rtlanal.c (rtx_cost): Assign cost of 0 to a SUBREG when modes are tieable.

2005-01-17  Mark Dettinger  <dettinge@de.ibm.com>

	* rtlanal.c (rtx_cost): Assign cost of 0 to a SUBREG
	when modes are tieable.

From-SVN: r93763

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 47d6a63..06995dd 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2005-01-17  Mark Dettinger  <dettinge@de.ibm.com>
+
+       * rtlanal.c (rtx_cost): Assign cost of 0 to a SUBREG
+       when modes are tieable.
+
 2005-01-17  Ranjit Mathew  <rmathew@hotmail.com>
 
        * gthr-posix.h (__gthread_active_p): Use pthread_cancel instead

diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index abfa7b2..2cae7ed 100644 (file)
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -3270,6 +3270,7 @@ rtx_cost (rtx x, enum rtx_code outer_code ATTRIBUTE_UNUSED)
       return 0;
 
     case SUBREG:
+      total = 0;
       /* If we can't tie these modes, make this expensive.  The larger
         the mode, the more expensive it is.  */
       if (! MODES_TIEABLE_P (GET_MODE (x), GET_MODE (SUBREG_REG (x))))