2009-11-13 Andrey Belevantsev <abel@ispras.ru>

        * sched-deps.c (init_deps): New parameter lazy_reg_last.  Don't
        allocate reg_last when in case lazy_reg_last is true.
        (init_deps_reg_last): New.
        (free_deps): When max_reg is 0, this context is already freed.
        * sched-int.h (init_deps_reg_last): Export.
        (init_deps): Update prototype.
        * sched-ebb.c (schedule_ebb): Update the call to init_deps.
        * sched-rgn.c (sched_rgn_compute_dependencies): Likewise.
        * ddg.c (build_intra_loop_deps): Likewise.
        * sel-sched-ir.c (copy_deps_context, create_deps_context,
        reset_deps_context, deps_init_id): Likewise.
        (init_first_time_insn_data): Lazy allocate INSN_DEPS_CONTEXT.
        (free_data_for_scheduled_insn): New, break down from ...
        (free_first_time_insn_data): ... here.
        (has_dependence_p): Allocate reg_last now, when it is needed.
        (extend_insn_data): When maximal LUID is big enough, allocate
        per-insn data in smaller chunks.
        * sel-sched-ir.h (free_data_for_scheduled_insn): Export.
        * sel-sched.c (update_seqnos_and_stage): Free INSN_DEPS_CONTEXT
        in scheduled insn.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@154147 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 0 deletions

diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c
index 102dc19187f..05061c7ed71 100644
--- a/gcc/sel-sched.c
+++ b/gcc/sel-sched.c
@@ -7364,6 +7364,12 @@ update_seqnos_and_stage (int min_seqno, int max_seqno,
       gcc_assert (INSN_SEQNO (insn) < 0);
       INSN_SEQNO (insn) += highest_seqno_in_use + max_seqno - min_seqno + 2;
       gcc_assert (INSN_SEQNO (insn) <= new_hs);
+
+      /* When not pipelining, purge unneeded insn info on the scheduled insns.
+         For example, having reg_last array of INSN_DEPS_CONTEXT in memory may
+         require > 1GB of memory e.g. on limit-fnargs.c.  */
+      if (! pipelining_p)
+        free_data_for_scheduled_insn (insn);
     }
 
   ilist_clear (pscheduled_insns);