PR rtl-optimization/58960

        * haifa-sched.c (alloc_global_sched_pressure_data): New,
        factored out from ...
        (sched_init): ... here.
        (free_global_sched_pressure_data): New, factored out from ...
        (sched_finish): ... here.
        * sched-int.h (free_global_sched_pressure_data): Declare.
        * sched-rgn.c (nr_regions_initial): New static global.
        (haifa_find_rgns): Initialize it.
        (schedule_region): Disable sched-pressure for the newly
        generated regions.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@207832 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/sched-rgn.c b/gcc/sched-rgn.c
index 406dc1facd6..0573b6a6e8f 100644
--- a/gcc/sched-rgn.c
+++ b/gcc/sched-rgn.c
@@ -79,6 +79,9 @@ static int is_cfg_nonregular (void);
 /* Number of regions in the procedure.  */
 int nr_regions = 0;
 
+/* Same as above before adding any new regions.  */
+static int nr_regions_initial = 0;
+
 /* Table of region descriptions.  */
 region *rgn_table = NULL;
 
@@ -1064,6 +1067,7 @@ haifa_find_rgns (void)
 	BLOCK_TO_BB (bb->index) = 0;
       }
 
+  nr_regions_initial = nr_regions;
   free (max_hdr);
   free (degree);
   free (stack);
@@ -2991,6 +2995,15 @@ schedule_region (int rgn)
 
   rgn_n_insns = 0;
 
+  /* Do not support register pressure sensitive scheduling for the new regions
+     as we don't update the liveness info for them.  */
+  if (rgn >= nr_regions_initial)
+    {
+      if (sched_pressure != SCHED_PRESSURE_NONE)
+	free_global_sched_pressure_data ();
+      sched_pressure = SCHED_PRESSURE_NONE;
+    }
+
   rgn_setup_region (rgn);
 
   /* Don't schedule region that is marked by