[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:

I've left the FP intrinsic code the same as before because I believe it's correct for SVE. All SVE FP types < 128-bits are legal, leaving only the wider types that need splitting and LT.cost will correspond to the number of instructions.

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