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diff --git a/test/CodeGen/CBackend/2002-08-20-UnnamedArgument.ll b/test/CodeGen/CBackend/2002-08-20-UnnamedArgument.ll
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+++ b/test/CodeGen/CBackend/2002-08-20-UnnamedArgument.ll
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+; RUN: llc < %s -march=c
+
+; The C Writer bombs on this testcase because it tries the print the prototype
+; for the test function, which tries to print the argument name. The function
+; has not been incorporated into the slot calculator, so after it does the name
+; lookup, it tries a slot calculator lookup, which fails.
+
+define i32 @test(i32) {
+ ret i32 0
+}