1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/machine-cp-debug.mir b/llvm/test/CodeGen/X86/machine-cp-debug.mir
new file mode 100644
index 00000000000..a7fcd9801e7
--- /dev/null
+++ b/llvm/test/CodeGen/X86/machine-cp-debug.mir
@@ -0,0 +1,23 @@
+# RUN: llc -mtriple=x86_64-unknown-linux-gnu -run-pass=machine-cp %s -o - | FileCheck %s
+
+# Machine copy propagation can remove dead copies. Make sure that the
+# DBG_VALUE does not keep the copy alive.
+#
+# CHECK-NOT: $ebx = COPY $eax
+
+--- |
+  define void @fred() {
+    ret void
+  }
+  !1 = !DIExpression()
+...
+
+---
+name: fred
+tracksRegLiveness: true
+body: |
+  bb.0:
+    liveins: $eax
+    $ebx = COPY $eax
+    DBG_VALUE debug-use $ebx, debug-use _, !1, !1
+...