the future, we may want to implement this as a symbol to refer to
+    dynamically defined values.
+
+    Extending op semantics with an operand is deemed too intrusive at this time.
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ftynse wrote:

I think this rather belongs to code documentation or some rationale document, or even a commit message, not user-facing documentation.

https://github.com/llvm/llvm-project/pull/146943