Re: [avr-gcc-list] Can someone benchmark this option please

[Bernard Fouché]

Hi Andy.

avr-gcc -c -mmcu=at90can128 -finline-limit=10 -mcall-prologues -g -Os 
-fsigned-char -funsigned-bitfields -fpack-struct -fshort-enums 
-Wstrict-prototypes  -std=gnu99:

section      size      addr
.text       68232         0
.bss         3557   8388864
.stab      157716         0
.stabstr    46996         0
Total      276501

The same with -fno-if-conversion:

section      size      addr
.text       68074         0
.bss         3557   8388864
.stab      157716         0
.stabstr    47019         0
Total      276366

(tests done with avr-gcc 4.3.0 & avr-libc 1.6.2 with a real world 
application)

In my own tests to keep size at minimum while moving to gcc4.3.0, the 
best option I found was '-finline-limit=X' with a very small X (10 in my 
example)

What is the size of 'a' in your example?  8 bits? 32 bits?

  Bernard