Two days old build breakage on i386.

[Johan Tibell]

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
>
> | _______________________________________________
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> | ghc-devs at haskell.org
> | http://www.haskell.org/mailman/listinfo/ghc-devs
>
>
>
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