[PATCH] D139417: [AArch64] add GlobalIsel support for scalar CNT instruction

[Ties Stuij via Phabricator via llvm-commits]

stuij created this revision.
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When feature CSSC is available we should use instruction CNT for s32, s64 and
s128 types in GlobalIsel's G_CTPOP.

spec:
https://developer.arm.com/documentation/ddi0602/2022-09/Base-Instructions/CNT--Count-bits-


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139417

Files:
  llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-ctpop-no-implicit-float.mir
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-ctpop.mir

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