llvm dev - Nov 2011 - [LLVMdev] Fwd: Problem getting LoopInfo inside non-LoopPass

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>
Date: Wed, Nov 16, 2011 at 5:23 PM
Subject: Re: [LLVMdev] Problem getting LoopInfo inside non-LoopPass
To: 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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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.
>
>
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

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.
>>
>>
>>
>>
>>
>> ______________________________**_________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>
http://lists.cs.uiuc.edu/**mailman/listinfo/llvmdev<http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev>
>>
>
>
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