lto: Fix missing cleanup with incremental LTO.

Incremental LTO disabled cleanup of output_files since they have to
persist in ltrans cache.
This unintetionally also kept temporary early debug "*.debug.temp.o"
files.

Bootstrapped/regtested on x86_64-linux.
Ok for trunk?

lto-plugin/ChangeLog:

	* lto-plugin.c (cleanup_handler): Keep only files in ltrans
	cache.

1 files changed, 11 insertions, 0 deletions

diff --git a/lto-plugin/lto-plugin.c b/lto-plugin/lto-plugin.c
index 3d27255..09d5441 100644
--- a/lto-plugin/lto-plugin.c
+++ b/lto-plugin/lto-plugin.c
@@ -945,6 +945,17 @@ cleanup_handler (void)
   if (!flto_incremental)
     for (i = 0; i < num_output_files; i++)
       maybe_unlink (output_files[i]);
+  else
+    {
+      /* Keep files in ltrans cache.  */
+      const char* suffix = ".ltrans.o";
+      for (i = 0; i < num_output_files; i++)
+	{
+	  int offset = strlen (output_files[i]) - strlen (suffix);
+	  if (offset < 0 || strcmp (output_files[i] + offset, suffix))
+	    maybe_unlink (output_files[i]);
+	}
+    }
 
   free_2 ();
   return LDPS_OK;