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[MIPS GlobalISel] Register bank select for G_PHI. Select i64 phi

Authored by Petar.Avramovic on Jul 8 2019, 8:51 AM.



Select gprb or fprb when def/use register operand of G_PHI is
used/defined by either:
copy to/from physical register or
instruction with only one mapping available for that use/def operand.

Integer s64 phi is handled with narrowScalar when mapping is applied,
produced artifacts are combined away. Manually set gprb to all register
operands of instructions created during narrowScalar.

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Event Timeline

Petar.Avramovic created this revision.Jul 8 2019, 8:51 AM
Herald added a project: Restricted Project. · View Herald TranscriptJul 8 2019, 8:52 AM
This revision is now accepted and ready to land.Jul 9 2019, 6:50 AM
This revision was automatically updated to reflect the committed changes.