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2020 Jul 20
2
Selection DAG chain question
I did it by code preparing into an intrinsic that has side effects. Pseudo
instruction would work as well. I'm not sure if glue would help, since the
nodes A->B, C->D from example above are not necessarily adjacent.
More hooks into the selection DAG builder may be an idea for a LLVM
extension. For example in this case, custom allowing for a node to be built
with an existing chain would