Teach ARM isLegalAddressingMode to handle unknown type without crashing. This fixes pr2589.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 15c225a..afc7ebc 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -1598,7 +1598,7 @@
 /// by AM is legal for this target, for a load/store of the specified type.
 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM, 
                                               const Type *Ty) const {
-  if (!isLegalAddressImmediate(AM.BaseOffs, getValueType(Ty), Subtarget))
+  if (!isLegalAddressImmediate(AM.BaseOffs, getValueType(Ty, true), Subtarget))
     return false;
   
   // Can never fold addr of global into load/store.