diff --git a/test/Regression/CodeGen/X86/2006-07-12-InlineAsmQConstraint.ll b/test/Regression/CodeGen/X86/2006-07-12-InlineAsmQConstraint.ll
new file mode 100644
index 00000000000..5bca651d902
--- /dev/null
+++ b/test/Regression/CodeGen/X86/2006-07-12-InlineAsmQConstraint.ll
@@ -0,0 +1,18 @@
+; RUN: llvm-as < %s | llc -march=x86
+; PR828
+
+target endian = little
+target pointersize = 32
+target triple = "i686-pc-linux-gnu"
+
+implementation   ; Functions:
+
+void %_ZN5() {
+
+cond_true9:             ; preds = %entry
+        %tmp3.i.i = call int asm sideeffect "lock; cmpxchg $1,$2",
+"={ax},q,m,0,~{dirflag},~{fpsr},~{flags},~{memory}"( int 0, int* null, int 0 ) 
+              ; <int> [#uses=0]
+        ret void
+}
+