1 files changed, 35 insertions, 0 deletions
diff --git a/test/CodeGen/MIR/X86/duplicate-register-flag-error.mir b/test/CodeGen/MIR/X86/duplicate-register-flag-error.mir
new file mode 100644
index 0000000000000..d80c6ed061de8
--- /dev/null
+++ b/test/CodeGen/MIR/X86/duplicate-register-flag-error.mir
@@ -0,0 +1,35 @@
+# RUN: not llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s 2>&1 | FileCheck %s
+
+--- |
+
+  define i32 @foo(i32 %a) {
+  entry:
+    %0 = icmp sle i32 %a, 10
+    br i1 %0, label %less, label %exit
+
+  less:
+    ret i32 0
+
+  exit:
+    ret i32 %a
+  }
+
+...
+---
+name:            foo
+body: |
+  bb.0.entry:
+    successors: %bb.1.less, %bb.2.exit
+
+    CMP32ri8 %edi, 10, implicit-def %eflags
+  ; CHECK: [[@LINE+1]]:31: duplicate 'implicit' register flag
+    JG_1 %bb.2.exit, implicit implicit %eflags
+
+  bb.1.less:
+    %eax = MOV32r0 implicit-def %eflags
+    RETQ %eax
+
+  bb.2.exit:
+    %eax = COPY %edi
+    RETQ %eax
+...