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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-vrp1-details" } */
static int blocksize = 4096;
int bar (int);
void foo (void)
{
int toread;
int bytes;
static char eof_reached = 0;
toread = blocksize;
bytes = 1;
while (toread != 0)
{
bytes = bar (toread);
if (bytes <= 0)
{
if (bytes < 0)
continue;
break;
}
toread -= bytes;
}
if (bytes == 0)
eof_reached = 1;
}
/* First, we should simplify the bits < 0 test within the loop. */
/* { dg-final { scan-tree-dump-times "Simplified relational" 1 "vrp1" } } */
/* Second, we should thread the edge out of the loop via the break
statement. We also realize that the final bytes == 0 test is useless,
and thread over it. */
/* { dg-final { scan-tree-dump-times "Threaded jump" 3 "vrp1" } } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */
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