[llvm] r239456 - fix crash

[Alexei Starovoitov]

Author: ast
Date: Tue Jun  9 22:06:06 2015
New Revision: 239456

URL: http://llvm.org/viewvc/llvm-project?rev=239456&view=rev
Log:
fix crash

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

This fixes regression caused by r238424.

Modified:
    llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp

Modified: llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp?rev=239456&r1=239455&r2=239456&view=diff
==============================================================================
--- llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp (original)
+++ llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp Tue Jun  9 22:06:06 2015
@@ -519,7 +519,8 @@ void RuntimeDyldELF::resolveMIPSRelocati
 }
 
 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;