[opaque pointer type] Explicitly specify type to CreateGEP

llvm-svn: 234032
diff --git a/clang/lib/CodeGen/CGObjCMac.cpp b/clang/lib/CodeGen/CGObjCMac.cpp
index 4ff5cf7..7ee0b07 100644
--- a/clang/lib/CodeGen/CGObjCMac.cpp
+++ b/clang/lib/CodeGen/CGObjCMac.cpp
@@ -3815,8 +3815,8 @@
   //  - Call setjmp on the exception data buffer.
   llvm::Constant *Zero = llvm::ConstantInt::get(CGF.Builder.getInt32Ty(), 0);
   llvm::Value *GEPIndexes[] = { Zero, Zero, Zero };
-  llvm::Value *SetJmpBuffer =
-    CGF.Builder.CreateGEP(ExceptionData, GEPIndexes, "setjmp_buffer");
+  llvm::Value *SetJmpBuffer = CGF.Builder.CreateGEP(
+      ObjCTypes.ExceptionDataTy, ExceptionData, GEPIndexes, "setjmp_buffer");
   llvm::CallInst *SetJmpResult = CGF.EmitNounwindRuntimeCall(
       ObjCTypes.getSetJmpFn(), SetJmpBuffer, "setjmp_result");
   SetJmpResult->setCanReturnTwice();