[PATCH] D106998: [AArch64][GlobalISel] Improve legalization for odd-sized G_ICMP/G_CONSTANT

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
paquette added a reviewer: aemerson.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls, rovka.
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We were handing types like s88 like

1. clamp to the range
2. widen to the next power of 2

This isn't desirable because it causes an odd breakdown for types like s88. If we widen to the next power of 2 (s128) first, then we get a clean breakdown when we clamp back to s64.


https://reviews.llvm.org/D106998

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

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