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

From-SVN: r5429

(record_label_references): Don't follow a null label reference chain.
From-SVN: r5429
9f5cad05 · James Van Artsdalen · a05afb95 · 9f5cad05
Commit 9f5cad05 authored Sep 23, 1993 by James Van Artsdalen
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gcc/reg-stack.c
+3 -1

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--- 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;