From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 5 Mar 1996 14:32:16 +0000 (-0500)
Subject: (record_label_references): Check for undefined label.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=13684373ccee26cd479e7fde77994b71ccee3623;p=gcc.git

(record_label_references): Check for undefined label.

From-SVN: r11454
---

diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index 7e5728108dd..95f968e8334 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -483,6 +483,10 @@ record_label_references (insn, pat)
       if (GET_CODE (label) != CODE_LABEL)
 	abort ();
 
+      /* If this is an undefined label, LABEL_REFS (label) contains garbage. */
+      if (INSN_UID (label) == 0)
+	return;
+
       /* Don't make a duplicate in the code_label's chain. */
 
       for (ref = LABEL_REFS (label);