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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-vrp1-stats -fdump-tree-dom1-stats" } */
void foo();
void bla();
void bar();
/* This is a TODO -- it is correct to thread both entry and latch edge through
the header, but we do not handle this case yet. */
void dont_thread_1 (void)
{
int i = 0;
int first = 1;
do
{
if (first)
foo ();
else
bar ();
first = 0;
bla ();
} while (i++ < 100);
}
/* In this case we can thread if and only if we thread through the
header and around the latch. If one is done without the other, then
we create an irreducible CFG. */
/* { dg-final { scan-tree-dump-not "Jumps threaded" "vrp1"} } */
/* { dg-final { scan-tree-dump-not "Jumps threaded" "dom1"} } */
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