Viewing file:  ranger-threader-2.c (1023 B) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-thread1-details -w" } */
// Copied from ssa-dom-thread-12.c.
typedef long unsigned int size_t;
union tree_node;
typedef union tree_node *tree;
typedef union gimple_statement_d *gimple;
typedef const union gimple_statement_d *const_gimple;
union gimple_statement_d
{
unsigned num_ops;
tree exp;
};
unsigned int x;
static inline tree
gimple_op (const_gimple gs, unsigned i)
{
if (!(i < gs->num_ops))
abort ();
return gs->exp;
}
unsigned char
scan_function (gimple stmt)
{
unsigned i;
for (i = 0; i < stmt->num_ops - 3 ; i++)
gimple_call_arg (stmt, i);
gimple_op (stmt, 1);
}
/* The test which bypasses the loop is simplified prior to DOM to check
that stmt->num_ops - 3 != 0. When that test is false, we can derive
a value for stmt->num_ops. That in turn allows us to thread the jump
for the conditional at the start of the call to gimple_op. */
/* { dg-final { scan-tree-dump-times "Registering.*jump thread" 1 "thread1"} } */
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