From: Jim Wilson <wilson@cygnus.com>
Date: Wed, 7 Jul 1999 00:40:46 +0000 (-0600)
Subject: unroll.c (unroll_loop): Don't delete NOTE_INSN_DELETED_LABEL notes.
X-Git-Tag: prereleases/gcc-2.95-test~69
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=091a7c948645ef9a6b6628ca5ed7b730ad7ab1f8;p=thirdparty%2Fgcc.git

unroll.c (unroll_loop): Don't delete NOTE_INSN_DELETED_LABEL notes.

8
        * unroll.c (unroll_loop): Don't delete NOTE_INSN_DELETED_LABEL notes.

From-SVN: r27982
---

diff --git a/gcc/unroll.c b/gcc/unroll.c
index 7e584c961d06..9ac883a1d49e 100644
--- a/gcc/unroll.c
+++ b/gcc/unroll.c
@@ -1262,7 +1262,13 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before,
   insn = NEXT_INSN (copy_start);
   while (insn != safety_label)
     {
-      if (insn != start_label)
+      /* ??? We can't delete a NOTE_INSN_DELETED_LABEL unless we fix the
+	 DECL_RTL field of the associated LABEL_DECL to point to (one of)
+	 the new copies of the label.  Otherwise, we hit an abort in
+	 dwarfout.c/dwarf2out.c.  */
+      if (insn != start_label
+	  && ! (GET_CODE (insn) == NOTE
+		&& NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL))
 	insn = delete_insn (insn);
       else
 	insn = NEXT_INSN (insn);