From: Richard Kenner <kenner@gcc.gnu.org>
Date: Wed, 21 Oct 1992 11:33:55 +0000 (-0400)
Subject: (do_store_flag): Ensure we don't get confused when emit_store_flag
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d39985fabf60fc4c42acf88a039a9b0bca027cc2;p=gcc.git

(do_store_flag): Ensure we don't get confused when emit_store_flag
fails and an operand has a QUEUED.

From-SVN: r2540
---

diff --git a/gcc/expr.c b/gcc/expr.c
index 632c3505b75..1641a9c3045 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -7160,8 +7160,14 @@ do_store_flag (exp, target, mode, only_cheap)
   if (target == 0)
     target = gen_reg_rtx (mode);
 
-  result = emit_store_flag (target, code, op0, op1, operand_mode,
-			    unsignedp, 1);
+  /* Pass copies of OP0 and OP1 in case they contain a QUEUED.  This is safe
+     because, if the emit_store_flag does anything it will succeed and
+     OP0 and OP1 will not be used subsequently.  */
+
+  result = emit_store_flag (target, code,
+			    queued_subexp_p (op0) ? copy_rtx (op0) : op0,
+			    queued_subexp_p (op1) ? copy_rtx (op1) : op1,
+			    operand_mode, unsignedp, 1);
 
   if (result)
     {