From: James Van Artsdalen <jrv@gnu.org>
Date: Thu, 23 Sep 1993 06:07:19 +0000 (+0000)
Subject: (record_label_references): Don't follow a null label reference chain.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9f5cad058274f4fdb14939db3470c89a94c21a24;p=gcc.git

(record_label_references): Don't follow a null label reference chain.

From-SVN: r5429
---

diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index 33bd2689d76..3cf49dedf64 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -406,7 +406,9 @@ record_label_references (insn, pat)
 
       /* Don't make a duplicate in the code_label's chain. */
 
-      for (ref = LABEL_REFS (label); ref != label; ref = LABEL_NEXTREF (ref))
+      for (ref = LABEL_REFS (label);
+	   ref && ref != label;
+	   ref = LABEL_NEXTREF (ref))
 	if (CONTAINING_INSN (ref) == insn)
 	  return;