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Diffstat (limited to 'tests/mir-opt/dead-store-elimination/cycle.rs')
-rw-r--r-- | tests/mir-opt/dead-store-elimination/cycle.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tests/mir-opt/dead-store-elimination/cycle.rs b/tests/mir-opt/dead-store-elimination/cycle.rs new file mode 100644 index 000000000..b35ce0bcb --- /dev/null +++ b/tests/mir-opt/dead-store-elimination/cycle.rs @@ -0,0 +1,22 @@ +// unit-test: DeadStoreElimination + +#[inline(never)] +fn cond() -> bool { + false +} + +// EMIT_MIR cycle.cycle.DeadStoreElimination.diff +fn cycle(mut x: i32, mut y: i32, mut z: i32) { + // This example is interesting because the non-transitive version of `MaybeLiveLocals` would + // report that *all* of these stores are live. + while cond() { + let temp = z; + z = y; + y = x; + x = temp; + } +} + +fn main() { + cycle(1, 2, 3); +} |