2 files changed, 23 insertions, 0 deletions
diff --git a/llvm/include/llvm/ADT/StringExtras.h b/llvm/include/llvm/ADT/StringExtras.h
index 8de6fb257ce..bdbb4d3f593 100644
--- a/llvm/include/llvm/ADT/StringExtras.h
+++ b/llvm/include/llvm/ADT/StringExtras.h
@@ -59,6 +59,22 @@ static inline std::string utohexstr(uint64_t X, bool LowerCase = false) {
   return std::string(BufPtr, std::end(Buffer));
 }
 
+/// Convert buffer \p Input to its hexadecimal representation.
+/// The returned string is double the size of \p Input.
+static inline std::string toHex(StringRef Input) {
+  static const char *const LUT = "0123456789ABCDEF";
+  size_t Length = Input.size();
+
+  std::string Output;
+  Output.reserve(2 * Length);
+  for (size_t i = 0; i < Length; ++i) {
+    const unsigned char c = Input[i];
+    Output.push_back(LUT[c >> 4]);
+    Output.push_back(LUT[c & 15]);
+  }
+  return Output;
+}
+
 static inline std::string utostr(uint64_t X, bool isNeg = false) {
   char Buffer[21];
   char *BufPtr = std::end(Buffer);
diff --git a/llvm/include/llvm/Support/SHA1.h b/llvm/include/llvm/Support/SHA1.h
index 05892327a21..896a610eaf6 100644
--- a/llvm/include/llvm/Support/SHA1.h
+++ b/llvm/include/llvm/Support/SHA1.h
@@ -16,6 +16,8 @@
 #ifndef LLVM_SUPPORT_SHA1_H
 #define LLVM_SUPPORT_SHA1_H
 
+#include "llvm/ADT/ArrayRef.h"
+
 #include <cstdint>
 
 namespace llvm {
@@ -33,6 +35,11 @@ public:
   /// Digest more data.
   void update(ArrayRef<uint8_t> Data);
 
+  /// Digest more data.
+  void update(StringRef Str) {
+    update(ArrayRef<uint8_t>((uint8_t *)Str.data(), Str.size()));
+  }
+
   /// Return a reference to the current raw 160-bits SHA1 for the digested data
   /// since the last call to init(). This call will add data to the internal
   /// state and as such is not suited for getting an intermediate result