From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 5 Jul 1994 22:27:27 +0000 (-0400)
Subject: (expand_increment): If pre-incrementing a promoted variable, don't
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3e073e7297d196adc6fdfb97e008ff5df29c7b7e;p=gcc.git

(expand_increment): If pre-incrementing a promoted variable, don't
adjust OP0 since the result won't be used.

From-SVN: r7655
---

diff --git a/gcc/expr.c b/gcc/expr.c
index 46be1f32acf..a2b24c4b051 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -8042,7 +8042,12 @@ expand_increment (exp, post)
      shared (it was made by the expand_expr call above).  */
 
   if (GET_CODE (op0) == SUBREG && SUBREG_PROMOTED_VAR_P (op0))
-    SUBREG_REG (op0) = copy_to_reg (SUBREG_REG (op0));
+    {
+      if (post)
+	SUBREG_REG (op0) = copy_to_reg (SUBREG_REG (op0));
+      else
+	bad_subreg = 1;
+    }
   else if (GET_CODE (op0) == SUBREG
 	   && GET_MODE_BITSIZE (GET_MODE (op0)) < BITS_PER_WORD)
     {