[Mlir-commits] [mlir] [mlir][Linalg] implement bufferization for `linalg.pack` (PR #177982)

[Matthias Springer]

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@@ -191,6 +191,47 @@ struct SoftmaxOpInterface
     return success();
   }
 };
+
+struct PackOpInterface
+    : public DstBufferizableOpInterfaceExternalModel<PackOpInterface,
+                                                     linalg::PackOp> {
+  bool bufferizesToMemoryRead(Operation *op, OpOperand &opOperand,
+                              const AnalysisState &state) const {
+    auto packOp = cast<linalg::PackOp>(op);
+    return !packOp.isDpsInit(&opOperand);
+  }
+
+  LogicalResult bufferize(Operation *op, RewriterBase &rewriter,
+                          const BufferizationOptions &options,
+                          BufferizationState &state) const {
+    auto packOp = cast<linalg::PackOp>(op);
+    if (packOp.hasPureBufferSemantics())
+      return success();
+    if (!packOp.hasPureTensorSemantics())
+      return packOp.emitError() << "op does not have pure tensor semantics";
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matthias-springer wrote:

This could be supported in the future, so maybe rephrase as `mixed tensor/buffer semantic op not supported yet`

https://github.com/llvm/llvm-project/pull/177982