Two days old build breakage on i386.

[Johan Tibell]

Herbert pushed my revert for me a minute ago. Everyone should be good once
they sync.


On Thu, Jun 26, 2014 at 2:51 PM, Johan Tibell <johan.tibell at gmail.com>
wrote:

> I guess you don't have 04dd7cb3423f1940242fdfe2ea2e3b8abd68a177 (which I
> pushed this morning) which is fine. You should be in a good state now when
> d8abf85f8ca176854e9d5d0b12371c4bc402aac3 is reverted.
>
>
> On Thu, Jun 26, 2014 at 2:49 PM, Simon Peyton Jones <simonpj at microsoft.com
> > wrote:
>
>>  git revert d8abf85f8ca176854e9d5d0b12371c4bc402aac3
>>
>> [master f958079] Revert "Add more primops for atomic ops on byte arrays"
>>
>> 23 files changed, 86 insertions(+), 1016 deletions(-)
>>
>> rewrite compiler/nativeGen/CPrim.hs (62%)
>>
>> delete mode 100644 libraries/ghc-prim/cbits/atomic.c
>>
>> delete mode 100644 testsuite/tests/concurrent/should_run/AtomicPrimops.hs
>>
>> delete mode 100644
>> testsuite/tests/concurrent/should_run/AtomicPrimops.stdout
>>
>> HEAD $ git revert 04dd7cb3423f1940242fdfe2ea2e3b8abd68a177
>>
>> fatal: bad object 04dd7cb3423f1940242fdfe2ea2e3b8abd68a177
>>
>> HEAD $
>>
>> What now?
>>
>> Simon
>>
>>
>>
>> *From:* Johan Tibell [mailto:johan.tibell at gmail.com]
>> *Sent:* 26 June 2014 13:25
>> *To:* Simon Peyton Jones
>> *Cc:* Karel Gardas; ghc-devs
>> *Subject:* Re: Two days old build breakage on i386.
>>
>>
>>
>> Just to make sure this is the same breakage, are you on an i386 Windows
>> machine? If so git revert d8abf85f8ca176854e9d5d0b12371c4bc402aac3
>> and 04dd7cb3423f1940242fdfe2ea2e3b8abd68a177 to get unstuck.
>>
>>
>>
>> On Thu, Jun 26, 2014 at 2:13 PM, Simon Peyton Jones <
>> simonpj at microsoft.com> wrote:
>>
>>  Aaaargh!  Once again the Windows build is broken.  I am utterly stalled.
>>
>> Moreover -fregs-graph and -fregs-iterative now *silently* do nothing.  At
>> least they should elicit warnings saying that they are disabled pending the
>> fix to X and Y.
>>
>> Please can someone bisect to find out which patch is the culprit?
>>
>> I wish we had a more systematic way to find this out. I hate being the
>> main person who gets stuck because some unrelated change has broken the
>> Windows build.  (Thanks for Karel, who got to it a day before me.)
>>
>> Thanks
>>
>> Simon
>>
>>
>> | -----Original Message-----
>> | From: ghc-devs [mailto:ghc-devs-bounces at haskell.org] On Behalf Of Karel
>> | Gardas
>> | Sent: 26 June 2014 09:56
>> | To: ghc-devs; Johan Tibell
>> | Subject: Two days old build breakage on i386.
>> |
>> |
>> | Hello,
>> |
>> | builders running on i386 building for this platform caught issue which
>> | shows as a build breakage:
>> |
>> | ghc-stage1: panic! (the 'impossible' happened)
>> | (GHC version 7.9.20140624 for i386-unknown-linux):
>> | RegAllocLinear.allocRegsAndSpill: no spill candidates
>> | allocating vreg: VirtualRegI n1Q6
>> | assignment: [(c1PV,InMem 2),(n1Q5,InBoth (RealRegSingle 3)
>> | 0),(n1Q6,InMem 1),(n1Q7,InMem 3),(n1Q9,InReg (RealRegSingle 2))]
>> | freeRegs: FreeRegs 4282318848
>> | initFreeRegs: FreeRegs 4282318861
>> | Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
>> | make[1]: ***
>> | [libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o] Error 1
>> | libraries/ghc-prim/ghc.mk:4: recipe for target
>> | 'libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o' failed
>> |
>> | Have a look for example on linux-i386 buildot log here:
>> | http://haskell.inf.elte.hu/builders/validator1-linux-x86-head/18/7.html
>> |
>> | Anyway, this happens on Linux, FreeBSD and Solaris buildbots on i386 so
>> | it's OS independent and probably 32bit/i386 platform specific and it's
>> | two days old breakage now. The last two night builds fail on all
>> | mentioned buildbots. I'm not sure but perhaps:
>> |
>> | commit d8abf85f8ca176854e9d5d0b12371c4bc402aac3
>> | Author: Johan Tibell <johan.tibell at gmail.com>
>> | Date:   Mon Jun 9 11:43:21 2014 +0200
>> |
>> | triggers that issue? I'm not claiming that the commit is actual culprit,
>> | this may be just recently un-hidden issue in linear regs allocator on
>> | i386!
>> |
>> | Thanks!
>> | Karel
>>
>> | _______________________________________________
>> | ghc-devs mailing list
>> | ghc-devs at haskell.org
>> | http://www.haskell.org/mailman/listinfo/ghc-devs
>>
>>
>>
>
>
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