http://hackage.haskell.org/trac/ghc/wiki/Commentary/Compiler/Backends/LLVM/Installing

instance Show LlvmCallConvention where
show CC_Ccc = “ccc”
– show CC_Fastcc = “cc 10″
– show CC_Fastcc = “fastcc”
show CC_Fastcc = show (CC_Ncc 10)
show CC_Coldcc = “coldcc”
show (CC_Ncc i) = “cc ” ++ (show i)
show CC_X86_Stdcc = “x86_stdcallcc”

However, even simplest program build with -fllvm segfaults:

█▓▒░tener@laptener░▒▓██▓▒░ wto mar 23 03:46:11
~/dokumenty/programowanie-wlasne/haskell/sorting/ ghc –make hello -fforce-recomp && ./hello
[1 of 1] Compiling Main ( hello.hs, hello.o )
Linking hello …
hi

█▓▒░tener@laptener░▒▓██▓▒░ wto mar 23 03:45:58
~/dokumenty/programowanie-wlasne/haskell/sorting/ $GHC613BIN –make hello -fforce-recomp && ./hello
[1 of 1] Compiling Main ( hello.hs, hello.o )
Linking hello …
hi

Output of “–info”:

$GHC613BIN –info
[("Project name","The Glorious Glasgow Haskell Compilation System")
,("Project version","6.13.20100321")
,("Booter version","6.12.1")
,("Stage","2")
,("Have interpreter","YES")
,("Object splitting","YES")
,("Have native code generator","YES")
,("Have llvm code generator","YES")
,("Support SMP","YES")
,("Unregisterised","NO")
,("Tables next to code","NO")
,("Win32 DLLs","")
,("RTS ways","l debug thr thr_debug thr_l thr_p dyn debug_dyn thr_dyn thr_debug_dyn")
,("Leading underscore","NO")
,("Debug on","False")
,("LibDir","/home/tener/dokumenty/programowanie-wlasne/haskell/llvm-ghc-backend/ghc/inplace/lib")
]

█▓▒░tener@laptener░▒▓██▓▒░ wto mar 23 03:46:07
~/dokumenty/programowanie-wlasne/haskell/sorting/ $GHC613BIN –make hello -fllvm -fforce-recomp && ./hello
[1 of 1] Compiling Main ( hello.hs, hello.o )
Linking hello …
zsh: segmentation fault ./hello

I tried gdb but didn’t learned much:

$ gdb hello
GNU gdb (GDB) 7.0.1
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type “show copying”
and “show warranty” for details.
This GDB was configured as “i686-pc-linux-gnu”.
For bug reporting instructions, please see:
…
Reading symbols from /home/tener/dokumenty/programowanie-wlasne/haskell/sorting/hello…done.
(gdb) r
Starting program: /home/tener/dokumenty/programowanie-wlasne/haskell/sorting/hello
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x0804a89b in __stginit_ZCMain ()
(gdb)

Any clues what’s wrong?

./darcs-all get
warning: adding –partial, to override use –complete
warning: . already present; omitting
== running darcs get –partial http://darcs.haskell.org/ghc-tarballs ghc-tarballs
Converting old-fashioned repository to hashed format…
*******************************************************************************
Fetching a hashed repository would be faster. Perhaps you could persuade
the maintainer to run darcs optimize –upgrade with darcs 2.4.0 or higher?
*******************************************************************************
No checkpoint.
Writing inventory 1 done, 0 queued.

—

After this, no more output is generated – darcs-all seems to hang on instruction:
> darcs get –partial http://darcs.haskell.org/ghc-tarballs/ ghc-tarballs

Any ideas?

hunk ./compiler/llvmGen/Llvm/Types.hs 527
- show CC_Fastcc = “fastcc”
+ show CC_Fastcc = show (CC_Ncc 10)

I believe David had patched the “fastcc” calling convention directly in LLVM. However, now his patched fastcc is a separate calling convention now in LLVM-svn, `cc 10”. The above diff simply replaces how he prints his CC_Fastcc with the new calling convention (cc 10).