[dmd-internals] dmd commit, revision 497

[Walter Bright]

To inline, the source must be known. The best way to do that is the way 
std.algorithm does it - pass the delegate as an alias parameter to a 
template.

Jason House wrote:
> What are the inlining rules for delegates/lazy arguments when the 
> delegate should be known at compile time? I'm porting some C++ code 
> with a number of #define's that give the first half of a for loop. The 
> body is naturally a delegate parameter, but performance is critical.
>
> Sent from my iPhone
>
> On May 21, 2010, at 9:44 PM, Walter Bright <walter at digitalmars.com> 
> wrote:
>
>>
>>
>> dsource.org wrote:
>>> dmd commit, revision 497
>>>
>>>
>>> user: walter
>>>
>>> msg:
>>> bugzilla 2008 Poor optimization of functions with ref parameters
>>>
>>> http://www.dsource.org/projects/dmd/changeset/497
>>>
>>>
>>
>> A couple other improvements to the inliner are possible:
>>
>> 1. inline functions with loops in them, as long as the place where 
>> they are inlined is a statement rather than an expression
>>
>> 2. always inline private functions that are called exactly once, even 
>> if they are large, if it is possible to inline them
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