similar to: Need help reproducing a bug

> On Apr 18, 2018, at 9:11 AM, Roman Lebedev via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > On Wed, Apr 18, 2018 at 5:45 PM, Michael Zolotukhin via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> Hi, >> >> Recently I committed a change (r330175) that passed all my testing, but >> failed on several bots. Namely, these are the failed ones:

On Wed, Apr 18, 2018 at 5:45 PM, Michael Zolotukhin via llvm-dev <llvm-dev at lists.llvm.org> wrote: > Hi, > > Recently I committed a change (r330175) that passed all my testing, but > failed on several bots. Namely, these are the failed ones: > http://lab.llvm.org:8011/builders/clang-with-thin-lto-ubuntu/builds/9803 >

Thanks everyone! What are the best tools/techniques to expose such non-deterministic behavior? My hope is to reproduce it on a smaller test (e.g. use some sanitizer and thus make the compiler *fail* when building the test) - Currently these failures only tell me “there is some bug in your code” without any hints where to look for it. Michael > On Apr 18, 2018, at 9:18 PM, Steven Wu

Hi Michael, Last year I had a problem with reproducibility that I detected in the generated assembly for the out-of-tree target I was working on that seemed like non-deterministic code generation. There was nothing incorrect in the alternative code being emitted, but it was making me nervous that it was different at all. After some investigation it turned out to be a consequence of

Hi This question is far less simple than the title suggests, please read carefully, thanks. I have 2 sets of data, both read into R >data1<-read.table ("1.txt", header=T, sep="\t") >data2<-read.table ("2.txt", header=T, sep="\t") >data1 Taxon stage1 stage2 stage3 stage4 T1 0 0 1 1 T2 0

FYI, I just successfully performed a 3-stage bootstrap with stage2/stage3 object file comparison on x86_64-apple-darwin16 for llvm/clang/clang-tools-extra/compiler-rt/libcxx/openmp/polly using our custom fink packaging scripts with the -DLLVM_REVERSE_ITERATION:BOOL=ON cmake option. There were no stage2/stage3 object file comparison failures or test suite regressions. I do have one question

On Sun, Jul 9, 2017 at 1:26 PM, Daniel Berlin <dberlin at dberlin.org> wrote: > > > On Sun, Jul 9, 2017 at 9:19 AM, Jack Howarth via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> >> FYI, I just successfully performed a 3-stage bootstrap with >> stage2/stage3 object file comparison on x86_64-apple-darwin16 for >>

Do any of the current build bots for llvm.org perform 3-stage bootstraps with file comparison of the stage2 and stage3 object files and generated headers? On x86_64-apple-darwin16 using the fink projects llvm packaging methodology (crafted by David Fang), I am seeing non-deterministic file comparison failures in current trunk that goes back as far as r296837.

On Mon, Apr 19, 2010 at 4:52 PM, Óscar Fuentes <ofv at wanadoo.es> wrote: > The third stage is for comparing the output of clang (as compiled by > gcc) against clang (as compiled by clang). The whole process is: > > Stage 1: build clang with gcc > > Stage 2: build clang with the clang created by gcc > > Stage 3: build clang with the clang created by clang. > >

On Mon, Oct 28, 2013 at 5:53 PM, Richard Smith <richard at metafoo.co.uk>wrote: > On Mon, Oct 28, 2013 at 5:13 PM, "C. Bergström" <cbergstrom at pathscale.com>wrote: > >> On 10/29/13 07:01 AM, Richard Smith wrote: >> >>> >>> [As an aside: I use libc++ for my Clang development (on Ubuntu Linux), >>> and it works for me (tm). This

Dear Tobias, Thank you very much for your very helpful advice. Yes, -debug-pass and -time-passes are two very useful and powerful options when evaluating the compile-time of each compiler pass. They are exactly what I need! With these options, I can step into details of the compile-time overhead of each pass. I have finished some preliminary testing based on two randomly selected files from

I''ve decided to take the plunge and go with Gentoo for my rails development and test box. I figure the easy of maintenance is worth the setup hassles. Anyway, I''m followin the instructions on the Gentoo web site. I''ve selected the ..''i686'' 2.6 kernel for my 700mhz amd processor, and choosen stage3 install option from CD. I''m now at the the

On 04/30/2013 04:13 PM, Star Tan wrote: > Hi all, [...] > How could I find out where the time is spent on between two adjacent Polly passes? Can anyone give me some advice? Hi Star Tan, I propose to do the performance analysis using the 'opt' tool and optimizing LLVM-IR, instead of running it from within clang. For the 'opt' tool there are two commands that should help

Hi, I have the panel data of income statement of several banks. The date 9803 means 1998-Q1, 9806 means 1998-Q2, etc. I transform the date code to 1 (for 1998Q1), 2 (for 1998Q2), ...., 16 (for 2011Q4) where 1, 2, .... are placed in Col1. Now the income statement of a specific quarter is actually the accumulation from the beginning of the year. For example, the cost data of 1999Q3 is the

I have tried to use isolinux 2.05, and I am running into a problem where it will not boot. I have previously used version 1.66, and the older version works just fine. Changing nothing except dropping the new version in does not work. Below is all of the relevant info, I believe. This occurs on multiple machines with different BIOS. I am currently in process of doing a binary search to find the

Dear all, I would like to multiply two matrixes with the different dimension column by column. Let make an example: If I have two matrixes "X" and "Y"as follow: X<- matrix(1:12, nrow=4, ncol=3, dimnames=list(c("A","B","C","D"), c("stage1","stage2","stage3"))) Y<- matrix(1:28, nrow=4, ncol=7,

> > Actually its [configure-stage3-intl] where its hanging. This can easily be due to inline FP math in the stdlib headers. For example - I had to maintain slightly hacked mingw32 headers which do not contain inline FP assembler, otherwise at least libstdc++ configure would hang. No idea about cygwin though. --- With best regards, Anton Korobeynikov Faculty of Mathematics and

On 10/29/13 07:01 AM, Richard Smith wrote: > > [As an aside: I use libc++ for my Clang development (on Ubuntu Linux), > and it works for me (tm). This is with libstdc++ providing the ABI > pieces, rather than libc++abi or libcxxrt, though.] libc++ "works" for us as well, but it can't self host. I don't know if your "works" and my definition of works is

On 26/01/15 15:16, Paul Littlefield wrote: > On 26/01/15 15:08, Rowland Penny wrote: >> Yes, set up a new DC with your new OS and join this to the domain, >> once up and running, transfer the seven (yes, there are 7) FSMO roles >> to the new DC. Once everything is running ok, turn off the old DC and >> remove *all* mention of it from the domain. > > Hi Rowland

Hello fellow LLVMers and Clangstas, We want to make Clang great, and we need your help! Helping is easy: just build Clang on your platform and start using it as your main compiler for LLVM and Clang development. Much of the Clang team has been living on Clang for at least several weeks already, and we've found it to be quite stable for development. If you run into problems---poor