Driver: Don't forward any -g options to GCC, when using it to drive the
assembler.
 - Fixes PR6218, hopefully.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110111 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index d1dafe9..19a6a92 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1600,6 +1600,11 @@
          it = Args.begin(), ie = Args.end(); it != ie; ++it) {
     Arg *A = *it;
     if (A->getOption().hasForwardToGCC()) {
+      // Don't forward any -g arguments to assembly steps.
+      if (isa<AssembleJobAction>(JA) &&
+          A->getOption().matches(options::OPT_g_Group))
+        continue;
+
       // It is unfortunate that we have to claim here, as this means
       // we will basically never report anything interesting for
       // platforms using a generic gcc, even if we are just using gcc