From: Jim Wilson <wilson@gcc.gnu.org>
Date: Sat, 25 Feb 1995 02:40:03 +0000 (-0800)
Subject: (relax_delay_slots): When searching for next CODE_LABEL,
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9e94dc88d3ec245c45cfdb4575ccb6132bc9a207;p=gcc.git

(relax_delay_slots): When searching for next CODE_LABEL,

use next_real_insn not next_active_insn.

From-SVN: r9075
---

diff --git a/gcc/reorg.c b/gcc/reorg.c
index 653c477235c..6c72f4c32af 100644
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -3865,7 +3865,12 @@ relax_delay_slots (first)
 	  /* If this jump goes to another unconditional jump, thread it, but
 	     don't convert a jump into a RETURN here.  */
 	  trial = follow_jumps (target_label);
-	  trial = prev_label (next_active_insn (trial));
+	  /* We use next_real_insn instead of next_active_insn, so that
+	     the special USE insns emitted by reorg won't be ignored.
+	     If they are ignored, then they will get deleted if target_label
+	     is now unreachable, and that would cause mark_target_live_regs
+	     to fail.  */
+	  trial = prev_label (next_real_insn (trial));
 	  if (trial == 0 && target_label != 0)
 	    trial = find_end_label ();