Hi all,
In the latest WinAVR (avr-gcc (GCC) 4.1.2 (WinAVR 20070525) I found this.
Check this out:
//======================
void delay(unsigned del_cnt)
{
while(del_cnt--);
return;
}
//=======================
Compiles as (from the .lss file):
//=======================
void delay(word cnt)
{
2aa: 08 95 ret
while(cnt--);
return;
}
//=======================
The loop is not executed !!
Where as in an older version (WinAVR-20060421)
It compiles correctly as:
//==========================================
void delay(word cnt)
{
while(cnt--);
286: 01 97 sbiw r24, 0x01 ; 1
288: 2f ef ldi r18, 0xFF ; 255
28a: 8f 3f cpi r24, 0xFF ; 255
28c: 92 07 cpc r25, r18
28e: d9 f7 brne .-10 ; 0x286 <delay>
290: 08 95 ret
return;
}
//=======================================
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