From 22881f156d215e11b4c776714cbd0aa616b0cf8b Mon Sep 17 00:00:00 2001
From: Simon Kornblith <simon@simonster.com>
Date: Thu, 11 Dec 2014 20:54:15 -0500
Subject: [PATCH] Make SubArrays immutable

Since #8867 this actually makes a difference in the optimizations LLVM
is able to perform.
---
 base/subarray.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/subarray.jl b/base/subarray.jl
index 3c02ef332e356..5c5e237ccc752 100644
--- a/base/subarray.jl
+++ b/base/subarray.jl
@@ -5,7 +5,7 @@ typealias RangeIndex Union(Int, Range{Int}, UnitRange{Int}, Colon)
 # LD is the last dimension up through which this object has efficient
 # linear indexing. If LD==N, then the object itself has efficient
 # linear indexing.
-type SubArray{T,N,P<:AbstractArray,I<:(ViewIndex...),LD} <: AbstractArray{T,N}
+immutable SubArray{T,N,P<:AbstractArray,I<:(ViewIndex...),LD} <: AbstractArray{T,N}
     parent::P
     indexes::I
     dims::NTuple{N,Int}