Driver: Forward -Wl, and -Xlink arguments when using windows linker

Differential Revision: http://llvm-reviews.chandlerc.com/D1394

llvm-svn: 188346

clang/lib/Driver/Tools.cpp

@@ -6597,7 +6597,8 @@ void visualstudio::Link::ConstructJob(Compilation &C, const JobAction &JA,
        it = Inputs.begin(), ie = Inputs.end(); it != ie; ++it) {
     if (it->isFilename())
       CmdArgs.push_back(it->getFilename());
-    // FIXME: Forward -Wl, etc.
+    else
+      it->getInputArg().renderAsInput(Args, CmdArgs);
   }
 
   const char *Exec =

clang/test/Driver/Xlinker-args.c

@@ -14,3 +14,11 @@
 // DARWIN-NOT: --no-demangle
 // DARWIN: "one" "two" "three" "four"
 // LINUX: "--no-demangle" "one" "two" "three" "four"
+
+// Check that we forward '-Xlinker' and '-Wl,' on Windows.
+// RUN: %clang -target i686-pc-win32 -### \
+// RUN:   -Xlinker one -Wl,two %s 2>&1 | \
+// RUN:   FileCheck -check-prefix=WIN %s
+// WIN: link.exe
+// WIN: "one"
+// WIN: "two"