re PR rtl-optimization/42389 (ICE in advance_state_on_fence with sel-schd for 175.vpr)

        PR rtl-optimization/42389
        * sel-sched.c (advance_one_cycle): Set FENCE_ISSUE_MORE
        to can_issue_more.
        (advance_state_on_fence): Likewise.
        (sel_target_adjust_priority): Print debug output only when
        sched_verbose >= 4, not 2.
        (get_expr_cost): Do not issue all unique insns on the next cycle.
        (fill_insns): Initialize can_issue_more from the value saved
        with the fence.
        * sel-sched-ir.c (flist_add): New parameter issue_more.
        Init FENCE_ISSUE_MORE with it.
        (merge_fences): Likewise.
        (init_fences): Update call to flist_add.
        (add_to_fences, add_clean_fence_to_fences)
        (add_dirty_fence_to_fences): Likewise.
        (move_fence_to_fences): Update call to merge_fences.
        (invoke_reorder_hooks): Do not reset can_issue_more on insns from
        sched groups.
        * sel-sched-ir.h (struct _fence): New field issue_more.
        (FENCE_ISSUE_MORE): New accessor macro.

From-SVN: r155895

1 files changed, 87 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr42389.c b/gcc/testsuite/gcc.dg/pr42389.c
new file mode 100644
index 00000000000..c398012f2b4
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr42389.c
@@ -0,0 +1,87 @@
+/* { dg-do compile { target powerpc*-*-* ia64-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fselective-scheduling -fsel-sched-pipelining -fsched-pressure" } */
+
+struct s_linked_f_pointer
+{
+  struct s_linked_f_pointer *next;
+  float *fptr;
+};
+struct s_trace
+{
+  int index;
+};
+struct s_rr_cost
+{
+  float base_cost;
+  float acc_cost;
+};
+extern int num_nets;
+extern struct s_trace **trace_head;
+extern struct s_rr_cost *rr_cost;
+struct s_rr_route
+{
+  float cost;
+};
+static int heap_tail;
+extern struct s_linked_f_pointer *rr_modified_head;
+extern struct s_rr_route *rr_route;
+
+void
+empty_heap (void)
+{
+  heap_tail = 1;
+}
+
+void
+reset_path_costs (void)
+{
+  struct s_linked_f_pointer *mod_ptr;
+  if (rr_modified_head != ((void *) 0))
+    {
+      mod_ptr = rr_modified_head;
+      while (mod_ptr->next != ((void *) 0))
+	{
+	  *(mod_ptr->fptr) = 1.e30;
+	  mod_ptr = mod_ptr->next;
+	}
+      rr_modified_head = ((void *) 0);
+    }
+}
+
+static void
+route_net (int inet)
+{
+  int i;
+  for (i = 1; i < inet; i++)
+    reset_path_costs ();
+  empty_heap ();
+  reset_path_costs ();
+}
+
+void
+pathfinder_update_one_cost (int inet, float pres_fac, float acc_fac)
+{
+  struct s_trace *tptr;
+  int inode = 0;
+
+  tptr = trace_head[inet];
+  inode = tptr->index;
+  rr_route[inode].cost = rr_cost[inode].base_cost + rr_cost[inode].acc_cost;
+}
+
+int
+try_route (int n, float x, float y)
+{
+  int inet, itry;
+  float pres_fac;
+  for (itry = 1; itry <= n; itry++)
+    {
+      for (inet = 0; inet < num_nets; inet++)
+	{
+	  route_net (inet);
+	  pathfinder_update_one_cost (inet, pres_fac, x);
+	}
+      pres_fac *= y;
+    }
+}
+