[Mlir-commits] [mlir] [mlir][vector] Migrate drop-lead-unit-dim to shape_cast (PR #196206)

[Andrzej Warzyński]

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@@ -45,14 +48,89 @@ static VectorType trimLeadingOneDims(VectorType oldType) {
   return VectorType::get(newShape, oldType.getElementType(), newScalableDims);
 }
 
-/// Return a smallVector of size `rank` containing all zeros.
-static SmallVector<int64_t> splatZero(int64_t rank) {
-  return SmallVector<int64_t>(rank, 0);
+/// Returns `value` if it already has `newType`, otherwise inserts a
+/// vector.shape_cast to `newType`.
+static Value shapeCastVector(OpBuilder &b, Location loc, Value value,
+                             VectorType newType) {
+  if (value.getType() == newType)
+    return value;
+  return vector::ShapeCastOp::create(b, loc, newType, value);
 }
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banach-space wrote:

`createOrFold`?

https://github.com/llvm/llvm-project/pull/196206