David Green 1ba8f4f67d [AArch64] Move v4i8 concat load lowering to a combine. ...

The existing code was not updating the uses of loads that it recreated,
leading to incorrect chains which could break the ordering between
nodes. This moves the code to a combine instead, and makes sure we
update the chain references. This does mean it happens earlier -
potentially before the concats are simplified. This can lead to
inefficiencies in the codegen, which will be fixed in followups.

2022-04-14 15:19:33 +01:00

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