m68hc11.c (m68hc11_gen_highpart): Don't use gen_highpart.

	* config/m68hc11/m68hc11.c (m68hc11_gen_highpart): Don't use
	gen_highpart.

From-SVN: r44206

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f7af8bd48d7bf4f347b34fcef36b275b8b264122..f19c5f8266a7dc918265d5c39d5d31263600bd75 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2001-07-20  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
+
+       * config/m68hc11/m68hc11.c (m68hc11_gen_highpart): Don't use
+       gen_highpart.
+
 2001-07-20  Daniel Berlin  <dan@cgsoftware.com>
 
        * params.def: Change default max inline insns to 100.

diff --git a/gcc/config/m68hc11/m68hc11.c b/gcc/config/m68hc11/m68hc11.c
index cf5d968fff0447845547a239bdf5686c55c0e711..da7f490a587e27b7c80bdc53bb3b0e7798f3b018 100644 (file)
--- a/gcc/config/m68hc11/m68hc11.c
+++ b/gcc/config/m68hc11/m68hc11.c
@@ -1922,18 +1922,30 @@ m68hc11_gen_highpart (mode, x)
     }
 
   /* gen_highpart crashes when it is called with a SUBREG.  */
-  if (GET_CODE (x) == SUBREG && SUBREG_BYTE (x) != 0)
+  if (GET_CODE (x) == SUBREG)
     {
       return gen_rtx (SUBREG, mode, XEXP (x, 0), XEXP (x, 1));
     }
-  x = gen_highpart (mode, x);
+  if (GET_CODE (x) == REG)
+    {
+      if (REGNO (x) < FIRST_PSEUDO_REGISTER)
+        return gen_rtx (REG, mode, REGNO (x));
+      else
+        return gen_rtx_SUBREG (mode, x, 0);
+    }
 
-  /* Return a different rtx to avoid to share it in several insns
-     (when used by a split pattern).  Sharing addresses within
-     a MEM breaks the Z register replacement (and reloading).  */
   if (GET_CODE (x) == MEM)
-    x = copy_rtx (x);
-  return x;
+    {
+      x = change_address (x, mode, 0);
+
+      /* Return a different rtx to avoid to share it in several insns
+        (when used by a split pattern).  Sharing addresses within
+        a MEM breaks the Z register replacement (and reloading).  */
+      if (GET_CODE (x) == MEM)
+       x = copy_rtx (x);
+      return x;
+    }
+  abort ();
 }
 \f