[llvm-testresults] buildbot failure in llvm on llvm-gcc-x86_64-linux-selfhost

[Chris Lattner]

On Jan 9, 2011, at 9:43 PM, Evan Cheng wrote:

> That didn't seem to help. :(

I've disabled all of the commits that were included in this build:
http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost/builds/554

Still no go.  I'm pretty sure that the current part is a Jakob issue.  The llvm-gcc-i386-linux-selfhost has been consistently failing.  Here's the series of events as I see it:

Build 554: has r123086,7,9.  These introduce a build failure causing an assertion:
Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.

Build 555: has 90,91.  These fix the build failure, but there is still a miscompile.  With the miscompile I get a *stage 2* miscomparison of sched-vis.o

Build 556: Has a strongphi patch, a clang patch, and a bunch of Jakob patches.  With these patches we still have a sched-vis.o miscompare, but now it is in *stage 1*, which is earlier.

Build 582 and other recent ones: I've disabled the patches from r123086,7,9 because I assume that they either include or expose a latent miscompile that the fixes in 555 weren't enough to cover for.  Despite that, we still have the sched-vis.o in *stage 1*.

Jakob, are you sure that none of the patches in 556 could have caused an issue?  While I agree that there is weirdness on some builders, the llvm-gcc-i386-linux-selfhost builder has been really consistent.

-Chris


> 
> Evan
> 
> On Jan 9, 2011, at 3:56 PM, Chris Lattner <clattner at apple.com> wrote:
> 
>> 
>> On Jan 9, 2011, at 3:21 PM, Jakob Stoklund Olesen wrote:
>> 
>>> 
>>> On Jan 9, 2011, at 3:16 PM, buildbot at google1.osuosl.org wrote:
>>> 
>>>> The Buildbot has detected a new failure of llvm-gcc-x86_64-linux-selfhost on llvm.
>>>> Full details are available at:
>>>> http://google1.osuosl.org:8011/builders/llvm-gcc-x86_64-linux-selfhost/builds/372
>>>> 
>>>> Buildbot URL: http://google1.osuosl.org:8011/
>>>> 
>>>> Buildslave for this Build: osu7
>>>> 
>>>> Build Reason: 
>>>> Build Source Stamp: 123130
>>>> Blamelist: chandlerc,lattner,stoklund
>>>> 
>>>> BUILD FAILED: failed compile.llvm-gcc.stage1
>>> 
>>> This is still the bootstrap comparison failure, I think there is still some non-stable code generation somewhere.
>>> 
>>> None of the patches in this build should have any functional change.
>>> 
>>> I'll be watching this builder.
>> 
>> r123144 disabled part of the memset formation stuff.  Lets see if that helps.  All of this depends on alias analysis etc, so latent bugs can definitely be exposed...
>> 
>> -Chris
>> 
>> 
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