Add test for issue rust-lang#27130

Dylan-DPC-zz · Aug 25, 2020 · a4090d2 · a4090d2
1 parent 1799d31
commit a4090d2
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/src/test/codegen/issue-27130.rs b/src/test/codegen/issue-27130.rs
@@ -0,0 +1,22 @@
+// compile-flags: -O
+// min-llvm-version: 11.0
+
+#![crate_type = "lib"]
+
+// CHECK-LABEL: @trim_in_place
+#[no_mangle]
+pub fn trim_in_place(a: &mut &[u8]) {
+    while a.first() == Some(&42) {
+        // CHECK-NOT: slice_index_order_fail
+        *a = &a[1..];
+    }
+}
+
+// CHECK-LABEL: @trim_in_place2
+#[no_mangle]
+pub fn trim_in_place2(a: &mut &[u8]) {
+    while let Some(&42) = a.first() {
+        // CHECK-NOT: slice_index_order_fail
+        *a = &a[1..];
+    }
+}