[llvm] r228328 - [PowerPC] Prepare loops for pre-increment loads/stores

[Eric Christopher]

>
>
> +
> +  const PPCSubtarget *ST =
> +    TM ? TM->getSubtargetImpl(*Header->getParent()) : nullptr;
> +
>

I believe you can always depend on the TargetMachine existing.

-eric
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