[Mlir-commits] [mlir] [MLIR][XeGPU][VectorToXeGPU] Add lowering from vector.gather/scatter to xegpu.load/store (PR #158024)

[Adam Siemieniuk]

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@@ -97,6 +97,17 @@ static LogicalResult transferPreconditions(PatternRewriter &rewriter,
   return success();
 }
 
+// Common preconditions for the lowering of vector.gather and vector.scatter:
+//  1. Source is a memref.
+static LogicalResult gatherScatterPreconditions(PatternRewriter &rewriter,
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adam-smnk wrote:

Could you also add negative test cases that cover preconditions?

Just a simple test to ensure matcher rejects what it's supposed to.
For example, see `@negative_gemm_transpose_a` in `contract-to-xegpu.mlir`.

https://github.com/llvm/llvm-project/pull/158024