llvm dev - Dec 2013 - [LLVMdev] unconditional branch folding

Hello guys,

Do we have a pass to do unconditional branch folding except the one in
Codegen?  I checked in the lib/Transforms/Scalar, did not see any
promising one.

thank you,
yuanfang

Yuanfang Chen wrote:
> Hello guys,
>
> Do we have a pass to do unconditional branch folding except the one in
> Codegen?  I checked in the lib/Transforms/Scalar, did not see any
> promising one.
SimplifyCFG? The pass is lib/Transforms/Scalar/SimplifyCFGPass.cpp but 
the logic is really in lib/Transforms/Utils/SimplifyCFG.cpp .

Nick

ops


---------- Forwarded message ----------
From: Yuanfang Chen <cyfmxc at gmail.com>
Date: Sun, Jan 12, 2014 at 7:43 PM
Subject: Re: [LLVMdev] unconditional branch folding
To: Nick Lewycky <nicholas at mxc.ca>


Thanks Nick. I found it in llvm/Transforms/Utils/Local.h, it's called
MergeBasicBlockIntoOnlyPred

On Sat, Dec 14, 2013 at 6:08 PM, Nick Lewycky <nicholas at mxc.ca>
wrote:
> Yuanfang Chen wrote:
>>
>> Hello guys,
>>
>> Do we have a pass to do unconditional branch folding except the one in
>> Codegen?  I checked in the lib/Transforms/Scalar, did not see any
>> promising one.
>
>
> SimplifyCFG? The pass is lib/Transforms/Scalar/SimplifyCFGPass.cpp but the
> logic is really in lib/Transforms/Utils/SimplifyCFG.cpp .
>
> Nick