[llvm-dev] [llvm] Query the target from an opt pass?

[Friedman, Eli via llvm-dev]

On 4/3/2018 11:15 AM, Kevin Neal wrote:
>
> Hmmm, a quick look at the documentation for TargetTransformInfo 
> doesn't look
>
> like it.
>
> In LegalizeDAG.cpp it uses TLI.getOperationAction() to find out if an 
> SDNode
>
> should be expanded by the legalizer or passed down to the target. 
> That's what
>
> I need to know, but I need it in a pass pre-legalization.
>

Right; you probably need to add a TTI hook (which can call into TLI).

The ScalarizeMaskedMemIntrin pass is a good example to follow.

-Eli

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project

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