[Support] Use unsigned char for xxHash 64-bit

Before, the last 3 bytes were char-signedness dependent.

llvm-svn: 338128

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Support/xxhash.cpp b/llvm/lib/Support/xxhash.cpp
index a7d990bf6a4..df643f9bd63 100644
--- a/llvm/lib/Support/xxhash.cpp
+++ b/llvm/lib/Support/xxhash.cpp
@@ -71,12 +71,12 @@ static uint64_t mergeRound(uint64_t Acc, uint64_t Val) {
 uint64_t llvm::xxHash64(StringRef Data) {
   size_t Len = Data.size();
   uint64_t Seed = 0;
-  const char *P = Data.data();
-  const char *const BEnd = P + Len;
+  const unsigned char *P = Data.bytes_begin();
+  const unsigned char *const BEnd = Data.bytes_end();
   uint64_t H64;
 
   if (Len >= 32) {
-    const char *const Limit = BEnd - 32;
+    const unsigned char *const Limit = BEnd - 32;
     uint64_t V1 = Seed + PRIME64_1 + PRIME64_2;
     uint64_t V2 = Seed + PRIME64_2;
     uint64_t V3 = Seed + 0;