Initial commit for Europar 2021 GCC versiondevel/autopar_europar_2021

This was the version of GCC used in the Europar 2021 paper with regard
to GCC paralelism. Future commits are possible, so look in the paper the
commit hash of the version was used.

5 files changed, 26 insertions, 12 deletions

diff --git a/gcc/.cgraphunit.c.swp b/gcc/.cgraphunit.c.swp
new file mode 100644
index 00000000000..83c78e6c4ca
--- /dev/null
+++ b/gcc/.cgraphunit.c.swp
diff --git a/gcc/.lto-cgraph.c.swo b/gcc/.lto-cgraph.c.swo
new file mode 100644
index 00000000000..a87c6dbf6b0
--- /dev/null
+++ b/gcc/.lto-cgraph.c.swo
diff --git a/gcc/cgraphunit.c b/gcc/cgraphunit.c
index 73e4bed3b61..12d2d19e944 100644
--- a/gcc/cgraphunit.c
+++ b/gcc/cgraphunit.c
@@ -2794,10 +2794,22 @@ maybe_compile_in_parallel (void)
   bool jobserver = false;
   bool job_auto = false;
   int num_jobs = -1;
+  unsigned long long insns = 0;
+  cgraph_node *cnode;
 
   if (!flag_parallel_jobs || !split_outputs)
     return false;
 
+  FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (cnode)
+    {
+      ipa_size_summary *ss = ipa_size_summaries->get (cnode);
+      if (!cnode->inlined_to && ss)
+	insns += ss->size;
+    }
+
+  if (insns < (unsigned long long) param_min_partition_size)
+    return false;
+
   if (!strcmp (flag_parallel_jobs, "auto"))
     {
       jobserver = jobserver_initialize ();
diff --git a/gcc/gcc.c b/gcc/gcc.c
index c276a11ca7a..ba942c0e3e4 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -3405,14 +3405,7 @@ append_split_outputs (extra_arg_storer *storer,
 	  argv[argc++] = extra_argument;
 	}
 
-      if (have_c)
-	{
-	  argv[argc++] = "-fPIE";
-	  argv[argc++] = "-fPIC";
-	}
-
       argv[argc]   = NULL;
-
       commands[0].argv = argv;
     }
 
@@ -3977,7 +3970,7 @@ execute (void)
   /* FIXME: Interact with GNU Jobserver if necessary.  */
 
   commands_batch = commands;
-  n = flag_parallel_jobs? 1: n_commands;
+  n = n_commands;
 
   for (int i = 0; i < n_commands; i += n)
     {
diff --git a/gcc/ipa-split.c b/gcc/ipa-split.c
index 973e72cea04..09e9eb93264 100644
--- a/gcc/ipa-split.c
+++ b/gcc/ipa-split.c
@@ -1909,8 +1909,12 @@ pass_split_functions::gate (function *)
 {
   /* When doing profile feedback, we want to execute the pass after profiling
      is read.  So disable one in early optimization.  */
-  return (flag_partial_inlining
-	  && !profile_arc_flag && !flag_branch_probabilities);
+
+  /* Disabled due to an issue regarding how the partitioner applier
+     handle clones generated by this pass.  */
+  /*return (flag_partial_inlining
+	  && !profile_arc_flag && !flag_branch_probabilities); */
+  return false;
 }
 
 } // anon namespace
@@ -1968,8 +1972,13 @@ pass_feedback_split_functions::gate (function *)
 {
   /* We don't need to split when profiling at all, we are producing
      lousy code anyway.  */
-  return (flag_partial_inlining
-	  && flag_branch_probabilities);
+
+  /* Disabled due to an issue regarding how the partitioner applier
+     handle clones generated by this pass.  */
+  /* return (flag_partial_inlining
+	  && flag_branch_probabilities); */
+
+  return false;
 }
 
 } // anon namespace