From 35a2b798efd61fec425553f387d76be9c522f184 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Wed, 14 Nov 2012 01:28:38 +0000
Subject: [PATCH] Fix an assertion failure printing the unused-label fixit in
 files using CRLF line endings.  <rdar://problem/12639047>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167900 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Lex/Lexer.cpp                |  9 ++++++++-
 test/FixIt/fixit-newline-style.c | 11 +++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 test/FixIt/fixit-newline-style.c

diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index bf0883e12a..354a44db84 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -1319,8 +1319,15 @@ SourceLocation Lexer::findLocationAfterToken(SourceLocation Loc,
       C = *(++TokenEnd);
       NumWhitespaceChars++;
     }
-    if (isVerticalWhitespace(C))
+
+    // Skip \r, \n, \r\n, or \n\r
+    if (C == '\n' || C == '\r') {
+      char PrevC = C;
+      C = *(++TokenEnd);
       NumWhitespaceChars++;
+      if ((C == '\n' || C == '\r') && C != PrevC)
+        NumWhitespaceChars++;
+    }
   }
 
   return TokenLoc.getLocWithOffset(Tok.getLength() + NumWhitespaceChars);
diff --git a/test/FixIt/fixit-newline-style.c b/test/FixIt/fixit-newline-style.c
new file mode 100644
index 0000000000..c43eb3789e
--- /dev/null
+++ b/test/FixIt/fixit-newline-style.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -pedantic -Wunused-label -x c %s 2>&1 | FileCheck %s -strict-whitespace
+
+// This file intentionally uses a CRLF newline style
+// <rdar://problem/12639047>
+// CHECK: warning: unused label 'ddd'
+// CHECK-NEXT: {{^  ddd:}}
+// CHECK-NEXT: {{^  \^~~~$}}
+void f() {
+  ddd:
+  ;
+}
-- 
2.40.0