Re: [avr-gcc-list] Code optimistaion in AVR Tiny13

[Ruud Vlaming]

On Monday 16 February 2009 15:11, Robert von Knobloch wrote:

> On inspection I find that the compiler has 'in-lined' at least 3
> function calls that I had written as a function to achieve compactness.
> Is there any way I can stop this, or is this a bug?

There has been some discussions about this before. After trying many
different optimization settings i concluded that
  --param inline-call-cost=2 
is -overall- the best setting for small projects. However, if you need to 
minimize just one app, further reduction might be possible. 
For example with things like:
  -fno-inline-small-functions 
  -fno-split-wide-types 
  -fno-tree-scev-cprop 

Also, you can prohibit the compiler to inline on a function by function basis.

Just to be sure you have no dead code around, include:
  -ffunction-sections -Wl,--gc-sections -Wl,--relax

Ruud.