(build_compound_expr): Use non_lvalue if value is 0.

From-SVN: r3277

(build_compound_expr): Use non_lvalue if value is 0.
From-SVN: r3277
439f6027 · Richard Stallman · d023bff9 · 439f6027
Commit 439f6027 authored Jan 19, 1993 by Richard Stallman
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gcc/c-typeck.c
+4 -1

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--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -3645,7 +3645,10 @@ build_compound_expr (list)
 	list = TREE_OPERAND (list, 0);
 #endif

-	return TREE_VALUE (list);
+      /* Don't let (0, 0) be null pointer constant.  */
+      if (integer_zerop (TREE_VALUE (list)))
+	return non_lvalue (TREE_VALUE (list));
+      return TREE_VALUE (list);
    }

  if (TREE_CHAIN (list) != 0 && TREE_CHAIN (TREE_CHAIN (list)) == 0)