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diff --git a/test/CodeGen/SystemZ/2009-08-21-InlineAsmRConstraint.ll b/test/CodeGen/SystemZ/2009-08-21-InlineAsmRConstraint.ll
new file mode 100644
index 0000000..f7686f1
--- /dev/null
+++ b/test/CodeGen/SystemZ/2009-08-21-InlineAsmRConstraint.ll
@@ -0,0 +1,21 @@
+; RUN: llc < %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:16-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:16:16-f128:128:128"
+target triple = "s390x-ibm-linux-gnu"
+
+@__JCR_LIST__ = internal global [0 x i8*] zeroinitializer, section ".jcr", align 8 ; <[0 x i8*]*> [#uses=1]
+
+define internal void @frame_dummy() nounwind {
+entry:
+ %asmtmp = tail call void (i8*)* (void (i8*)*)* asm "", "=r,0"(void (i8*)* @_Jv_RegisterClasses) nounwind ; <void (i8*)*> [#uses=2]
+ %0 = icmp eq void (i8*)* %asmtmp, null ; <i1> [#uses=1]
+ br i1 %0, label %return, label %bb3
+
+bb3: ; preds = %entry
+ tail call void %asmtmp(i8* bitcast ([0 x i8*]* @__JCR_LIST__ to i8*)) nounwind
+ ret void
+
+return: ; preds = %entry
+ ret void
+}
+
+declare extern_weak void @_Jv_RegisterClasses(i8*)
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