commit 5ed61fe6a108636a6f3de37d21ad80452f4c05a3
author Dan Gohman <gohman@apple.com> Thu Nov 18 17:14:56 2010 +0000
committer Dan Gohman <gohman@apple.com> Thu Nov 18 17:14:56 2010 +0000
tree 2b324fb0fd6f3c30f89e353a131b0dd78c4c15aa
parent 21a968364110442986077e86bd7a51fd0d86f974

Bounds-check APInt's operator[].

llvm-svn: 119708

llvm/lib/Support/APInt.cpp

diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index 88f9ac6..6bbe9ab 100644
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -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;
 }