[gicombiner] Add support for arbitrary match data being passed from match to apply

[dsanders]

Summary

This is used by the extending_loads combine to tell the apply step which
use is the preferred one to fold and the other uses should be re-written
to consume.

Depends on D69117

[volkan]

LGTM.

llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-concat-vectors.mir

22 ↗

(On Diff #225539)

These changes doesn't look relevant, could you double check?

[dsanders]

llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-concat-vectors.mir

22 ↗

(On Diff #225539)

Looks like it was caused by a bad rebase that lost the G_CONCAT_VECTORS case. I'm testing a fix for that and if all goes well I'll push this tomorrow.

[dsanders]

Update before commit (and because arcanist keeps pulling down the wrong commit message)