[MLton] Crashes with 64-bit native code generator on Windows

[David Hansel]

Hello Matthew,

I tried using "-native-commented 6" but (due to the size of the code involved)
compilation (in the "outputAssembly" stage) seems to take a VERY long time.
I also tried "-native-commented 5" with the same result.  A setting of "4"
worked much faster and I have uploaded a file hansel-20091130-1.s containing
the basic block.

I will try the others again but the "4" setting produced about 1200 .s output
files and with the "6" setting MLton produced the first (.0.s) output file
and then I stopped it after about an hour of not producing any more output.
I will try again but unless the process gets much faster after the second file
I don't think we'll get to output file #913 in any reasonable amount of time.

Are there ways to restrict the additional output to specific parts of the code?
Unfortunately,  I can't cut down the code much without the problem going away.

David


Matthew Fluet wrote:
> On Mon, Nov 30, 2009 at 12:45 PM, David Hansel
> <hansel at reactive-systems.com <mailto:hansel at reactive-systems.com>> wrote:
> 
>     See the code below.  It should match up with the code I posted before.
>     From what I can tell it does look like MLton puts the target address for
>     applyFFTempFun into a register but then later does the indirect call via
>     the memory location.
> 
> 
> Yes, it looks like it gets dropped into %r11, but not used from that
> location.
>  
> 
>     Please let me know if you need any more context or other debugging
>     information.  It does seem like you are on the right track.
> 
> 
> We need to find out when the codegen loses track of the fact that %r11
> has applyFFTempFun.  Could you compile with "-native-commented 6"? 
> That's the most debugging information that we can get from a precompiled
> MLton binary.  It produces a *lot* of debugging information (in the form
> of comments in the assembly).  Rather than posting to the mailing list,
> I suggest posting the basic block to http://mlton.org/TemporaryUpload.
> 
> -Matthew

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  David Hansel
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