From 4fc930229dff7669aaf315e0563bc586242d8e79 Mon Sep 17 00:00:00 2001
From: David Neto <dneto@google.com>
Date: Fri, 31 Mar 2017 10:36:10 -0400
Subject: [PATCH] opt::Function::cbegin and cend are const

---
 source/opt/function.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/source/opt/function.h b/source/opt/function.h
index 2e0674e0d..1c460d890 100644
--- a/source/opt/function.h
+++ b/source/opt/function.h
@@ -59,8 +59,12 @@ class Function {
 
   iterator begin() { return iterator(&blocks_, blocks_.begin()); }
   iterator end() { return iterator(&blocks_, blocks_.end()); }
-  const_iterator cbegin() { return const_iterator(&blocks_, blocks_.cbegin()); }
-  const_iterator cend() { return const_iterator(&blocks_, blocks_.cend()); }
+  const_iterator cbegin() const {
+    return const_iterator(&blocks_, blocks_.cbegin());
+  }
+  const_iterator cend() const {
+    return const_iterator(&blocks_, blocks_.cend());
+  }
 
   // Runs the given function |f| on each instruction in this function, and
   // optionally on debug line instructions that might precede them.