[llvm] [AArch64] Fix SVE cost model for various math intrinsics (PR #184358)

[David Sherwood via llvm-commits]

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@@ -1114,6 +1121,25 @@ AArch64TTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
       return getCallInstrCost(nullptr, RetTy, ICA.getArgTypes(), CostKind);
     break;
   }
+  case Intrinsic::sqrt:
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david-arm wrote:

Also, NEON goes down the same path as SVE for calculating the cost, e.g. getTypeBasedIntrinsicInstrCost (see code snippet above). It's just the NEON sqrt is legal and so the cost is 1.

https://github.com/llvm/llvm-project/pull/184358