1 files changed, 32 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/MIR/X86/undefined-stack-object.mir b/llvm/test/CodeGen/MIR/X86/undefined-stack-object.mir
new file mode 100644
index 00000000000..bec703a2d11
--- /dev/null
+++ b/llvm/test/CodeGen/MIR/X86/undefined-stack-object.mir
@@ -0,0 +1,32 @@
+# RUN: not llc -march=x86-64 -start-after machine-sink -stop-after machine-sink -o /dev/null %s 2>&1 | FileCheck %s
+--- |
+
+  define i32 @test(i32 %a) {
+  entry:
+    %b = alloca i32
+    store i32 %a, i32* %b
+    %c = load i32, i32* %b
+    ret i32 %c
+  }
+
+...
+---
+name:            test
+isSSA:           true
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: gr32 }
+frameInfo:
+  maxAlignment:  4
+stack:
+  - { id: 0, name: b, size: 4, alignment: 4 }
+body:
+  - id:          0
+    name:        entry
+    instructions:
+      - '%0 = COPY %edi'
+      # CHECK: [[@LINE+1]]:18: use of undefined stack object '%stack.2'
+      - 'MOV32mr %stack.2, 1, _, 0, _, %0'
+      - '%eax = COPY %0'
+      - 'RETQ %eax'
+...