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

lib/Analysis/InstCount.cpp

@@ -16,6 +16,7 @@
 #include "llvm/Pass.h"
 #include "llvm/Function.h"
 #include "llvm/Support/Compiler.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/InstVisitor.h"
 #include "llvm/Support/Streams.h"
 #include "llvm/ADT/Statistic.h"
@@ -47,7 +48,7 @@ namespace {
 
     void visitInstruction(Instruction &I) {
       cerr << "Instruction Count does not know about " << I;
-      abort();
+      llvm_unreachable();
     }
   public:
     static char ID; // Pass identification, replacement for typeid