AW: [avr-gcc-list] Code size optimization

[Haase Bjoern (PT-BEU/EMT) *]

Hi,

I think this might be related to the fact, that the function prologue/epilogue 
is emmitted not by RTL constructs but explicitly. I don't know an easy cure for 
this.

If you are using gcc.3.4.3 and have serious code-size problems, you might try 
to compile your sources 
with the -fnew-ra option in addition to -Os . 
There stands a chance 50/50 that the compiler will not succeed in generating 
assembler code for your application. For this reason this option is marked as 
'not for production use'. If, however, -fnew-ra succeeds you could assume that 
your code will be functional and correct and: *much* smaller. Expect about 5-10 
% code size reduction. If gcc fails with an internal compiler error, consider 
to split large source files into smaller ones and try to compile them 
individually with -fnew-ra.

Yours,

Björn