(reg_scan_mark_refs): XEXP (x, 0) in EXPR_LIST may be 0.

From-SVN: r5739

(reg_scan_mark_refs): XEXP (x, 0) in EXPR_LIST may be 0.
From-SVN: r5739
7b18c3db · Richard Stallman · d01b0b7c · 7b18c3db
Commit 7b18c3db authored Oct 11, 1993 by Richard Stallman
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gcc/regclass.c
+2 -1

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--- a/gcc/regclass.c
+++ b/gcc/regclass.c
@@ -1584,7 +1584,8 @@ reg_scan_mark_refs (x, insn, note_flag)
      break;

    case EXPR_LIST:
-      reg_scan_mark_refs (XEXP (x, 0), insn, note_flag);
+      if (XEXP (x, 0))
+	reg_scan_mark_refs (XEXP (x, 0), insn, note_flag);
      if (XEXP (x, 1))
 	reg_scan_mark_refs (XEXP (x, 1), insn, note_flag);
      break;