[LLVMdev] Fwd: Problem getting LoopInfo inside non-LoopPass

[Ryan Taylor]

Nick,

   Thanks for this info, though this didn't help my problem at all.

On Wed, Nov 16, 2011 at 7:21 PM, Nick Lewycky <nicholas at mxc.ca> wrote:

> Never create a Twine as a local variable.
>
>  V->setName(Twine("new_name"));
>
> should work fine, however. Note that Twine itself has an implicit
> constructor from const char *, so this code:
>
>  V->setName("new_name");
>
> should also work fine.
>
> Nick
>
> Ryan Taylor wrote:
>
>> Basically I have two separate passes (first is a loop pass) which are
>> two different files and two different opts but I need to keep the data
>> consistent (ie, I want the changes to show up the resulting .bc output
>> file from the first (loop) pass so the second pass can use these new
>> names. Currently, when I print out "BB->getName().str()" after the code
>> below, I get the correct renaming but this doesn't show up in the output
>> file.
>>
>> I'm calling the opt like this:
>>
>> opt -load Release/lib/OptFile.so -optTag -S <file.bc> -o file.ll
>>
>> I have also tried:
>>
>> opt -load Release/lib/OptFile.so -optTag <file.bc> -o file.bc
>>
>> Thanks.
>>
>> ---------- Forwarded message ----------
>> From: *Ryan Taylor* <ryta1203 at gmail.com <mailto:ryta1203 at gmail.com>>
>> Date: Wed, Nov 16, 2011 at 5:23 PM
>> Subject: Re: [LLVMdev] Problem getting LoopInfo inside non-LoopPass
>> To: llvmdev at cs.uiuc.edu <mailto:llvmdev at cs.uiuc.edu>
>>
>>
>> LLVMers,
>>
>>   So, I'm trying to write a pass that changes the names of the basic
>> blocks through the use of Value, so:
>>
>>   Value *V = *BasicBlockPtr;
>>   const Twine Tname("new_name");
>>   V->setName(Tname);
>>
>> But when I run the opt and look at the IR output nothing is changed? Not
>> sure what I'm doing wrong.
>>
>> Thanks.
>>
>>
>>
>>
>>
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>
>
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