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Re: [PATCH GCC]Refactor force_expr_to_var_cost and handle type conversion


On Fri, Nov 8, 2013 at 10:06 PM, Richard Biener
<richard.guenther@gmail.com> wrote:
> On Fri, Nov 8, 2013 at 2:41 PM, bin.cheng <bin.cheng@arm.com> wrote:
>> Hi,
>> This patch refactors force_expr_to_var_cost and handles type conversion
>> along with other tree nodes.  It is split from the patch posted at
>> http://gcc.gnu.org/ml/gcc-patches/2013-11/msg00546.html
>> Bootstrap and test with the patch lowering address expressions on
>> x86/x86_64/arm.  Is it OK?
>
> ENOPATCH
>
Attached here.
I think it should be stated that this patch and the lowering one are
logically one because we rely on this patch to compute cost of lowered
address expression like "&arr + offset".
Moreover, address_cost on x86/x86_64 (is 1) are small, so this patch
has small impact on these two targets.  While address_cost on arm (is
9) is non-trivial, it has greater impact on ARM.  The statement is in
line with various benchmark data.

Thanks,
bin
-- 
Best Regards.

Attachment: ivopt-force_expr_to_var-20131108.txt
Description: Text document


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