From: Dan Gohman <gohman@apple.com>
Date: Thu, 18 Nov 2010 17:14:56 +0000 (+0000)
Subject: Bounds-check APInt's operator[].
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=078d967e0a7e6dd78ac9eb28a1d50fd9319b88d1;p=oota-llvm.git

Bounds-check APInt's operator[].


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119708 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 88f9ac63f7e..6bbe9ab4632 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -483,6 +483,7 @@ APInt APInt::operator-(const APInt& RHS) const {
 }
 
 bool APInt::operator[](unsigned bitPosition) const {
+  assert(bitPosition < getBitWidth() && "Bit position out of bounds!");
   return (maskBit(bitPosition) &
           (isSingleWord() ?  VAL : pVal[whichWord(bitPosition)])) != 0;
 }