hm...
thanks for spotting this.
will fix it in a minute.
cheers,
~d
On Wednesday 26 November 2003 22:18, Michael McClafferty wrote:
> Included below is a small piece of code that attempts
> to "shift down" some unsigned long's in an array. The
> 2nd assignment in "shiftArray()" fails:
>
>
> // Code start --- mspgcc_bug.c ---------------------------------
> //
> unsigned long temp[3] = {
> 0x11112222L,
> 0x33334444L,
> 0x00000000L
> };
>
> void shiftArray(unsigned long *t)
> {
> t[2] = t[1]; // OK - Code generated was (r15 is pointer to temp):
> // mov 4(r15), 8(r15)
> // mov 6(r15), 10(r15)
>
> t[1] = t[0]; // Fails - Generated code:
> // mov @r15+, 4(r15)
> // mov @r15+, 6(r15)
> }
>
> int main(void)
> {
> shiftArray(temp);
> return 0;
> }
> //
> // Code end ---------------------------------------------
>
>
> The problem is that r15 is being autoincremented in the last
> two fetches/sources. It's also being used as an index for the
> destination, without compensating for the fact that the fetches
> have altered r15.
>
> Background info:
>
> OS: Redhat 9.0
> Tools: Built from sources, Oct 20, 2003
> CPU: MSP430F149
> Cmd Line: msp430-gcc -mmcu=msp430x149 -O2 -Wall -g -o mspgcc_bug
> mspgcc_bug.c
>
> Am I doing something stupid, or is this really a compiler bug?
>
> Thanks,
> Mike
>
>
>
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