Add a test exposing an issue with the unloading of inlined functions coming from a pch/pcm.

test/CodeUnloading/PCH/Inlines.C

@@ -0,0 +1,18 @@
+// RUN: rm -f Inlines.h.pch
+// RUN: clang -cc1 -target-cpu x86-64 -fdeprecated-macro -fmath-errno -fexceptions -fcxx-exceptions -fgnu-keywords -emit-pch -xc++ -std=c++11 %S/Inputs/Inlines.h -o Inlines.h.pch
+// RUN: cat %s | %cling -I%p -Xclang -trigraphs -Xclang -include-pch -Xclang Inlines.h.pch  2>&1 | FileCheck %s
+
+//XFAIL:*
+#include "Inputs/Inlines.h"
+extern "C" int printf(const char*, ...);
+CompGen a;
+CompGen b = a;
+//.storeState "a"
+printf("%d %d\n", a.InlineFunc(), b.InlineFunc());
+.undo 1
+printf("%d %d\n", a.InlineFunc(), b.InlineFunc());
+ //.compareState "a"
+
+ // CHECK: I was executed
+ // CHECK: I was executed
+.q

test/CodeUnloading/PCH/Inputs/Inlines.h

@@ -0,0 +1,9 @@
+#ifndef INCLUDE_COMPGEN_H
+#define INCLUDE_COMPGEN_H
+struct CompGen {
+  int I;
+  inline int InlineFunc();
+};
+
+int CompGen::InlineFunc() { return 17; }
+#endif //INCLUDE_COMPGEN_H