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/* bug-895992.c
Life Range problem with
- uninitialized variable
- loop
- conditional block
LR problem hits all ports, but this test is mcs51 specific
*/
#include <testfwk.h>
char p0 = 2;
unsigned short loops;
static void
wait (void)
{
long i, j;
/* just clobber all registers: */
for (i = 0; i < 2; ++i)
for (j = 0; j < 2; ++j)
;
}
#if !defined(PORT_HOST)
# pragma disable_warning 84
#endif
static void
testLR (void)
{
unsigned char number;
unsigned char start = 1;
unsigned char i;
do
{
for (i = 1; i > 0 ; i--)
wait (); /* destroys all registers */
if (start)
{
number = p0;
start = 0;
}
number--; /* 'number' might be used before initialization */
/* the life range of 'number' must be extended to */
/* the whole loop _including_ the conditional block */
++loops;
}
while (number != 0);
ASSERT (loops == p0);
}
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