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On 12 October 2016 at 14:26, Sebastian Pop <sebpop.llvm at gmail.com> wrote: > Correct me if I misunderstood: you would be ok changing the > reference output to exactly match the output of "-O0 -ffp-contract=off". No, that's not at all what I said. Matching identical outputs to FP tests makes no sense because there's *a...

On 14 October 2016 at 15:50, Sebastian Pop <sebpop.llvm at gmail.com> wrote: > These 3 tests are passing with the following configurations: > -O3 -ffp-contract=off > -O3 -ffp-contract=on > -O0 -ffp-contract=off > -O0 -ffp-contract=on > > They are not passing at: > -Ofast -ffp-contract=on > -Ofast -ffp-contract=off Let...

On Fri, Oct 14, 2016 at 10:50 AM, Hal Finkel <hfinkel at anl.gov> wrote: > ----- Original Message ----- >> From: "Renato Golin" <renato.golin at linaro.org> >> To: "Sebastian Pop" <sebpop.llvm at gmail.com> >> Cc: "Hal Finkel" <hfinkel at anl.gov>, "Sebastian Paul Pop" <s.pop at samsung.com>, "llvm-dev" <llvm-dev at lists.llvm.org>, >> "Matthias Braun" <matze at braunis.de>, "Clang Dev" <cfe-...

On Tue, Oct 11, 2016 at 10:39 PM, Sebastian Pop <sebpop.llvm at gmail.com> wrote: > On Tue, Oct 11, 2016 at 10:20 PM, Hal Finkel <hfinkel at anl.gov> wrote: >> ----- Original Message ----- >>> From: "Renato Golin" <renato.golin at linaro.org> >>> To: "Sebastian Pop" <sebpop.llvm at gmail.c...

..." <llvm-dev at lists.llvm.org>, "Matthias Braun" >> <matze at braunis.de>, "Clang Dev" <cfe-dev at lists.llvm.org>, "nd" <nd at arm.com>, "Abe Skolnik" <a.skolnik at samsung.com>, >> "Sebastian Pop" <sebpop.llvm at gmail.com> >> Sent: Wednesday, October 12, 2016 9:16:39 AM >> Subject: Re: [test-suite] making polybench/symm succeed with "-Ofast" and "-ffp-contract=on" >> >> On 12 October 2016 at 15:05, Hal Finkel <hfinkel at anl.gov> wrote: >>...

On Thu, Oct 20, 2016 at 11:12 AM, Renato Golin <renato.golin at linaro.org> wrote: > On 20 October 2016 at 16:05, Sebastian Pop <sebpop.llvm at gmail.com> wrote: >> Setting FP_ABSTOLERANCE=1e-5, the two tests are passing >> when compiled with -Ofast for the following relative tolerance: >> >> polybench/linear-algebra/kernels/symm, FP_TOLERANCE=1e-10 >> polybench/linear-algebra/solvers/gramschmidt, F...

..., Sep 19, 2018 at 4:58 AM Venkataramanan Kumar < venkataramanan.kumar.llvm at gmail.com> wrote: > Hi, > > I tired to see when this behavior changed in LLVM. > It seems to start from. > --snip-- > commit 95e5d37d5868ebde2302bc302c1e0af407c5646d > Author: Sebastian Pop <sebpop at gmail.com> > Date: Tue Mar 6 21:55:59 2018 +0000 > > DA: remove uses of GEP, only ask SCEV > --snip-- > > https://reviews.llvm.org/D35430 > Review URL says "GEP" based approach was wrong for multidimensional array > references. The LLVM-DA now uses SCEV...

----- Original Message ----- > From: "Renato Golin" <renato.golin at linaro.org> > To: "Sebastian Pop" <sebpop.llvm at gmail.com> > Cc: "Hal Finkel" <hfinkel at anl.gov>, "Sebastian Paul Pop" <s.pop at samsung.com>, "llvm-dev" <llvm-dev at lists.llvm.org>, > "Matthias Braun" <matze at braunis.de>, "Clang Dev" <cfe-dev at l...

On 29 September 2016 at 19:21, Sebastian Pop <sebpop.llvm at gmail.com> wrote: > Cumulating errors is a bad idea. > As others have suggested, please prepare a patch that disables > fp-contract on those testcases. No, please, let's not disable things just because they fail. If the test is not meaningful or if the results are not good...

On Wed, Oct 12, 2016 at 10:53 AM, Hal Finkel <hfinkel at anl.gov> wrote: > I don't think that Clang/LLVM uses it by default on x86_64. If you're using -Ofast, however, that would explain it. I recommend looking at -O3 vs -O0 and make sure those are the same. -Ofast enables -ffast-math, which can legitimately cause differences. > The following tests pass at "-O3" and

----- Original Message ----- > From: "Hal Finkel via llvm-dev" <llvm-dev at lists.llvm.org> > To: "Sebastian Pop" <sebpop.llvm at gmail.com> > Cc: "Sebastian Paul Pop" <s.pop at samsung.com>, "llvm-dev" <llvm-dev at lists.llvm.org>, "Matthias Braun" > <matze at braunis.de>, "Clang Dev" <cfe-dev at lists.llvm.org>, "nd" <nd at arm.com...

On Mon, Oct 10, 2016 at 5:02 PM, Hal Finkel <hfinkel at anl.gov> wrote: > ----- Original Message ----- >> From: "Sebastian Pop" <sebpop.llvm at gmail.com> >> To: "Hal Finkel" <hfinkel at anl.gov> >> Cc: "Sebastian Paul Pop" <s.pop at samsung.com>, "llvm-dev" <llvm-dev at lists.llvm.org>, "Matthias Braun" >> <matze at braunis.de>, "Clang Dev&qu...

Hi Sebpop, Thanks for your explanation. I noticed that Polly would finally run the SROA pass to transform these load/store instructions into scalar operations. Is it possible to run such a pass before polly-dependence analysis? Star Tan At 2013-08-15 21:12:53,"Sebastian Pop" <sebpop at gmail...

On 12 October 2016 at 13:04, Sebastian Pop <sebpop.llvm at gmail.com> wrote: > The other problem is the reference output does not match > at "-O0 -ffp-contract=off". It might be that the reference output was recorded > at "-O3 -ffp-contract=off". I think that this hides either a compiler > bug or a test bug. Ah,...

...s that polly intentionally schedules for the data dependence analysis. If you remove the data references before polly runs, you would miss them in the dependence graph: that could lead to incorrect transforms. On Thu, Aug 15, 2013 at 7:28 PM, Star Tan <tanmx_star at yeah.net> wrote: > Hi Sebpop, > > Thanks for your explanation. > > I noticed that Polly would finally run the SROA pass to transform these > load/store instructions into scalar operations. Is it possible to run such > a pass before polly-dependence analysis? > > Star Tan > > At 2013-08-15 21:12:5...

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On Fri, Oct 14, 2016 at 6:10 PM, Hal Finkel <hfinkel at anl.gov> wrote: >> polybench/linear-algebra/kernels/symm, FP_ABSTOLERANCE=1e1 >> polybench/linear-algebra/solvers/gramschmidt, FP_ABSTOLERANCE=1e0 >> What should be a good relative tolerance to set for these two tests? > > What's the minimum relative tolerance that you need for them to pass? Setting

Renato, I see that you were not on CC to the following email thread. I would appreciate if you could provide some guidance on how to fix the test-suite. On Mon, Oct 24, 2016 at 3:08 PM, Sebastian Pop <sebpop at gmail.com> wrote: > On Thu, Oct 20, 2016 at 5:59 PM, Renato Golin <renato.golin at linaro.org> wrote: >> So, let's separate the FP_CONTRACT from the FAST_MATH problems, and solve them separately, in separate patches. > > Agreed. > >> >> We may want to a...

On 12 October 2016 at 05:35, Sebastian Pop <sebpop.llvm at gmail.com> wrote: > polybench/linear-algebra/solvers/gramschmidt/ exposes the same problems as symm. > It does not match the reference output at -O0 -ffp-contract=off, > and it only passes all elements comparisons for FP_ABSTOLERANCE=1 for > "-Ofast" vs. "-O0 -...

On Fri, May 19, 2017 at 4:32 PM, Daniel Berlin via llvm-dev <llvm-dev at lists.llvm.org> wrote: > i think you'd have to write some idiom recognizer here. The ones we have > won't do it. > > I guess my other question would be how commonly this happens. If it's common > and matters a lot, awesome. > I wouldn't do it just to fix SPEC :P > > (people who