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

[Ryan Taylor]

So is this simply not possible?

On Thu, Nov 17, 2011 at 10:31 AM, Ryan Taylor <ryta1203 at gmail.com> wrote:

> 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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