Detailed inline behavior of dmd?

[qznc]

On Tuesday, 6 August 2013 at 11:01:35 UTC, SteveGuo wrote:
> D supports inline functions, But I want to know the details.
>
> 2. The depth of inline.
> 3. If I add the switch -inline when compiling, it will inline 
> everything no matter how complex the function is?

As far as I know, no compiler specifies anything for this. 
Inlining is a difficult optimization, because it is hard to 
quantify if a specific call is worth inlining. Usually, there are 
handwavy heuristics and various magic numbers. Nobody should 
depend on exact behavior here. For specific cases, you can always 
inspect the assembly.

Inlining everything is not possible in general. Consider 
recursive functions aka circles in the call graph. Dynamic 
binding and function pointers lead to calls of unknown functions.