From b865a761cbc2cfdffbcb1f60607da73172bc9772 Mon Sep 17 00:00:00 2001
From: Erik Desjardins <erikdesjardins@users.noreply.github.com>
Date: Sun, 15 Aug 2021 14:26:14 -0400
Subject: [PATCH] add regression test

---
 ...issue-88043-bb-does-not-have-terminator.rs | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 src/test/ui/codegen/issue-88043-bb-does-not-have-terminator.rs

diff --git a/src/test/ui/codegen/issue-88043-bb-does-not-have-terminator.rs b/src/test/ui/codegen/issue-88043-bb-does-not-have-terminator.rs
new file mode 100644
index 00000000000..1a6aadc662b
--- /dev/null
+++ b/src/test/ui/codegen/issue-88043-bb-does-not-have-terminator.rs
@@ -0,0 +1,25 @@
+// build-pass
+// compile-flags: -Copt-level=0
+
+// Regression test for #88043: LLVM crash when the RemoveZsts mir-opt pass is enabled.
+// We should not see the error:
+// `Basic Block in function '_ZN4main10take_until17h0067b8a660429bc9E' does not have terminator!`
+
+fn bump() -> Option<usize> {
+    unreachable!()
+}
+
+fn take_until(terminate: impl Fn() -> bool) {
+    loop {
+        if terminate() {
+            return;
+        } else {
+            bump();
+        }
+    }
+}
+
+// CHECK-LABEL: @main
+fn main() {
+    take_until(|| true);
+}