From 078d967e0a7e6dd78ac9eb28a1d50fd9319b88d1 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 18 Nov 2010 17:14:56 +0000
Subject: Bounds-check APInt's operator[].

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119708 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/APInt.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 88f9ac63f7..6bbe9ab463 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;
 }
-- 
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