nofib/spectral/hartel/transform is crashing with -fllvm (LLVM 2.7)

[simonmar]

From the i386/Linux nightly builder:

==nofib== transform: time to run transform follows...
../../../runstdtest/runstdtest ./transform  -o1 transform.stdout -o1 transform.stdout  -ghc-timing     500;   ../../../runstdtest/runstdtest ./transform  -o1 transform.stdout -o1 transform.stdout  -ghc-timing     500;   ../../../runstdtest/runstdtest ./transform  -o1 transform.stdout -o1 transform.stdout  -ghc-timing     500;   ../../../runstdtest/runstdtest ./transform  -o1 transform.stdout -o1 transform.stdout  -ghc-timing     500;   ../../../runstdtest/runstdtest ./transform  -o1 transform.stdout -o1 transform.stdout  -ghc-timing     500;
Command exited with non-zero status 139
0.00user 0.00system 0:00.00elapsed 133%CPU (0avgtext+0avgdata 6192maxresident)k
0inputs+8outputs (0major+635minor)pagefaults 0swaps
././transform 500 < /dev/null
**** expected exit status 0 not seen ; got 139
././transform 500 < /dev/null
expected stderr not matched by reality
--- /playpen/tmp/no_stderr21429	2012-01-23 06:20:50.000000000 +0000
+++ /playpen/tmp/runtest21429.2	2012-01-23 06:20:50.000000000 +0000
@@ -0,0 +1 @@
+Segmentation fault

[dterei]

OK I'll take a look when I get time. Thanks for letting me know.

[dterei]

Is this still happening? I can't replicate locally. What LLVM version is it? I've tested with 2.7, 2.8 and 3.0, unless 2.9 has a problem...

[simonmar]

Yup, still happening here.

$ uname -a
Linux cam-02-unx 2.6.32-28-generic-pae #55-Ubuntu SMP Mon Jan 10 22:34:08 UTC 2011 i686 GNU/Linux
$ llvmc --version
Low Level Virtual Machine (http://llvm.org/):
  llvm version 2.7 ( 2.7-0ubuntu1)
  Optimized build.
  Built Apr 28 2010 (14:16:19).
  Host: i386-pc-linux-gnu
  Host CPU: pentium4

  Registered Targets:
    (none)

This build.mk should do it:

GhcStage1HcOpts = -H64m -O
GhcStage2HcOpts = -H64m -O2
GhcLibWays = v
GhcLibHcOpts = -H32m -O2 -dcore-lint
StripLibraries = YES
SplitObjs = YES

SRC_HC_OPTS += 
EXTRA_PACKAGES = 
HaveLibGmp = NO

NoFibHcOpts =  -rtsopts -O2 -fllvm
NoFibSubDirs = imaginary spectral real
NoFibWays =    

[dterei]

OK can reproduce. This only happens with LLVM 2.7. any higher versions are fine. It's either LLVM's fault or the manglers fault. Either way I'm not going to fix it given LLVM 3.0 is the current release and by the time this fix was released in GHC there is a good chance LLVM 3.1 will be out. I think my time is better spent on other things than trying to support 4 llvm versions. Could you upgrade LLVM on the test machines please?

I'll have GHC issue a warning or error though if LLVM is an unsupported version.

[simonmar]

Ok, thanks for looking at it.