Issue 5689

[James Miller]

On 16 March 2012 14:36, Daniel Murphy <yebblies at nospamgmail.com> wrote:
> "James Miller" <james at aatch.net> wrote in message
> news:mailman.707.1331841671.4860.digitalmars-d at puremagic.com...
>> Out of curiosity, what does -profile do that could cause this bug?
>> Seems like an odd cause, since in my specific case, I don't even get
>> an error, just crazy values, -2^31 to ~10^38, in later calculations
>>
>> --
>> James Miller
>
> IIRC the code that actually does -profile is in the backend, and is done
> with very low-level calls.  Inserting calls can change the register usage
> patterns, interfere with cse elimination, etc.  I assume this is what is
> happening, and with x64 and doubles that mean xmm codegen, which is still
> relatively new and buggy.
>
> Could you post the disassembly? (with intel syntax please)
>
> It might be possible to work around it by changing the calling convention of
> uniform and/or the functions it calls.

My code uses floats, so I just tested using floats instead of doubles
and while I don't get the error, I do get incorrect values. I'll post
the code I used and the disassembly to bugzilla.

--
James Miller