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Re: about inline
- From: Chung-Ju Wu <jasonwucj at gmail dot com>
- To: ishare <june dot tune dot sea at gmail dot com>
- Cc: Oleg Endo <oleg dot endo at t-online dot de>, gcc-help at gcc dot gnu dot org
- Date: Mon, 25 Mar 2013 22:18:25 +0800
- Subject: Re: about inline
- References: <20130324034422 dot GC23928 at debian dot localdomain> <CADj25HN6BOZ+rRyRf+B01mACPh_pgn490smORPnMietOx_UVow at mail dot gmail dot com> <1364127702 dot 2351 dot 44 dot camel at yam-132-YW-E178-FTW> <20130325032703 dot GA10084 at debian dot localdomain>
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