[PATCH] D139419: [AArch64] lower abs intrinsic to new ABS instruction in GIsel

[Ties Stuij via Phabricator via llvm-commits]

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When feature CSSC is available, the abs intrinsic should map to the
new scalar ABS instruction when using GlobalIsel

spec:
https://developer.arm.com/documentation/ddi0602/2022-09/Base-Instructions/ABS--Absolute-value-


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139419

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

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