The implementation of GeneralHash::addBits broke C++ aliasing rules; fix

it with memcpy. This also fixes a problem on big-endian hosts, where
addUnaligned would return different results depending on the alignment
of the data.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151247 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 46 deletions

diff --git a/lib/Support/Hashing.cpp b/lib/Support/Hashing.cpp
deleted file mode 100644
index 21fcdd7..0000000
--- a/lib/Support/Hashing.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-//===-- llvm/ADT/Hashing.cpp - Utilities for hashing ------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/Hashing.h"
-
-namespace llvm {
-
-// Add a possibly unaligned sequence of bytes.
-void GeneralHash::addUnaligned(const uint8_t *I, const uint8_t *E) {
-  ptrdiff_t Length = E - I;
-  if ((uintptr_t(I) & 3) == 0) {
-    while (Length > 3) {
-      mix(*reinterpret_cast<const uint32_t *>(I));
-      I += 4;
-      Length -= 4;
-    }
-  } else {
-    while (Length > 3) {
-      mix(
-        uint32_t(I[0]) +
-        (uint32_t(I[1]) << 8) +
-        (uint32_t(I[2]) << 16) +
-        (uint32_t(I[3]) << 24));
-      I += 4;
-      Length -= 4;
-    }
-  }
-
-  if (Length & 3) {
-    uint32_t Data = 0;
-    switch (Length & 3) {
-      case 3: Data |= uint32_t(I[2]) << 16;   // fall through
-      case 2: Data |= uint32_t(I[1]) << 8;    // fall through
-      case 1: Data |= uint32_t(I[0]); break;
-    }
-    mix(Data);
-  }
-}
-
-}