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From Nick Wellnhofer <wellnho...@aevum.de>
Subject Re: [lucy-dev] Optimization Bug On Mac OS X
Date Thu, 22 Mar 2012 09:11:43 GMT
On 22/03/2012 00:15, Marvin Humphrey wrote:
> The hypothesis is:
>
>    * The sum is being accumulated into a register that is larger than 32 bits.
>    * An extra op is necessary to determine that 32-bit overflow has occurred.
>    * This op has been inappriately optimized away by the compiler.

Or something with sign extension goes wrong. I can't test this on OS X 
myself, but I'd love to have a look at the compiled assembler code. Can 
you post it to the list?

Nick

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