[PATCH] D107508: [AArch64][GlobalISel] Legalize wide vector G_PHIs

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
paquette added reviewers: aemerson, jroelofs.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls, rovka.
paquette requested review of this revision.
Herald added a project: LLVM.

Clamp the max number of elements when legalizing G_PHI. This allows us to legalize some common fallbacks like 4 x s64.

Here's an example: https://godbolt.org/z/6YocsEYTd

Had to add -global-isel-abort=0 to legalize-phi.mir to account for the G_EXTRACT_VECTOR_ELT from the 32 x s8 G_PHI.


https://reviews.llvm.org/D107508

Files:
  llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-phi.mir

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