[Mlir-commits] [mlir] [mlir][linalg] do not break outs from block argument (PR #73572)

[Okwan Kwon]

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@@ -1818,6 +1818,11 @@ struct RemoveOutsDependency : public OpRewritePattern<GenericOp> {
         if (sparse_tensor::getSparseTensorEncoding(operandVal.getType()))
           continue;
 
+        // If outs is wired from a block argument, keep the dependency to
+        // prevent the argument from being optimized away.
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okkwon wrote:

The pattern rewriter actually breaks the original dependency for an argument used for `outs`. (Assuming that a tensor *can* used for output after some lowering, we need to keep this dependency.)


https://github.com/llvm/llvm-project/pull/73572