[llvm-commits] [llvm] r119708 - /llvm/trunk/lib/Support/APInt.cpp

[Dan Gohman]

Author: djg
Date: Thu Nov 18 11:14:56 2010
New Revision: 119708

URL: http://llvm.org/viewvc/llvm-project?rev=119708&view=rev
Log:
Bounds-check APInt's operator[].

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

Modified: llvm/trunk/lib/Support/APInt.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/APInt.cpp?rev=119708&r1=119707&r2=119708&view=diff
==============================================================================
--- llvm/trunk/lib/Support/APInt.cpp (original)
+++ llvm/trunk/lib/Support/APInt.cpp Thu Nov 18 11:14:56 2010
@@ -483,6 +483,7 @@
 }
 
 bool APInt::operator[](unsigned bitPosition) const {
+  assert(bitPosition < getBitWidth() && "Bit position out of bounds!");
   return (maskBit(bitPosition) &
           (isSingleWord() ?  VAL : pVal[whichWord(bitPosition)])) != 0;
 }