rs6000.md (movsf): Don't convert a SUBREG of the function return register into a plain REG until...

* config/rs6000/rs6000.md (movsf): Don't convert a SUBREG
of the function return register into a plain REG until
after function inlining is done.

From-SVN: r30224

gcc/ChangeLog

+Thu Oct 28 10:20:02 1999  Geoffrey Keating  <geoffk@cygnus.com>
+
+	* config/rs6000/rs6000.md (movsf): Don't convert a SUBREG
+	of the function return register into a plain REG until
+	after function inlining is done.
+
 Wed Oct 27 15:21:46 1999  Richard Henderson  <rth@cygnus.com>
 
 	* jump.c (jump_optimize_1): If we did cross-jumping, and

gcc/config/rs6000/rs6000.md

@@ -6256,7 +6256,9 @@
      reg.  So expand it.  */
   if (GET_CODE (operands[0]) == SUBREG
       && GET_CODE (SUBREG_REG (operands[0])) == REG
-      && REGNO (SUBREG_REG (operands[0])) < FIRST_PSEUDO_REGISTER)
+      && REGNO (SUBREG_REG (operands[0])) < FIRST_PSEUDO_REGISTER
+      && (! REG_FUNCTION_VALUE_P (SUBREG_REG (operands[0]))
+	  || ! rtx_equal_function_value_matters))
     operands[0] = alter_subreg (operands[0]);
   if (GET_CODE (operands[1]) == SUBREG
       && GET_CODE (SUBREG_REG (operands[1])) == REG