Add support for a chain of stat caches in the FileManager, rather than
only supporting a single stat cache. The immediate benefit of this
change is that we can now generate a PCH/AST file when including
another PCH file; in the future, the chain of stat caches will likely
be useful with multiple levels of PCH files.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84263 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Index/c-index-pch.c b/test/Index/c-index-pch.c
new file mode 100644
index 0000000..2298c8f
--- /dev/null
+++ b/test/Index/c-index-pch.c
@@ -0,0 +1,7 @@
+// RUN: clang-cc -emit-pch -x c -o %t.pch %S/c-index-pch.h &&
+// RUN: clang-cc -include-pch %t.pch -x c -emit-pch -o %t.ast %s &&
+// RUN: c-index-test %t.ast all | FileCheck -check-prefix=ALL %s
+// CHECK-ALL: FunctionDecl=foo
+// CHECK-ALL: VarDecl=bar
+// CHECK-ALL: FunctionDecl=wibble
+void wibble(int i);