llvm dev - Jun 2018 - How to include a opt pass in clang driver

Hi Eli,

I have tried that:

static void registerMyPass(const PassManagerBuilder &,
                                llvm::legacy::PassManagerBase &PM) {
       PM.add(new MyPass());
}

static RegisterStandardPasses
    RegisterMyPass(PassManagerBuilder::EP_OptimizerLast,
                          registerMyPass);

It still couldn't find my pass.


Regards,
Soham Sinha
PhD Student, Department of Computer Science
Boston University


On Mon, Jun 25, 2018 at 3:58 PM Friedman, Eli <efriedma at codeaurora.org>
wrote:
> On 6/25/2018 1:38 PM, Soham Sinha via llvm-dev wrote:
> > Hello,
> >
> > I have written a pass for the IR and I can run it with opt -load
> > lib/LLVMMyPass.so -mypass -myarguments -S -o output.ll < output.bc
> >
> > I have registered my pass with the following code:
> > static RegisterPass<MyPass>
> > X("mypass", "MyPass Pass (with getAnalysisUsage
implemented)");
> >
> > How do I include the same pass in the clang driver. I tried running
> > the pass:
> >
> > clang output.c -o output -Xclang -load -Xclang lib/LLVMMyPass.so
> > -mypass -myarguments
> >
> > However, the pass is not being run as I cannot see output from my
> > pass. What is the standard way to do it?
>
> See RegisterStandardPasses in llvm/Transforms/IPO/PassManagerBuilder.h .
>
> -Eli
>
> --
> Employee of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
> Foundation Collaborative Project
>
>
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On 6/25/2018 2:03 PM, Soham Sinha wrote:
> Hi Eli,
>
> I have tried that:
>
> static void registerMyPass(const PassManagerBuilder &,
> llvm::legacy::PassManagerBase &PM) {
>        PM.add(new MyPass());
> }
>
> static RegisterStandardPasses
>     RegisterMyPass(PassManagerBuilder::EP_OptimizerLast,
>                           registerMyPass);
OptimizerLast doesn't run unless you turn on optimizations (-O2). Maybe 
that's the issue?

-Eli

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
Foundation Collaborative Project

Yeah it worked. Thank you so much! Correct command

clang output.c -o output -Xclang -load -Xclang lib/LLVMMyPass.so -mllvm
-myarguments

Regards,
Soham Sinha
PhD Student, Department of Computer Science
Boston University


On Mon, Jun 25, 2018 at 4:21 PM Friedman, Eli <efriedma at codeaurora.org>
wrote:
> On 6/25/2018 2:03 PM, Soham Sinha wrote:
> > Hi Eli,
> >
> > I have tried that:
> >
> > static void registerMyPass(const PassManagerBuilder &,
> > llvm::legacy::PassManagerBase &PM) {
> >        PM.add(new MyPass());
> > }
> >
> > static RegisterStandardPasses
> >     RegisterMyPass(PassManagerBuilder::EP_OptimizerLast,
> >                           registerMyPass);
>
> OptimizerLast doesn't run unless you turn on optimizations (-O2). Maybe
> that's the issue?
>
> -Eli
>
> --
> Employee of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
> Foundation Collaborative Project
>
>
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