[llvm] [AArch64][GlobalISel] Legalize 128-bit types for FABS (PR #104753)

[Matt Arsenault via llvm-commits]

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@@ -257,6 +257,20 @@ AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
       .clampNumElements(0, v2s64, v2s64)
       .moreElementsToNextPow2(0);
 
+  getActionDefinitionsBuilder(G_FABS)
+      .legalFor({MinFPScalar, s32, s64, v2s32, v4s32, v2s64})
+      .legalIf([=](const LegalityQuery &Query) {
+        const auto &Ty = Query.Types[0];
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arsenm wrote:

no auto, and no reference. this is just LLT. You can also express this as a conditional legalFor, or swap out the legalFor list based on the HasFP16 feature 

https://github.com/llvm/llvm-project/pull/104753