[LLVMbugs] Trouble Building llvm-gcc

[Chris Lattner]

On Sun, 5 Nov 2006, Bill Wendling wrote:
> Is anyone getting an ICE while building LLVM-GCC on a Mac? I reduced
> it down at least one case which fails. Here's the code:

I'm not sure.  llvm-gcc doesn't build for me at all on darwin-x86.  Evan 
is investigating.

-Chris

> typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
> typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
> typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__
> (__pointer__)));
>
> int read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr
> base,
>                                   const unsigned char *p,
> _Unwind_Ptr *val)
> {
>   union unaligned
>   {
>     unsigned u8 __attribute__ ((mode (DI)));
>   } __attribute__((__packed__));
>   const union unaligned *u = (const union unaligned *) p;
>   _Unwind_Internal_Ptr result;
>
>   switch (encoding & 0x0f)
>     {
>     case 0x00:
>     case 0x01:
>     case 0x09:
>       {
>         _Unwind_Sword tmp;
>         p = read_sleb128 (p, &tmp);
>       }
>     case 0x02:
>     case 0x03:
>     case 0x04:
>       result = u->u8;
>     }
>
>   if (result != 0)
>     result += ((encoding & 0x70) == 0x10
>                ? (_Unwind_Internal_Ptr) u : base);
> }
>
> This occurs when it recompiles the llvm-gcc source (so when it's
> compiled with xgcc), making it crazy to figure out what's happening.
> Has anyone seen this before or might have a clue what's going on?
>
> Thanks!
> -bw
>
> _______________________________________________
> LLVMbugs mailing list
> LLVMbugs at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
>

-Chris

-- 
http://nondot.org/sabre/
http://llvm.org/