[avr-gcc-list] Bug report

[Kang Tin LAI]

May be there was a report before.


Source:

char adc_flag = NOT_RDY;        /* external, (i.e., in SRAM) */
...
...

while (adc_flag == NOT_RDY);    /* wait for interrupt to set to RDY */


asm generated:

        lds r24,adc_flag        <- value is load to R24 only once
.L33:
        tst r24                 <- dead loop tests dead value
        breq .L33               <- never quit the loop

Label location .L33: should be before lds instruction?

avr-gcc is lastest snapshot, AVR8515, -O2 (perhaps problem is from
here, the optimizer? Let test later)

KTL