GCC4.3.4 downside against GCC3.4.4 on mips?

Amker.Cheng amker.cheng@gmail.com
Mon Jul 12 01:32:00 GMT 2010


>>>
>>> while GCC3.4.4 treats the long long multiplication just like simple
>>> ones, which generates only one
>>> mult insn for each statement, like
>>>
>>> In my understanding, It‘s not necessary using three mult insn to implement
>>> long long mult, since the operands are converted from int type.
>>
>> This is more helpful.  It is a known case in which GCC 4.x generates worse
>> code.
>
> Should be fixed with 4.6.

Hi, I tested this problem on GCC4.6 snapshot, and it works.
But I could not find the specific patch or record in buglist,
could you help? thanks very much.

-- 
Best Regards.



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