[llvm-dev] Creating an instance of new pass manager in tool

[Ejjeh, Adel via llvm-dev]

Thanks Arthur

I will look at those files, it sounds like they should contain what I need.

-Adel

From: Arthur Eubanks <aeubanks at google.com>
Date: Thursday, December 3, 2020 at 11:30 AM
To: Ejjeh, Adel <aejjeh at illinois.edu>
Cc: LLVM Dev <llvm-dev at lists.llvm.org>
Subject: Re: [llvm-dev] Creating an instance of new pass manager in tool
Looking at the existing users of the new pass manager may be useful. See BackendUtil.cpp for how Clang sets up the new pass manager, and NewPMDriver.cpp for how opt sets it up.

There should be no need to initialize individual passes, although you can inject your own analyses (e.g. alias analysis).

On Thu, Dec 3, 2020 at 9:21 AM Ejjeh, Adel via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:
Hello

I am writing a tool within an external project, and I need to use an instance of the new pass manager to invoke LLVM analyses. It used to be possible to create an initialized instance of the legacy::FunctionPassManager by providing the Module to the constructor. I was unable to find a corresponding way to initialize an instance of the new FunctionAnalysisManager. When I tried to construct an instance of FunctionAnalysisManager and use it, none of the passes were registered and I found myself having to register every single LLVM pass, even if it is not directly invoked by my tool (which is not feasible). What is the correct way to do this?

Thanks
-Adel Ejjeh
--
Adel Ejjeh
PhD Candidate | Computer Science
University of Illinois at Urbana Champaign
Email: aejjeh at illinois.edu<mailto:aejjeh at illinois.edu> | adel.ejjeh at gmail.com<mailto:adel.ejjeh at gmail.com>
Zoom: https://illinois.zoom.us/my/aejjeh

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