--- a/llvm/lib/Support/SHA1.cpp	Mon May 25 11:50:15 2020 +0900
+++ b/llvm/lib/Support/SHA1.cpp	Mon May 25 11:55:54 2020 +0900
@@ -16,12 +16,12 @@
 
 #include "llvm/Support/SHA1.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Host.h"
-using namespace llvm;
+#include <string.h>
 
-#include <stdint.h>
-#include <string.h>
+using namespace llvm;
 
 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
 #define SHA_BIG_ENDIAN
@@ -238,6 +238,11 @@
     addUncounted(C);
 }
 
+void SHA1::update(StringRef Str) {
+  update(
+      ArrayRef<uint8_t>((uint8_t *)const_cast<char *>(Str.data()), Str.size()));
+}
+
 void SHA1::pad() {
   // Implement SHA-1 padding (fips180-2 5.1.1)