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Ryan Taylor

2011-Nov-21 18:35 UTC

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

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.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ______________________________**_________________
>>>> 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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Ryan Taylor

2011-Nov-30 02:59 UTC

head link

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

The following code is causing an "UNREACHABLE executed!" and a stack
dump,
any ideas?

namespace {
  struct myPass : public CallGraphSCCPass {
  static char ID;
  myPass() : CallGraphSCCPass(ID) {}
  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
           AU.setPreservesAll();
           AU.addRequired<LoopInfo>();
  }
  virtual bool runOnSCC(CallGraphSCC &SCC) {
       for (CallGraphSCC::iterator CGNodeItr = SCC.begin(),
CFNodeItrE=SCC.end();CGNodeItr!=CGNodeItrE;++CGNodeItr)  }
                  const CallGraphNode *CGNode = *CGNodeItr;
                  Function *F = CGNode->getFunction();
                  if (!F->isDeclaration())
                               LoopInfo &LI =
getAnalysis<LoopInfo>(*F);
        }
       return false;
   }
  };
   char myPass::ID = 0;
   static RegisterPass<myPass> X("myPass", "This is my
pass", false, false);
}
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David Blaikie

2011-Nov-30 06:13 UTC

head link

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

On Tue, Nov 29, 2011 at 6:59 PM, Ryan Taylor <ryta1203 at gmail.com>
wrote:> The following code is causing an "UNREACHABLE executed!" and a
stack dump,
> any ideas?
The stack might be handy.
> namespace {
>   struct myPass : public CallGraphSCCPass {
>   static char ID;
>   myPass() : CallGraphSCCPass(ID) {}
>   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
>            AU.setPreservesAll();
>            AU.addRequired<LoopInfo>();
>   }
>   virtual bool runOnSCC(CallGraphSCC &SCC) {
>        for (CallGraphSCC::iterator CGNodeItr = SCC.begin(),
> CFNodeItrE=SCC.end();CGNodeItr!=CGNodeItrE;++CGNodeItr)  }
>                   const CallGraphNode *CGNode = *CGNodeItr;
>                   Function *F = CGNode->getFunction();
>                   if (!F->isDeclaration())
>                                LoopInfo &LI =
getAnalysis<LoopInfo>(*F);
>         }
>        return false;
>    }
>   };
>    char myPass::ID = 0;
>    static RegisterPass<myPass> X("myPass", "This is my
pass", false, false);
> }
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>

Devang Patel

2011-Nov-30 17:38 UTC

head link

[LLVMdev] Problem getting LoopInfo inside non-LoopPass

Ryan,

See http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-November/045423.html

-
Devang

On Nov 29, 2011, at 6:59 PM, Ryan Taylor wrote:
> The following code is causing an "UNREACHABLE executed!" and a
stack dump, any ideas?
> 
> namespace {
>   struct myPass : public CallGraphSCCPass {
>   static char ID;
>   myPass() : CallGraphSCCPass(ID) {}
>   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
>            AU.setPreservesAll();
>            AU.addRequired<LoopInfo>();
>   }
>   virtual bool runOnSCC(CallGraphSCC &SCC) {
>        for (CallGraphSCC::iterator CGNodeItr = SCC.begin(),
CFNodeItrE=SCC.end();CGNodeItr!=CGNodeItrE;++CGNodeItr)  }
>                   const CallGraphNode *CGNode = *CGNodeItr;
>                   Function *F = CGNode->getFunction();
>                   if (!F->isDeclaration()) 
>                                LoopInfo &LI =
getAnalysis<LoopInfo>(*F);
>         }
>        return false;
>    }
>   };
>    char myPass::ID = 0;
>    static RegisterPass<myPass> X("myPass", "This is my
pass", false, false);
> }
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Pankaj Gode

2011-Dec-01 05:32 UTC

head link

[LLVMdev] Problem getting LoopInfo inside non-LoopPass

In addition to the link below, please check for functions like
"llvm.debug.declare", "llvm.debug.value", as you will not
get LoopInfo for these.
 
Pankaj
 


________________________________
From: Devang Patel <dpatel at apple.com>
To: Ryan Taylor <ryta1203 at gmail.com> 
Cc: llvmdev at cs.uiuc.edu 
Sent: Wednesday, November 30, 2011 11:08 PM
Subject: Re: [LLVMdev] Problem getting LoopInfo inside non-LoopPass

Ryan,

See http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-November/045423.html

-
Devang

On Nov 29, 2011, at 6:59 PM, Ryan Taylor wrote:
> The following code is causing an "UNREACHABLE executed!" and a
stack dump, any ideas?
> 
> namespace {
>  struct myPass : public CallGraphSCCPass {
>  static char ID;
>  myPass() : CallGraphSCCPass(ID) {}
>  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
>            AU.setPreservesAll();
>            AU.addRequired<LoopInfo>();
>  }
>  virtual bool runOnSCC(CallGraphSCC &SCC) {
>        for (CallGraphSCC::iterator CGNodeItr = SCC.begin(),
CFNodeItrE=SCC.end();CGNodeItr!=CGNodeItrE;++CGNodeItr)  }
>                  const CallGraphNode *CGNode = *CGNodeItr;
>                  Function *F = CGNode->getFunction();
>                  if (!F->isDeclaration()) 
>                                LoopInfo &LI =
getAnalysis<LoopInfo>(*F);
>        }
>        return false;
>    }
>  };
>    char myPass::ID = 0;
>    static RegisterPass<myPass> X("myPass", "This is my
pass", false, false);
> }
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu        http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
_______________________________________________
LLVM Developers mailing list
LLVMdev at cs.uiuc.edu        http://llvm.cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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Ryan Taylor

2011-Dec-01 06:29 UTC

head link

[LLVMdev] Problem getting LoopInfo inside non-LoopPass

Thanks for the info. Curious, do you know if there is an opt that will put
all loops, including nested ones, in functions (ie each loop in it's own
function)? What I'm trying to do is create a way for each loop to have only
one exit. I want all loops to be single exit loops?

  I can write my own pass but I'd rather not. I think that if I can put
each loop into it's own function then call merge return that might do it.
Ideas?

On Thu, Dec 1, 2011 at 12:32 AM, Pankaj Gode <godepankaj at yahoo.com>
wrote:
> In addition to the link below, please check for functions like
> "llvm.debug.declare", "llvm.debug.value", as you will
not get LoopInfo for
> these.
>
> Pankaj
>
>
>  *From:* Devang Patel <dpatel at apple.com>
> *To:* Ryan Taylor <ryta1203 at gmail.com>
> *Cc:* llvmdev at cs.uiuc.edu
> *Sent:* Wednesday, November 30, 2011 11:08 PM
>
> *Subject:* Re: [LLVMdev] Problem getting LoopInfo inside non-LoopPass
>
> Ryan,
>
> See http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-November/045423.html
>
> -
> Devang
>
> On Nov 29, 2011, at 6:59 PM, Ryan Taylor wrote:
>
> > The following code is causing an "UNREACHABLE executed!" and
a stack
> dump, any ideas?
> >
> > namespace {
> >  struct myPass : public CallGraphSCCPass {
> >  static char ID;
> >  myPass() : CallGraphSCCPass(ID) {}
> >  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
> >            AU.setPreservesAll();
> >            AU.addRequired<LoopInfo>();
> >  }
> >  virtual bool runOnSCC(CallGraphSCC &SCC) {
> >        for (CallGraphSCC::iterator CGNodeItr = SCC.begin(),
> CFNodeItrE=SCC.end();CGNodeItr!=CGNodeItrE;++CGNodeItr)  }
> >                  const CallGraphNode *CGNode = *CGNodeItr;
> >                  Function *F = CGNode->getFunction();
> >                  if (!F->isDeclaration())
> >                                LoopInfo &LI =
getAnalysis<LoopInfo>(*F);
> >        }
> >        return false;
> >    }
> >  };
> >    char myPass::ID = 0;
> >    static RegisterPass<myPass> X("myPass", "This
is my pass", false,
> false);
> > }
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu        http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu        http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
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