* sched-int.h (struct deps): New field libcall_block_tail_insn.

        * sched_deps.c (init_deps): Initialize libcall_block_tail_insn.
        * sched_deps.c (sched_analyze_insn): If libcall_block_tail_insn
        is set, then mark the current insn as being part of a libcall
        scheduling group.
        (sched_analyze): Set and clear libcall_block_tail_insn appropriately.

        * haifa-sched.c (schedule_block): Do not count USE or CLOBBER
        insns against the issue rate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@54251 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 0 deletions

diff --git a/gcc/sched-int.h b/gcc/sched-int.h
index 56c200e86fb..9ec916ea48e 100644
--- a/gcc/sched-int.h
+++ b/gcc/sched-int.h
@@ -86,6 +86,12 @@ struct deps
      the call.  */
   bool in_post_call_group_p;
 
+  /* Set to the tail insn of the outermost libcall block.
+
+     When nonzero, we will mark each insn processed by sched_analyze_insn
+     with SCHED_GROUP_P to ensure libcalls are scheduled as a unit.  */
+  rtx libcall_block_tail_insn;
+
   /* The maximum register number for the following arrays.  Before reload
      this is max_reg_num; after reload it is FIRST_PSEUDO_REGISTER.  */
   int max_reg;