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

[Ryan Taylor]

I would have thought this would have been possible.

On Thu, Nov 17, 2011 at 3:49 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:

> 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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