Driver: avoid failing in the backend

Avoid failing in the backend when the rewrite map does not exist.  Rather check
that the map exists in the frontend before handing it off to the backend.  Add
the missing rewrite maps that the tests were referencing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@282379 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 3 deletions

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 7d1e0d091a..dcdc92a130 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -4213,9 +4213,14 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       Args.hasArg(options::OPT_frewrite_map_file_EQ)) {
     for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file,
                                       options::OPT_frewrite_map_file_EQ)) {
-      CmdArgs.push_back("-frewrite-map-file");
-      CmdArgs.push_back(A->getValue());
-      A->claim();
+      StringRef Map = A->getValue();
+      if (!llvm::sys::fs::exists(Map)) {
+        D.Diag(diag::err_drv_no_such_file) << Map;
+      } else {
+        CmdArgs.push_back("-frewrite-map-file");
+        CmdArgs.push_back(A->getValue());
+        A->claim();
+      }
     }
   }