rt_gccstream/gcc/testsuite/gcc.dg/Wstrict-overflow-13.c

19 lines
503 B
C

/* { dg-do compile } */
/* { dg-options "-fstrict-overflow -O2 -Wstrict-overflow=2" } */
/* Source: Ian Lance Taylor. Dual of no-strict-overflow-6.c. */
/* VRP test. This turns into an infinite loop (depending on what
bigtime_test does), but at least we warn about it. */
extern int bigtime_test (int);
int
foo ()
{
int j;
for (j = 1; 0 < j; j *= 2) /* { dg-warning "assuming signed overflow does not occur" "correct warning" } */
if (! bigtime_test (j))
return 1;
return 0;
}