about inline

Chung-Ju Wu jasonwucj@gmail.com
Mon Mar 25 14:18:00 GMT 2013


2013/3/25 ishare <june.tune.sea@gmail.com>:
> On Sun, Mar 24, 2013 at 01:21:42PM +0100, Oleg Endo wrote:
>> On Sun, 2013-03-24 at 15:03 +0800, Chung-Ju Wu wrote:
>> > 2013/3/24, ishare <june.tune.sea@gmail.com>:
>> > >
>> > >  If I not use optimization   in compilation , will those inline functions be
>> > > actually inlined by gcc ?
>> > >
>> > >  thanks!
>> > >
>> >
>> > Not unless you use 'always_inline' attribute.
>> >
>> > http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html#Function-Attributes
>>
>> Also, when in error or in doubt, use option '-save-temps' and look at
>> the asm code that is generated by the compiler.
>
>   Can this help to print all temp varibles on stack whose value may be optimized out by -O2 ?
>
>   thanks!

Hi,

No. The option '-save-temps' is to store the intermediate files permanently.

If you want to know what variables/statement might be optimized out,
you should use some static code analysis tools.



Best regards,
jasonwucj



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