diff options
Diffstat (limited to 'src/test/mir-opt/dest-prop/dead_stores_better.rs')
-rw-r--r-- | src/test/mir-opt/dest-prop/dead_stores_better.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/mir-opt/dest-prop/dead_stores_better.rs b/src/test/mir-opt/dest-prop/dead_stores_better.rs new file mode 100644 index 000000000..003ad57d8 --- /dev/null +++ b/src/test/mir-opt/dest-prop/dead_stores_better.rs @@ -0,0 +1,21 @@ +// This is a copy of the `dead_stores_79191` test, except that we turn on DSE. This demonstrates +// that that pass enables this one to do more optimizations. + +// unit-test: DestinationPropagation +// compile-flags: -Zmir-enable-passes=+DeadStoreElimination + +fn id<T>(x: T) -> T { + x +} + +// EMIT_MIR dead_stores_better.f.DestinationPropagation.after.mir +pub fn f(mut a: usize) -> usize { + let b = a; + a = 5; + a = b; + id(a) +} + +fn main() { + f(0); +} |