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[mlir] Remove AppendToArgumentsList functionality from BufferizeTypeConverter.

Authored by silvas on Nov 4 2020, 10:57 AM.

Description

[mlir] Remove AppendToArgumentsList functionality from BufferizeTypeConverter.

This functionality is superceded by BufferResultsToOutParams pass (see
https://reviews.llvm.org/D90071) for users the require buffers to be
out-params. That pass should be run immediately after all tensors are gone from
the program (before buffer optimizations and deallocation insertion), such as
immediately after a "finalizing" bufferize pass.

The -test-finalizing-bufferize pass now defaults to what used to be the
allowMemrefFunctionResults=true flag. and the
finalizing-bufferize-allowed-memref-results.mlir file is moved
to test/Transforms/finalizing-bufferize.mlir.

Differential Revision: https://reviews.llvm.org/D90778