[Mlir-commits] [mlir] [mlir][Vector] Add a rewrite pattern for gather over a strided memref (PR #72991)

[Cullen Rhodes]

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@@ -151,3 +151,59 @@ func.func @gather_tensor_1d_none_set(%base: tensor<?xf32>, %v: vector<2xindex>,
   %0 = vector.gather %base[%c0][%v], %mask, %pass_thru : tensor<?xf32>, vector<2xindex>, vector<2xi1>, vector<2xf32> into vector<2xf32>
   return %0 : vector<2xf32>
 }
+
+// Check that vector.gather of a strided memref is replaced with a
+// vector.gather with indices encoding the original strides. Note that multiple
+// patterns are run for this example, e.g.:
+  //  1. "remove stride from gather source"
+  //  2. "flatten gather"
+// However, the main goal is to the test Pattern 1 above.
+#map = affine_map<()[s0] -> (s0 * 4096)>
+#map1 = affine_map<()[s0] -> (s0 * -4096 + 518400, 4096)>
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c-rhodes wrote:

this is unused and can be removed

https://github.com/llvm/llvm-project/pull/72991