Do not call append_arg_storer if -S is provided

The flag -fsplit-outputs= should not be appended to cc1 if -S is
provided, as there is no easy way to do parallelism here.

gcc/ChangeLog
2020-05-07  Giuliano Belinassi  <giuliano.belinassi@usp.br>

	* gcc.c (execute): Don't call append_arg_storer if -S is provided.
	(have_S): New variable.

2 files changed, 13 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 40a525e..a7b152e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2020-05-07  Giuliano Belinassi  <giuliano.belinassi@usp.br>
 
+	* gcc.c (execute): Don't call append_arg_storer if -S is provided.
+	(have_S): New variable.
+
+2020-05-07  Giuliano Belinassi  <giuliano.belinassi@usp.br>
+
 	* common.opt (fsplit-output=): New option.
 	* gcc.c (execute): Call append_split_outputs.
 	(is_compiler): New function.
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 98752e5..0e2972f 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -1955,6 +1955,9 @@ static int have_o = 0;
 /* Was the option -E passed.  */
 static int have_E = 0;
 
+/* Was the option -S passes.  */
+static int have_S = 0;
+
 /* Pointer to output file name passed in with -o. */
 static const char *output_file = 0;
 
@@ -3326,7 +3329,8 @@ execute (void)
     }
 #endif
 
-  append_split_outputs (&extra_args, commands, n_commands);
+  if (!have_S)
+    append_split_outputs (&extra_args, commands, n_commands);
 
   /* Run each piped subprocess.  */
 
@@ -4688,6 +4692,9 @@ process_command (unsigned int decoded_options_count,
       switch (decoded_options[j].opt_index)
 	{
 	case OPT_S:
+	  have_S = 1;
+	  have_c = 1;
+	  break;
 	case OPT_c:
 	case OPT_E:
 	  have_c = 1;