[llvm-commits] [llvm] r151824 - /llvm/trunk/lib/Support/Hashing.cpp

[Chandler Carruth]

Author: chandlerc
Date: Thu Mar  1 12:58:59 2012
New Revision: 151824

URL: http://llvm.org/viewvc/llvm-project?rev=151824&view=rev
Log:
Add the source file with trivial definitions in it that was missing from
r151822, sorry sorry. =[

We need 'git svn nothave' or some such...

Added:
    llvm/trunk/lib/Support/Hashing.cpp

Added: llvm/trunk/lib/Support/Hashing.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Hashing.cpp?rev=151824&view=auto
==============================================================================
--- llvm/trunk/lib/Support/Hashing.cpp (added)
+++ llvm/trunk/lib/Support/Hashing.cpp Thu Mar  1 12:58:59 2012
@@ -0,0 +1,29 @@
+//===-------------- lib/Support/Hashing.cpp -------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides implementation bits for the LLVM common hashing
+// infrastructure. Documentation and most of the other information is in the
+// header file.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/Hashing.h"
+
+using namespace llvm;
+
+// Provide a definition and static initializer for the fixed seed. This
+// initializer should always be zero to ensure its value can never appear to be
+// non-zero, even during dynamic initialization.
+size_t llvm::hashing::detail::fixed_seed_override = 0;
+
+// Implement the function for forced setting of the fixed seed.
+// FIXME: Use atomic operations here so that there is no data race.
+void llvm::set_fixed_execution_hash_seed(size_t fixed_value) {
+  hashing::detail::fixed_seed_override = fixed_value;
+}