[avr-gcc-list] gcc builds wrong code?

[Klaus Rudolph]

Hi all,

I wrote the following testcode and found that if a table of pointers to 
functions
recides in flash "attribute progmem" the code is not correct.

Is the compiler doing the wrong or am I the problem :-)

Compiler Version:
avr-gcc (GCC) 3.4.0

Build my code with:
avr-gcc -O2 -g -mmcu=at90s8515 test.c -c
avr-gcc -O2 -g -mmcu=at90s8515 test.o -o go

The code generation is wrong if version 1 is enabled, with version 2 the 
code is
correct.

Thanks
   Klaus

///////////////////////////////// test.c /////////////////////////////


#ifdef __AVR__
#include <avr/io.h>
#endif

int f2(int a) {
   return a+1;
}

int f3(int a) {
   return a*2;
}

int f4(int a) {
   return a*2+1;
}



volatile int all=0;

typedef int(*fp_t)(int) ;

// Version 1 fail
const fp_t __attribute__ ((progmem)) fp[]={f2,f3,f4,0} ;
//Version 2 ok
//const fp_t fp[]={f2,f3,f4,0} ;


int main() {
   int index=1;
   int tmp=1;

   while (fp[index]) {
       tmp+=(fp[index++])(tmp);
   }

   all=tmp;

   return 0;
}