[Mlir-commits] [mlir] [mlir][x86] Add extra patterns for AMX nano-kernel lowering (acc with zero constant) (PR #222513)

[Adam Siemieniuk]

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@@ -1124,6 +1146,14 @@ struct VectorContractToAMXDotProduct
               "the re-write conditions either the dimensions are "
               "wrong or MemRef source are different or many users.");
 
+        Operation *contractReadOp =
+            traceToVectorReadLikeParentOperation(contract.getAcc());
+
+        if (isAccZeroVectorConstant != isZeroVectorConstant(contractReadOp))
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adam-smnk wrote:

Does init value really matter?
I think I should be able to perform compute regardless of underlying values if other layout conditions are satisfied.

https://github.com/llvm/llvm-project/pull/222513