[llvm] r218496 - Support: Remove undefined behavior from &raw_ostream::operator<<

[David Majnemer]

Author: majnemer
Date: Thu Sep 25 21:48:14 2014
New Revision: 218496

URL: http://llvm.org/viewvc/llvm-project?rev=218496&view=rev
Log:
Support: Remove undefined behavior from &raw_ostream::operator<<

Don't negate signed integer types in &raw_ostream::operator<<(const
FormattedNumber &FN).

Modified:
    llvm/trunk/lib/Support/raw_ostream.cpp

Modified: llvm/trunk/lib/Support/raw_ostream.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/raw_ostream.cpp?rev=218496&r1=218495&r2=218496&view=diff
==============================================================================
--- llvm/trunk/lib/Support/raw_ostream.cpp (original)
+++ llvm/trunk/lib/Support/raw_ostream.cpp Thu Sep 25 21:48:14 2014
@@ -433,7 +433,7 @@ raw_ostream &raw_ostream::operator<<(con
     char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
     char *CurPtr = EndPtr;
     bool Neg = (FN.DecValue < 0);
-    uint64_t N = Neg ? -FN.DecValue : FN.DecValue;
+    uint64_t N = Neg ? -static_cast<uint64_t>(FN.DecValue) : FN.DecValue;
     while (N) {
       *--CurPtr = '0' + char(N % 10);
       N /= 10;