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// No-op test
#[test="test_trivial"]
fn test_trivial()
{
bb0: {
ASSIGN retval = ();
} RETURN;
}
// Dead code elimination, should remove any useless code
// - Unused assignments
// - Unused locals
// - Unused drop flags
// - Unused blocks
#[test="dce_exp"]
fn dce()
{
let df0 = false;
let useless: ();
bb0: {
ASSIGN useless = ();
ASSIGN useless = useless; // Never read, so will be removed
ASSIGN retval = ();
//ASSIGN retval = (); // Note: won't be de-duplicated (TODO)
} RETURN;
// Never referenced, will be removed
bb_unused: {
} GOTO bb_unused_indir;
// Indirectly unused, will still be removed
bb_unused_indir: {
} DIVERGE;
// References itself without other reference, will be removed
bb_unused_self: {
} GOTO bb_unused_self;
}
fn dce_exp()
{
bb0: {
ASSIGN retval = ();
} RETURN;
}
// Inlining
#[test="inlining_exp"]
fn inlining()
{
bb0: {
} CALL retval = ::""::inlining_target() => bb1 else bb2;
bb1: {
} RETURN;
bb2: {
} DIVERGE;
}
fn inlining_target()
{
bb0: {
ASSIGN retval = ();
} RETURN;
}
fn inlining_exp()
{
bb0: {
ASSIGN retval = ();
} RETURN;
}
// Constant propagation leading to DCE
#[test="constprop_exp"]
fn constprop()
{
let v1: bool;
bb0: {
ASSIGN v1 = true;
} IF v1 => bb1 else bb2;
bb1: {
ASSIGN retval = ();
} RETURN;
bb2: {
} DIVERGE;
}
fn constprop_exp()
{
bb0: {
ASSIGN retval = ();
} RETURN;
}
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