From a956b28d32a23fa321020fbc94b49d61164004d8 Mon Sep 17 00:00:00 2001
From: Ehsan Akhgari <ehsan.akhgari@gmail.com>
Date: Mon, 22 Sep 2014 19:49:07 +0000
Subject: [PATCH] Make MCAsmParserSemaCallback::LookupInlineAsmLabel a pure
 virtual function

Summary:
r218229 made this function return a dummy nullptr in order to avoid
API breakage between clang/llvm.

Reviewers: rnk

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5432

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218266 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/MC/MCParser/MCAsmParser.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/llvm/MC/MCParser/MCAsmParser.h b/include/llvm/MC/MCParser/MCAsmParser.h
index b1e9faa842d..ffe89e6fa1c 100644
--- a/include/llvm/MC/MCParser/MCAsmParser.h
+++ b/include/llvm/MC/MCParser/MCAsmParser.h
@@ -55,8 +55,7 @@ public:
                                           InlineAsmIdentifierInfo &Info,
                                           bool IsUnevaluatedContext) = 0;
   virtual StringRef LookupInlineAsmLabel(StringRef Identifier, SourceMgr &SM,
-                                         SMLoc Location, bool Create)
-  { return nullptr; }
+                                         SMLoc Location, bool Create) = 0;
 
   virtual bool LookupInlineAsmField(StringRef Base, StringRef Member,
                                     unsigned &Offset) = 0;