[cfe-dev] '-fsave-optimization-record' and VS2015 built compiler

Hal Finkel via cfe-dev cfe-dev at lists.llvm.org
Thu Sep 7 08:53:57 PDT 2017


Hi again,

What version of the compiler are you using? I'm wondering if this was 
fixed by r311041+r311043.

  -Hal

On 09/07/2017 09:57 AM, ORiordan, Martin via cfe-dev wrote:
>
> Hi CFE-Devs,
>
> I had posted the following question on LLVM-Dev but it seems more 
> appropriate to CFE-Dev.  It appears that the temporary YAML file is 
> being left in the TMP directory and not promoted to its final intended 
> location.
>
> Thanks,
>
>             MartinO
>
> -------------
>
> Thanks Hal,
>
> Though the option is handled in the driver, I was not sure if this was 
> an LLVM implemented feature or a CLang implemented feature, and I know 
> the list does not like cross-posting a message ;-)
>
> And thanks too Brian:
>
> *From:*Brian Cain [mailto:brian.cain at gmail.com]
>
> That's pretty odd.  Can you rule out for sure that the files aren't 
> being written somewhere unexpected or that the other clang was built 
> against different sources?
>
> Yes you’re right, it appears to be in ‘c:\tmp\foo-XXXXXX.opt.yaml’, 
> though on Linux it is located in ‘./foo.opt.yaml’.  The sources for my 
> Linux and VS2015 builds are identical.
>
> So it would appear that the temporary files is being created but not 
> finalised – probably a CLang driver issue.  I’ll dig deeper and see 
> where this is going wrong and I’ll re-post this to CFE-Dev.
>
> Thanks again to both of you,
>
>             MartinO
>
> *From:*Hal Finkel [mailto:hfinkel at anl.gov]
> *Sent:* Thursday, September 7, 2017 3:37 PM
> *To:* ORiordan, Martin <martin.oriordan at intel.com 
> <mailto:martin.oriordan at intel.com>>; llvm-dev <llvm-dev at lists.llvm.org 
> <mailto:llvm-dev at lists.llvm.org>>
> *Subject:* Re: [llvm-dev] '-fsave-optimization-record' and VS2015 
> built compiler
>
> On 09/07/2017 09:10 AM, ORiordan, Martin via llvm-dev wrote:
>
> Not 100% if this is an LLVM question or a CLang question, though I 
> expect LLVM.
>
> On Linux, if I pass ‘-fsave-optimization-record’ to ‘clang’, then it 
> produces a ‘*.opt.yaml’ file.  However, the same thing run on Windows 
> using ‘clang’ built with VS2015 silently ignores this option.
>
> Is this a bug or is it intentional?  And if it is intentional, how can 
> I configure and build on Windows to enable this feature?
>
>
> Sounds like a bug (I've never tested on Windows). I suggest filing a 
> bug report. Also, in general, you'll have better luck with frontend 
> questions on cfe-dev.
>
>  -Hal
>
> Thanks,
>
>             MartinO
>
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-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

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