From 5ed61fe6a108636a6f3de37d21ad80452f4c05a3 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[].

llvm-svn: 119708
---
 llvm/lib/Support/APInt.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to '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 @@ 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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