From 2359e5193aa9fff9e005e99074ed40ea5d08f838 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 3 Aug 2010 16:57:03 +0000
Subject: [PATCH] avoid undefined behavior negating minint.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110117 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Bitcode/Writer/BitcodeWriter.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 93ca8cdaacd..776c2d4495c 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -735,8 +735,8 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
       Code = bitc::CST_CODE_UNDEF;
     } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
       if (IV->getBitWidth() <= 64) {
-        int64_t V = IV->getSExtValue();
-        if (V >= 0)
+        uint64_t V = IV->getSExtValue();
+        if ((int64_t)V >= 0)
           Record.push_back(V << 1);
         else
           Record.push_back((-V << 1) | 1);