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/*
bug-136564.c
loop induction
*/
#include <testfwk.h>
volatile unsigned char p;
unsigned char i_result[3];
void
foo (void)
{
unsigned char i;
unsigned char u;
static unsigned char c = '?';
u = 0;
while (1)
{
i = 0;
switch (u)
{
case 0:
/* this BBlock _case_0_0:
- changes i
- jumps to the successor "_swBrk_0" */
p = 0;
i = 42; /* fixed: Absent in "main.asm" */
break;
case 1:
/* the while loop:
- inducts i
- has the exit block "_swBrk_0"
sdcc inserts a new BBlock "loopExitLbl" before "_swBrk_0".
"loopExitLbl" becomes the new successor for the exit blocks of the while loop.
In "loopExitLbl" i can be restored without interference from
"_swBrk_0". */
while (c != 'x' && i < 9 )
i++;
break;
default:
p = 2;
i = 24; /* fixed: Absent in "main.asm" */
}
p = i;
i_result[u] = i;
if (u >= 2)
return;
u++;
}
}
int _strncmp (
const char * first,
const char * last,
unsigned count
)
{
while (--count && *first && *first == *last) {
first++;
last++;
}
return( *first - *last );
}
void
testInducion(void)
{
foo();
ASSERT(i_result[0] == 42);
ASSERT(i_result[1] == 9);
ASSERT(i_result[2] == 24);
ASSERT(_strncmp ("SDCC is great", "SDCC is buggy", sizeof("SDCC is" )) == 0);
ASSERT(_strncmp ("SDCC is great", "SDCC is buggy", sizeof("SDCC is ")) != 0);
}
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