[llvm-dev] target triple in 3.8

[Hal Finkel via llvm-dev]

You also need to actually set the target cpu.

 -Hal

----- Original Message -----
> From: "Mehdi Amini via llvm-dev" <llvm-dev at lists.llvm.org>
> To: "Frank Winter" <fwinter at jlab.org>
> Cc: "LLVM Dev" <llvm-dev at lists.llvm.org>
> Sent: Friday, February 19, 2016 2:28:11 PM
> Subject: Re: [llvm-dev] target triple in 3.8
> 
> Have you added the TTI as I showed? It is not clear from you excerpt
> below.
> 
> --
> Mehdi
>  
> 
> 
> > On Feb 19, 2016, at 12:24 PM, Frank Winter <fwinter at jlab.org>
> > wrote:
> > 
> > I added your suggestion and am using this now
> > 
> > llvm::legacy::FunctionPassManager *functionPassManager = new
> > llvm::legacy::FunctionPassManager(Mod);
> > 
> > llvm::PassRegistry &registry =
> > *llvm::PassRegistry::getPassRegistry();
> > initializeScalarOpts(registry);
> > 
> > functionPassManager->add( new
> > llvm::TargetLibraryInfoWrapperPass(llvm::TargetLibraryInfoImpl(targetMachine->getTargetTriple()))
> > );
> > 
> > 
> > still,
> > 
> > LV: The Widest register is: 32 bits.
> > 
> > 
> > so, unfortunately no change.
> > 
> > If I dump the Module, it starts with:
> > 
> > ; ModuleID = 'module'
> > target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
> > 
> > 
> > Does this datalayout look good for x86-64 AVX ?
> > 
> > 
> > Frank
> > 
> > 
> > 
> > On 02/19/2016 03:14 PM, Mehdi Amini wrote:
> >> Do you have the TTI in your pass manager?
> >> 
> >> Something like:
> >> 
> >>     // Add the TTI (required to inform the vectorizer about
> >>     register size for
> >>     // instance)
> >>     PM.add(createTargetTransformInfoWrapperPass(TM->getTargetIRAnalysis()));
> >> 
> >> Also, are you populating the pass manager using the
> >> passmanagerbuilder? You still need the TLI:
> >> 
> >>     // Populate the PassManager
> >>     PassManagerBuilder PMB;
> >>     PMB.LibraryInfo = new
> >>     TargetLibraryInfoImpl(TM->getTargetTriple());
> >> ....
> >> 
> >> 
> >> Or without the PassManagerBuild, something like:
> >> 
> >>     PM.add(new
> >>     TargetLibraryInfoWrapperPass(TargetLibraryInfoImpl(TM->getTargetTriple())));
> >> 
> >> 
> > 
> > 
> 
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-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory