From: Richard Stallman <rms@gnu.org>
Date: Mon, 21 Sep 1992 13:33:38 +0000 (+0000)
Subject: (make_extraction): Make test whether to use AND or
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cc4710825df88d6d2475ad25d7decaf02758cd4d;p=gcc.git

(make_extraction): Make test whether to use AND or
{SIGN,ZERO}_EXTRACT depend on UNSIGNEDP.

From-SVN: r2202
---

diff --git a/gcc/combine.c b/gcc/combine.c
index bc1cc9b949c..05c7c94aa1d 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -4631,10 +4631,10 @@ make_extraction (mode, inner, pos, pos_rtx, len,
 				 mode, new));
     }
 
-  /* Unless this isin a COMPARE or we have a funny memory reference,
-     don't do anything with field extracts starting at the low-order
-     bit since they are simple AND operations.  */
-  if (pos == 0 && ! in_dest && ! in_compare && ! spans_byte)
+  /* Unless this is a COMPARE or we have a funny memory reference,
+     don't do anything with zero-extending field extracts starting at
+     the low-order bit since they are simple AND operations.  */
+  if (pos == 0 && ! in_dest && ! in_compare && ! spans_byte && unsignedp)
     return 0;
 
   /* Get the mode to use should INNER be a MEM, the mode for the position,