[llvm] Fix buildbot failure by explicitly disabling partial reductions in TTI. (PR #190165)

[Benjamin Maxwell via llvm-commits]

================
@@ -157,6 +157,15 @@ class VETTIImpl final : public BasicTTIImplBase<VETTIImpl> {
       return true;
     return !isSupportedReduction(II->getIntrinsicID());
   }
+
+  InstructionCost getPartialReductionCost(
+      unsigned Opcode, Type *InputTypeA, Type *InputTypeB, Type *AccumType,
+      ElementCount VF, TTI::PartialReductionExtendKind OpAExtend,
+      TTI::PartialReductionExtendKind OpBExtend, std::optional<unsigned> BinOp,
+      TTI::TargetCostKind CostKind,
----------------
MacDue wrote:

I think you need to add `using TTI = TargetTransformInfo;` to `VETTIImpl` or spell `TargetTransformInfo` out here to fix the build issues:


```suggestion
      TargetTransformInfo::PartialReductionExtendKind OpBExtend, std::optional<unsigned> BinOp,
      TargetTransformInfo::TargetCostKind CostKind,
```

https://github.com/llvm/llvm-project/pull/190165