From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:03 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/ui/mir/simplify-branch-same.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/ui/mir/simplify-branch-same.rs

(limited to 'tests/ui/mir/simplify-branch-same.rs')

diff --git a/tests/ui/mir/simplify-branch-same.rs b/tests/ui/mir/simplify-branch-same.rs
new file mode 100644
index 000000000..d631c33d6
--- /dev/null
+++ b/tests/ui/mir/simplify-branch-same.rs
@@ -0,0 +1,21 @@
+// Regression test for SimplifyBranchSame miscompilation.
+// run-pass
+
+macro_rules! m {
+    ($a:expr, $b:expr, $c:block) => {
+        match $a {
+            Lto::Fat | Lto::Thin => { $b; (); $c }
+            Lto::No => { $b; () }
+        }
+    }
+}
+
+pub enum Lto { No, Thin, Fat }
+
+fn f(mut cookie: u32, lto: Lto) -> u32 {
+    let mut _a = false;
+    m!(lto, _a = true, {cookie = 0});
+    cookie
+}
+
+fn main() { assert_eq!(f(42, Lto::Thin), 0) }
-- 
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