From: Jim Wilson <wilson@gcc.gnu.org>
Date: Mon, 9 Aug 1993 19:37:23 +0000 (-0700)
Subject: (schedule_insns): Don't emit a NOTE at the end of the last basic block if...
X-Git-Tag: misc/cutover-egcs-0~8822
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=211b330fd8f17c6be56de8048edb5ab0a1633220;p=thirdparty%2Fgcc.git

(schedule_insns): Don't emit a NOTE at the end of the last basic block if...

(schedule_insns): Don't emit a NOTE at the end of the last
basic block if that would put it between a JUMP_INSN and a BARRIER.

From-SVN: r5121
---

diff --git a/gcc/sched.c b/gcc/sched.c
index 9da35d0d7002..48b13ff3c1c1 100644
--- a/gcc/sched.c
+++ b/gcc/sched.c
@@ -4497,9 +4497,17 @@ schedule_insns (dump_file)
 
   /* Schedule each basic block, block by block.  */
 
-  if (NEXT_INSN (basic_block_end[n_basic_blocks-1]) == 0
-      || (GET_CODE (basic_block_end[n_basic_blocks-1]) != NOTE
-	  && GET_CODE (basic_block_end[n_basic_blocks-1]) != CODE_LABEL))
+  /* ??? Add a NOTE after the last insn of the last basic block.  It is not
+     known why this is done.  */
+
+  insn = basic_block_end[n_basic_blocks-1];
+  if (NEXT_INSN (insn) == 0
+      || (GET_CODE (insn) != NOTE
+	  && GET_CODE (insn) != CODE_LABEL
+	  /* Don't emit a NOTE if it would end up between an unconditional
+	     jump and a BARRIER.  */
+	  && ! (GET_CODE (insn) == JUMP_INSN
+		&& GET_CODE (NEXT_INSN (insn)) == BARRIER)))
     emit_note_after (NOTE_INSN_DELETED, basic_block_end[n_basic_blocks-1]);
 
   for (b = 0; b < n_basic_blocks; b++)