From: Fangrui Song <maskray@google.com>
Date: Fri, 27 Jul 2018 16:01:09 +0000 (+0000)
Subject: [Support] Use unsigned char for xxHash 64-bit
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=13b09222ff2e707275d0c18ec7caa2c706475ff4;p=llvm

[Support] Use unsigned char for xxHash 64-bit

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338128 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/xxhash.cpp b/lib/Support/xxhash.cpp
index a7d990bf6a4..df643f9bd63 100644
--- a/lib/Support/xxhash.cpp
+++ b/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;