Revert this patch:

-       * haifa-sched.c (schedule_block): Do not count USE and CLOBBER
-       insns against the issue rate.
-
-       * sched-deps.c (sched_create_groups_for_libcalls): New function.
-       (sched_analyze): Use it.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@54015 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8b9cce8..11e769a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -63,17 +63,6 @@
        (SUBTARGET_EXTRA_SPECS): Define.
        (CPP_SPEC): Remove.
 
-2002-05-29  Dale Johannesen  <dalej@apple.com>
-            Michael Matz  <matz@kde.org>
-            David Edelsohn  <edesohn@gnu.org>
-            Jeff Law <law@redhat.com>
-
-       * haifa-sched.c (schedule_block): Do not count USE and CLOBBER
-       insns against the issue rate.
-
-       * sched-deps.c (sched_create_groups_for_libcalls): New function.
-       (sched_analyze): Use it.
-
 2002-05-29  Chris Lattner  <sabre@nondot.org>
 
         * ssa.c (rename_insn_1): Rename uses of undefined registers to

diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index a03b9b3..63a3135 100644 (file)
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -2179,10 +2179,7 @@ schedule_block (b, rgn_n_insns)
            can_issue_more =
              (*targetm.sched.variable_issue) (sched_dump, sched_verbose,
                                               insn, can_issue_more);
-         /* A naked CLOBBER or USE generates no instruction, so do
-            not count them against the issue rate.  */
-         else if (GET_CODE (PATTERN (insn)) != USE
-                  && GET_CODE (PATTERN (insn)) != CLOBBER)
+         else
            can_issue_more--;
 
          schedule_insn (insn, &ready, clock_var);

diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index 7154635..0afb21b 100644 (file)
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -88,7 +88,6 @@ static void flush_pending_lists PARAMS ((struct deps *, rtx, int, int));
 static void sched_analyze_1 PARAMS ((struct deps *, rtx, rtx));
 static void sched_analyze_2 PARAMS ((struct deps *, rtx, rtx));
 static void sched_analyze_insn PARAMS ((struct deps *, rtx, rtx, rtx));
-static void sched_create_groups_for_libcalls PARAMS ((rtx, rtx));
 static rtx group_leader PARAMS ((rtx));
 
 static rtx get_condition PARAMS ((rtx));
@@ -1211,57 +1210,6 @@ sched_analyze_insn (deps, x, insn, loop_notes)
     }
 }
 
-/* Find any libcall sequences between HEAD and TAIL inclusive; set
-   SCHED_GROUP_P appropriately for such sequences.  */
-
-static void
-sched_create_groups_for_libcalls (head, tail)
-     rtx head, tail;
-{
-  rtx insn;
-  int tail_seen_p = 0;
-
-  for (insn = head;; insn = NEXT_INSN (insn))
-    {
-      rtx link, end_seq, set, r0, note;
-      if (INSN_P (insn) && GET_CODE (PATTERN (insn)) == CLOBBER
-         && (r0 = XEXP (PATTERN (insn), 0), GET_CODE (r0) == REG)
-         && (link = find_reg_note (insn, REG_LIBCALL, NULL_RTX)) != 0
-         && (end_seq = XEXP (link, 0)) != 0
-         && INSN_P (end_seq)
-         && (set = single_set (end_seq)) != 0
-         && SET_DEST (set) == r0 && SET_SRC (set) == r0
-         && (note = find_reg_note (end_seq, REG_EQUAL, NULL_RTX)) != 0)
-       {
-         /* We found a libcall block between insn and end_seq.
-            The inner insns should be scheduled in a block.  */
-         rtx inner;
-         /* Paranoia.  */
-         if (insn == tail)
-           tail_seen_p = 1;
-         /* We don't want to set this flag on the initial clobber, because
-            the semantic of SCHED_GROUP_P is to make insn be scheduled
-            together with the previous insn.  */
-         for (inner = NEXT_INSN (insn); inner; inner = NEXT_INSN (inner))
-           {
-             if (INSN_P (inner))
-               set_sched_group_p (inner);
-             /* Paranoia.  */
-             if (inner == tail)
-               tail_seen_p = 1;
-             if (inner == end_seq)
-               break;
-           }
-         /* We should be able to skip the whole lib-call block.
-            Remember that one NEXT_INSN is done in the loop-iteration.  */
-         insn = end_seq;
-       }
-      if (insn == tail || tail_seen_p)
-       break;
-    }
-  return;
-}
-
 /* Analyze every insn between HEAD and TAIL inclusive, creating LOG_LINKS
    for every dependency.  */
 
@@ -1409,10 +1357,6 @@ sched_analyze (deps, head, tail)
        {
          if (current_sched_info->use_cselib)
            cselib_finish ();
-
-         if (! reload_completed)
-           sched_create_groups_for_libcalls (head, tail);
-
          return;
        }
     }