[Driver] Don't pass -ffile-compilation-dir through to cc1

[phosek]

Summary

This is a driver only flag so it has to be expanded when invoking cc1.

[MaskRay]

LGTM.

clang/lib/Driver/ToolChains/Clang.cpp

getFramePointerKind(const ArgList &Args, const llvm::Triple &Triple) {
   return CodeGenOptions::FramePointerKind::None;
 }
 
 /// Add a CC1 option to specify the debug compilation directory.
 static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs,
                                const llvm::vfs::FileSystem &VFS) {
   if (Arg *A = Args.getLastArg(options::OPT_ffile_compilation_dir_EQ,
                                options::OPT_fdebug_compilation_dir_EQ)) {
+    if (A->getOption().matches(options::OPT_ffile_compilation_dir_EQ))
+      CmdArgs.push_back(Args.MakeArgString(Twine("-fdebug-compilation-dir=") +
+                                           A->getValue()));
+    else
       A->render(Args, CmdArgs);
   } else if (llvm::ErrorOr<std::string> CWD =
                  VFS.getCurrentWorkingDirectory()) {
     CmdArgs.push_back(Args.MakeArgString("-fdebug-compilation-dir=" + *CWD));
   }
 }
 
 /// Add a CC1 and CC1AS option to specify the debug file path prefix map.
 static void addDebugPrefixMapArg(const Driver &D, const ArgList &Args, ArgStringList &CmdArgs) {
if (!ProfileGenerateArg)
           << "-fcoverage-mapping"
           << "-fprofile-instr-generate";
 
     CmdArgs.push_back("-fcoverage-mapping");
   }
 
   if (Arg *A = Args.getLastArg(options::OPT_ffile_compilation_dir_EQ,
                                options::OPT_fcoverage_compilation_dir_EQ)) {
+    if (A->getOption().matches(options::OPT_ffile_compilation_dir_EQ))
+      CmdArgs.push_back(Args.MakeArgString(
+          Twine("-fcoverage-compilation-dir=") + A->getValue()));
+    else
       A->render(Args, CmdArgs);
   } else if (llvm::ErrorOr<std::string> CWD =
                  D.getVFS().getCurrentWorkingDirectory()) {
-    Args.MakeArgString("-fcoverage-compilation-dir=" + *CWD);
+    CmdArgs.push_back(Args.MakeArgString("-fcoverage-compilation-dir=" + *CWD));
   }
 
   if (Args.hasArg(options::OPT_fprofile_exclude_files_EQ)) {
     auto *Arg = Args.getLastArg(options::OPT_fprofile_exclude_files_EQ);
     if (!Args.hasArg(options::OPT_coverage))
       D.Diag(clang::diag::err_drv_argument_only_allowed_with)
           << "-fprofile-exclude-files="
           << "--coverage";