CachePruning.h - reduce StringRef.h to Optional.h include. NFC

We only need to include Optional.h, forward declare StringRef and move the StringRef.h include down to CachePruning.cpp.

2 files changed, 3 insertions, 2 deletions

diff --git a/llvm/include/llvm/Support/CachePruning.h b/llvm/include/llvm/Support/CachePruning.h
index a72a864..10d6372 100644
--- a/llvm/include/llvm/Support/CachePruning.h
+++ b/llvm/include/llvm/Support/CachePruning.h
@@ -14,12 +14,13 @@
 #ifndef LLVM_SUPPORT_CACHE_PRUNING_H
 #define LLVM_SUPPORT_CACHE_PRUNING_H
 
-#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Optional.h"
 #include <chrono>
 
 namespace llvm {
 
 template <typename T> class Expected;
+class StringRef;
 
 /// Policy for the pruneCache() function. A default constructed
 /// CachePruningPolicy provides a reasonable default policy.
diff --git a/llvm/lib/Support/CachePruning.cpp b/llvm/lib/Support/CachePruning.cpp
index 7a2f6c5..7663644 100644
--- a/llvm/lib/Support/CachePruning.cpp
+++ b/llvm/lib/Support/CachePruning.cpp
@@ -11,7 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/CachePruning.h"
-
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Errc.h"
 #include "llvm/Support/Error.h"