From 7894938a45c9b57816345a29d26ebd1083d88992 Mon Sep 17 00:00:00 2001
From: Filipe Cabecinhas <me@filcab.net>
Date: Fri, 29 Apr 2016 16:48:07 +0000
Subject: Add operator- to Path's reverse_iterator. Needed for D19666

Reviewers: rafael, craig.topper, bogner

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D19724

llvm-svn: 268062
---
 llvm/lib/Support/Path.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/Support/Path.cpp')

diff --git a/llvm/lib/Support/Path.cpp b/llvm/lib/Support/Path.cpp
index 875bf75b1f0..f9a71b986a8 100644
--- a/llvm/lib/Support/Path.cpp
+++ b/llvm/lib/Support/Path.cpp
@@ -353,6 +353,10 @@ bool reverse_iterator::operator==(const reverse_iterator &RHS) const {
          Position == RHS.Position;
 }
 
+ptrdiff_t reverse_iterator::operator-(const reverse_iterator &RHS) const {
+  return Position - RHS.Position;
+}
+
 StringRef root_path(StringRef path) {
   const_iterator b = begin(path),
                  pos = b,
-- 
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