avoid undefined behavior negating minint.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110117 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 93ca8cdaacd149a8097edbd8eb19450a089e8b6c..776c2d4495c167110fb6a8bbd71410bdc3e875d2 100644 (file)
--- 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);