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/ScheduleDAGFast.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
index af73b28..4f6e59c 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
@@ -24,6 +24,7 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
 using namespace llvm;
 
 STATISTIC(NumUnfolds,    "Number of nodes unfolded");
@@ -568,8 +569,7 @@
       }
 
       if (!CurSU) {
-        assert(false && "Unable to resolve live physical register dependencies!");
-        abort();
+        LLVM_UNREACHABLE("Unable to resolve live physical register dependencies!");
       }
     }