(fold): Don't do anything with evaluated SAVE_EXPR.

From-SVN: r12185

(fold): Don't do anything with evaluated SAVE_EXPR.
From-SVN: r12185
5fd7f37d · Richard Kenner · 6db59ad5 · 5fd7f37d
Commit 5fd7f37d authored Jun 06, 1996 by Richard Kenner
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gcc/fold-const.c
+3 -2

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--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -3100,8 +3100,9 @@ fold (expr)

  int wins = 1;

-  /* Don't try to process an RTL_EXPR since its operands aren't trees.  */
-  if (code == RTL_EXPR)
+  /* Don't try to process an RTL_EXPR since its operands aren't trees. 
+     Likewise for a SAVE_EXPR that's already been evaluated.  */
+  if (code == RTL_EXPR || (code == SAVE_EXPR && SAVE_EXPR_RTL (t)) != 0)
    return t;

  /* Return right away if already constant.  */