llvm dev - Jan 2011 - [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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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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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
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> 
> 
-- 
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