1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/liveness/liveness-asm.rs b/src/test/ui/liveness/liveness-asm.rs
new file mode 100644
index 000000000..ea5f033cb
--- /dev/null
+++ b/src/test/ui/liveness/liveness-asm.rs
@@ -0,0 +1,45 @@
+// Ensure inout asm! operands are marked as used by the liveness pass
+
+// only-x86_64
+// check-pass
+
+#![allow(dead_code)]
+#![warn(unused_assignments)]
+#![warn(unused_variables)]
+
+use std::arch::asm;
+
+// Test the single inout case
+unsafe fn f1(mut src: *const u8) {
+    asm!("/*{0}*/", inout(reg) src); //~ WARN value assigned to `src` is never read
+}
+
+unsafe fn f2(mut src: *const u8) -> *const u8 {
+    asm!("/*{0}*/", inout(reg) src);
+    src
+}
+
+// Test the split inout case
+unsafe fn f3(mut src: *const u8) {
+    asm!("/*{0}*/", inout(reg) src => src); //~ WARN value assigned to `src` is never read
+}
+
+unsafe fn f4(mut src: *const u8) -> *const u8 {
+    asm!("/*{0}*/", inout(reg) src => src);
+    src
+}
+
+// Tests the use of field projections
+struct S {
+    field: *mut u8,
+}
+
+unsafe fn f5(src: &mut S) {
+    asm!("/*{0}*/", inout(reg) src.field);
+}
+
+unsafe fn f6(src: &mut S) {
+    asm!("/*{0}*/", inout(reg) src.field => src.field);
+}
+
+fn main() {}