Craig Topper 0cdc1b6dd4
[SelectionDAG] Support integer types with multiple registers in ComputePHILiveOutRegInfo. (#172081)
PHIs that are larger than a legal integer type are split into multiple
virtual registers that are numbered sequentially. We can propagate the
known bits for each of these registers individually.

Big endian is not supported yet because the register order needs to be
reversed.

Fixes #171671
2025-12-13 13:24:41 -08:00
..
2025-07-15 13:22:33 -04:00