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//
// Tests for single-use-variable elimination
//
// Check forward movement of values
#[test="simple_fwd_exp"]
fn simple_fwd(a: i32) -> (i32,)
{
let v: i32;
bb0: {
ASSIGN v = a;
ASSIGN retval = (v,);
} RETURN;
}
fn simple_fwd_exp(a: i32) -> (i32,)
{
bb0: {
ASSIGN retval = (a,);
} RETURN;
}
// Reverse (upwards) movement
#[test="simple_rev_exp"]
fn simple_rev(a: i32) -> (i32,)
{
let v: (i32,);
bb0: {
ASSIGN v = (a,);
ASSIGN retval = v;
} RETURN;
}
fn simple_rev_exp(a: i32) -> (i32,)
{
bb0: {
ASSIGN retval = (a,);
} RETURN;
}
// Check that if there's a mutable borrow of the source, that the source isn't propagated forwards
// - NOTE: This relies on the optimiser not being smart enough to move the `retval` construction up
#[test="nomut"]
fn nomut(a: i32) -> (i32,)
{
let v: i32;
let ba: &mut i32;
bb0: {
ASSIGN v = a;
ASSIGN ba = &mut a;
//ASSIGN a* = +0;
ASSIGN retval = (v,);
DROP ba;
} RETURN;
}
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