[Mlir-commits] [mlir] [mlir][Vector] add vector.insert canonicalization pattern for vectors created from ub.poison (PR #142944)
Yang Bai
llvmlistbot at llvm.org
Wed Jun 25 02:17:37 PDT 2025
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@@ -3191,6 +3227,109 @@ class InsertSplatToSplat final : public OpRewritePattern<InsertOp> {
}
};
+// Pattern to optimize a chain of constant insertions into a poison vector.
+//
+// This pattern identifies chains of vector.insert operations that:
+// 1. Start from an ub.poison operation.
+// 2. Insert only constant values at static positions.
+// 3. Completely initialize all elements in the resulting vector.
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yangtetris wrote:
Good catch!
https://github.com/llvm/llvm-project/pull/142944
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