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/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 868a5b5..eb9dccb 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -33,6 +33,7 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
 #include <algorithm>
 #include <set>
@@ -2258,8 +2259,7 @@
     if (!LegalOperations || TLI.isCondCodeLegal(NotCC, LHS.getValueType())) {
       switch (N0.getOpcode()) {
       default:
-        assert(0 && "Unhandled SetCC Equivalent!");
-        abort();
+        LLVM_UNREACHABLE("Unhandled SetCC Equivalent!");
       case ISD::SETCC:
         return DAG.getSetCC(N->getDebugLoc(), VT, LHS, RHS, NotCC);
       case ISD::SELECT_CC: