From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/mir-opt/dest-prop/dead_stores_better.rs | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 tests/mir-opt/dest-prop/dead_stores_better.rs (limited to 'tests/mir-opt/dest-prop/dead_stores_better.rs') diff --git a/tests/mir-opt/dest-prop/dead_stores_better.rs b/tests/mir-opt/dest-prop/dead_stores_better.rs new file mode 100644 index 000000000..003ad57d8 --- /dev/null +++ b/tests/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(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); +} -- cgit v1.2.3