Convert more assert(0)+abort() -> LLVM_UNREACHABLE,
and abort()/exit() -> llvm_report_error().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75363 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp
index f52546c..c9af474 100644
--- a/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -24,6 +24,7 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Transforms/Utils/Local.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/ValueHandle.h"
 #include <algorithm>
 using namespace llvm;
@@ -263,8 +264,7 @@
   case Instruction::Switch:    // Should remove entry
   default:
   case Instruction::Ret:       // Cannot happen, has no successors!
-    assert(0 && "Unhandled terminator instruction type in RemoveSuccessor!");
-    abort();
+    LLVM_UNREACHABLE("Unhandled terminator instruction type in RemoveSuccessor!");
   }
 
   if (NewTI)   // If it's a different instruction, replace.