From 10a4c67a613d84e80cba5fd52442d5cc30970cc6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=A1niel=20Buga?= <bugadani@gmail.com>
Date: Fri, 5 Mar 2021 16:01:46 +0100
Subject: [PATCH] Add regression test for #75525

---
 src/test/codegen/issue-75525-bounds-checks.rs | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/test/codegen/issue-75525-bounds-checks.rs

diff --git a/src/test/codegen/issue-75525-bounds-checks.rs b/src/test/codegen/issue-75525-bounds-checks.rs
new file mode 100644
index 0000000000000..a03c63c1d0948
--- /dev/null
+++ b/src/test/codegen/issue-75525-bounds-checks.rs
@@ -0,0 +1,27 @@
+// Regression test for #75525, verifies that no bounds checks are generated.
+
+// min-llvm-version: 12.0.0
+// compile-flags: -O
+
+#![crate_type = "lib"]
+
+// CHECK-LABEL: @f0
+// CHECK-NOT: panic
+#[no_mangle]
+pub fn f0(idx: usize, buf: &[u8; 10]) -> u8 {
+    if idx < 8 { buf[idx + 1] } else { 0 }
+}
+
+// CHECK-LABEL: @f1
+// CHECK-NOT: panic
+#[no_mangle]
+pub fn f1(idx: usize, buf: &[u8; 10]) -> u8 {
+    if idx > 5 && idx < 8 { buf[idx - 1] } else { 0 }
+}
+
+// CHECK-LABEL: @f2
+// CHECK-NOT: panic
+#[no_mangle]
+pub fn f2(idx: usize, buf: &[u8; 10]) -> u8 {
+    if idx > 5 && idx < 8 { buf[idx] } else { 0 }
+}