================
@@ -568,6 +568,32 @@ AArch64TTIImpl::getIntrinsicInstrCost(const
IntrinsicCostAttributes &ICA,
}
return Cost;
}
+ case Intrinsic::vector_extract: {
+ // If both the vector argument and the return type are legal types, then
+ // this should be a no-op or simple operation; return a relatively low
cost.
+ LLVMContext &C = RetTy->getContext();
+ EVT MRTy = getTLI()->getValueType(DL, RetTy);
+ EVT MPTy = getTLI()->getValueType(DL, ICA.getArgTypes()[0]);
+ TargetLoweringBase::LegalizeKind RLK = getTLI()->getTypeConversion(C,
MRTy);
+ TargetLoweringBase::LegalizeKind PLK = getTLI()->getTypeConversion(C,
MPTy);
+ if (RLK.first == TargetLoweringBase::TypeLegal &&
+ PLK.first == TargetLoweringBase::TypeLegal)
+ return InstructionCost(1);
----------------
sdesmalen-arm wrote:
Just pointing out that the code isn't updated yet to handle predicates
differently, as those inserts/extracts are indeed not free.
https://github.com/llvm/llvm-project/pull/81135
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