Re: loop-unrolling in gcc-4.6.2

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On 26/11/2012, at 9:31 PM, naga raj wrote:

> On Mon, Nov 26, 2012 at 12:13 PM, Maxim Kuvyrkov <maxim@xxxxxxxxxxxxxxxx> wrote:
>> --param
> 
> Thanks Maxim Kuvyrkov for your inputs. I have tried all the flags that
> you have suggested but they didn't help.
> 
> As you suggested I will investigate where this loop-unrolling is
> blocked but are there any specific areas to be look in to the target
> regarding this??

I doubt you can productively troubleshoot this without a compiler built for debugging (i.e., non-boostrapped built with "-O0 -g").  When you have that, you can start stepping through loop optimizers and check why they are deciding not to unroll your loops.

--
Maxim Kuvyrkov
CodeSourcery / Mentor Graphics




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