[llvm-commits] [llvm] r110114 - /llvm/trunk/lib/Support/raw_ostream.cpp

[Chris Lattner]

Author: lattner
Date: Tue Aug  3 11:41:24 2010
New Revision: 110114

URL: http://llvm.org/viewvc/llvm-project?rev=110114&view=rev
Log:
avoid undef behavior on minint, fixing PR7783.

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=110114&r1=110113&r2=110114&view=diff
==============================================================================
--- llvm/trunk/lib/Support/raw_ostream.cpp (original)
+++ llvm/trunk/lib/Support/raw_ostream.cpp Tue Aug  3 11:41:24 2010
@@ -143,9 +143,10 @@
 }
 
 raw_ostream &raw_ostream::operator<<(long long N) {
-  if (N <  0) {
+  if (N < 0) {
     *this << '-';
-    N = -N;
+    // Avoid undefined behavior on INT64_MIN with a cast.
+    N = -(unsigned long long)N;
   }
 
   return this->operator<<(static_cast<unsigned long long>(N));