Refactor a bit of duplicated code to useIntegratedAs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177299 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 0b121b4..bd48b48 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -1296,9 +1296,7 @@
   // bottom up, so what we are actually looking for is an assembler job with a
   // compiler input.
 
-  if (C.getArgs().hasFlag(options::OPT_integrated_as,
-                          options::OPT_no_integrated_as,
-                          TC->IsIntegratedAssemblerDefault()) &&
+  if (TC->useIntegratedAs(C.getArgs()) &&
       !C.getArgs().hasArg(options::OPT_save_temps) &&
       isa<AssembleJobAction>(JA) &&
       Inputs->size() == 1 && isa<CompileJobAction>(*Inputs->begin())) {