Comment change.

From-SVN: r5644

Comment change.
From-SVN: r5644
4b1d0fea · Richard Stallman · 9e20879e · 4b1d0fea
Commit 4b1d0fea authored Oct 06, 1993 by Richard Stallman
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gcc/tree.c
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--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -2180,7 +2180,8 @@ substitute_in_type (t, f, r)

 /* Stabilize a reference so that we can use it any number of times
   without causing its operands to be evaluated more than once.
-   Returns the stabilized reference.
+   Returns the stabilized reference.  This works by means of save_expr,
+   so see the caveats in the comments about save_expr.

   Also allows conversion expressions whose operands are references.
   Any other kind of expression is returned unchanged.  */