[PATCH] D107604: [AArch64][GlobalISel] Widen G_IMPLICIT_DEF and G_FREEZE before clamping

[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.

Similar to other cleanup commits which widen instructions before clamping during legalization. Purpose of this is to avoid weird type breakdowns.

In terms of G_IMPLICIT_DEF, this simplifies legalization for other instructions. The legalizer has to emit G_IMPLICIT_DEF to legalize certain instructions, so this can help with emitting merges elsewhere.


https://reviews.llvm.org/D107604

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

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