From a38e1982227952be8c6117d4c33b3041efa67815 Mon Sep 17 00:00:00 2001
From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Date: Wed, 10 Jun 2015 03:06:06 +0000
Subject: [PATCH] fix crash

fix segfault by checking for UnknownArch, since
getArchTypePrefix() will return nullptr for UnknownArch.

This fixes regression caused by r238424.

llvm-svn: 239456
---
 llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index b4a34e8..5c39c59 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -519,7 +519,8 @@ void RuntimeDyldELF::resolveMIPSRelocation(const SectionEntry &Section,
 }
 
 void RuntimeDyldELF::setMipsABI(const ObjectFile &Obj) {
-  if (!StringRef(Triple::getArchTypePrefix(Arch)).equals("mips")) {
+  if (Arch == Triple::UnknownArch ||
+      !StringRef(Triple::getArchTypePrefix(Arch)).equals("mips")) {
     IsMipsO32ABI = false;
     IsMipsN64ABI = false;
     return;
-- 
2.7.4