[Mlir-commits] [mlir] [mlir][linalg] Restrict linalg.pack to not have artificial padding. (PR #149624)

[Han-Chung Wang]

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@@ -150,9 +150,10 @@ def Linalg_PackOp : Linalg_RelayoutOp<"pack", [
 
     `padding_value` specifies a padding value at the boundary on non-perfectly
     divisible dimensions. Padding is optional:
-    - If absent, it is UB if the tile does not perfectly divide the dimension.
+    - If absent, it assumes the tile perfectly divides the dimension.
     - If present, it will pad along high dimensions (high-padding) to make the
-      tile complete.
+      tile complete. Note that it is not allowed to have artificial padding that
+      is not strictly required by linalg.pack.
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hanhanW wrote:

Yes, it makes sense to me as the goal is having few more assumptions in the transformation. I'll mention UB explicitly here.

https://github.com/llvm/llvm-project/pull/149624