Switch assert(0/false) llvm_unreachable.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140367 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprComplex.cpp b/lib/CodeGen/CGExprComplex.cpp
index a92a7ad..13c96d4 100644
--- a/lib/CodeGen/CGExprComplex.cpp
+++ b/lib/CodeGen/CGExprComplex.cpp
@@ -103,7 +103,7 @@
     
   ComplexPairTy VisitStmt(Stmt *S) {
     S->dump(CGF.getContext().getSourceManager());
-    assert(0 && "Stmt can't have complex result type!");
+    llvm_unreachable("Stmt can't have complex result type!");
     return ComplexPairTy();
   }
   ComplexPairTy VisitExpr(Expr *S);