[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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@@ -60,8 +60,51 @@ def DeviceMappingAttrInterface : AttrInterface<"DeviceMappingAttrInterface"> {
   ];
 }
 
+def DeviceMaskingAttrInterface : AttrInterface<"DeviceMaskingAttrInterface"> {
+  let cppNamespace = "::mlir";
+  let description = [{
+    Attribute interface describing how to filter the processing units that a
+    region is mapped to.
+
+    A popcount can be applied to determine the logical linear index that a
+    physical processing unit is responsible for.
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ftynse wrote:

I'm not sure this part of the documentation is understandable by itself. It seems to imply that the attribute is systematically a bitfield, and I'm not sure I fully understand how a popcount is always needed to get a logical linear index.

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