[LLVMdev] Passing command line arguments to optimization passes

[Arnaud Allard de Grandmaison]

You could make the cl:opt object visible outside one of your passes, and use it in your other passes : in other words, it is a global variable shared between several files.

Best regards,
--
Arnaud de Grandmaison

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of guyadini
Sent: Thursday, January 27, 2011 12:38 PM
To: llvmdev at cs.uiuc.edu
Subject: Re: [LLVMdev] Passing command line arguments to optimization passes


A follow-up question:
Is there a way to make different passes accept one command line option that
will affect all of them?

For example, I'd like to have a -optStrength parameter, that can be given to
all of my passes simultaneously.

Thanks a lot,
Guy


Arnaud Allard de Grandmaison wrote:
>
> Hi Harel,
>
> Several existing passes can take command line arguments. Have a look at
> lib/Transforms/Scalar/LoopUnrollPass.cpp for example. Its command line
> arguments are defined using the cl::opt objects.
>
> Best regards,
> --
> Arnaud de Grandmaison
> ________________________________
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
> Behalf Of Harel Cain
> Sent: Thursday, January 27, 2011 10:05 AM
> To: llvmdev at cs.uiuc.edu
> Subject: [LLVMdev] Passing command line arguments to optimization passes
>
> Hi all,
>
> I was wondering if there's any way to pass command line arguments to LLVM
> optimization passes when run through the opt tool.
>
> For example, suppose I register called MyPass, then I want to run
>
> opt -load libMyPass.so -MyPass 3 < input.bc
>
> and have "3" be available to MyPass as a kind of argv argumnet through
> some method.
>
>
> Or does it take a major rewrite of the opt tool command line parsing?
>
>
> Thanks!
>
> Harel Cain
>
> _______________________________________________
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> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
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>

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