Force inline without -O2

[Thomas Martitz]

Am 28.12.2009 13:30, schrieb Jie Zhang:
> On 12/28/2009 08:21 PM, Thomas Martitz wrote:
>> Am 28.12.2009 04:22, schrieb Jie Zhang:
>>> I think __attribute__((always_inline)) is used to inline functions
>>> even not optimizing. Below is from GCC manual:
>>>
>>> always_inline
>>> Generally, functions are not inlined unless optimization is
>>> specified. For functions declared inline, this attribute inlines the
>>> function even if no optimization level was specified.
>>
>>
>> That just means that it's inlined under the implicit default
>> optimization level -O1 (that is what you get "if no optimization level
>> was specified"). If you set -O0, it will not inline. I had problem where
>> -O0 broke code that is depended on being inlined.
>>
> GCC uses -O0 by default, not -O1.
>
>
> Jie

Hmm, ok, but it doesn't inline functions marked with 
__attribute__((always_inline)) with -O0. I tried that with gcc 4.4.2 for 
the arm-eabi target. Maybe it's a bug then, or maybe the manual means -O 
for "no optimization level specified"?

Best regards.