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/* { dg-do compile } */
/* { dg-options "-Os -fdump-tree-optimized" } */
/*
* License: GPL
* Copyright: (c) 2007 by Till Harbaum <till@harbaum.org>
* Copyright: (c) 2008 Wolfgang Moser, http://d81.de
*/
/* #include <avr/wdt.h> */
/* some declarations from the include above for ATMega8 */
#define _SFR_IO8(io_addr) (*(volatile unsigned char *)((io_addr) + 0x20))
#define TOV0 0
#define TCNT0 _SFR_IO8(0x32)
#define TIFR _SFR_IO8(0x38)
#define DDRC _SFR_IO8(0x14)
#define DDRD _SFR_IO8(0x11)
#define PORTC _SFR_IO8(0x15)
#define PORTD _SFR_IO8(0x12)
static void delay_wait_us( unsigned char timeout ) {
__asm__ __volatile__ ("wdr");
TCNT0 = timeout;
TIFR |= (1 << (TOV0));
/* wait until counter overflows */
while(!(TIFR & (1 << (TOV0))));
}
/* The original testcase was multiplying by 1000. Gcc is now smart enough
to work out that actual parameter is 5000 that is not what testcase was
about. Obstructate the code somewhat then. */
int a;
static void delay_wait_us_ms( unsigned char timeout ) {
delay_wait_us( timeout * a );
}
void makeUseOfTimerWait( unsigned char val ) {
delay_wait_us( 10 );
DDRC |= 0x10;
delay_wait_us( 10 );
DDRD |= 0x20;
delay_wait_us( 20 );
PORTC &= ~0x10;
delay_wait_us( 10 );
PORTD &= ~0x20;
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
delay_wait_us_ms( 5 );
PORTC |= val & 0x10;
delay_wait_us( 10 );
PORTD |= val & 0x20;
delay_wait_us( 10 );
}
/* We should not inline the delay loops. */
/* { dg-final { scan-tree-dump "delay_wait_us" "optimized"} } */
/* { dg-final { scan-tree-dump "delay_wait_us_ms" "optimized"} } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
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