20c926e079
The rewrite logic has an optimization to drop a cast operation after rewriting block arguments if the cast operation has no users. This is unsafe as there might be a pending rewrite that replaced the cast operation itself and hence would trigger a second free. Instead, do not remove the casts and leave it up to a later canonicalization to do so. Differential Revision: https://reviews.llvm.org/D92184
Multi-Level Intermediate Representation
See https://mlir.llvm.org/ for more information.