re PR rtl-optimization/48596 ([SH] unable to find a register to spill in class 'FPUL_REGS')

	PR target/48596
	PR target/48806
	* config/sh/sh.c (sh_register_move_cost): Increase cost between
	GENERAL_REGS and FP_REGS for SImode.

From-SVN: r184844

gcc/ChangeLog

+2012-03-02  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/48596
+	PR target/48806
+	* config/sh/sh.c (sh_register_move_cost): Increase cost between
+	GENERAL_REGS and FP_REGS for SImode.
+
 2012-03-02  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/49486

gcc/config/sh/sh.c

@@ -11517,8 +11517,15 @@ sh_register_move_cost (enum machine_mode mode,
        && REGCLASS_HAS_GENERAL_REG (srcclass))
       || (REGCLASS_HAS_GENERAL_REG (dstclass)
 	  && REGCLASS_HAS_FP_REG (srcclass)))
-    return ((TARGET_SHMEDIA ? 4 : TARGET_FMOVD ? 8 : 12)
-	    * ((GET_MODE_SIZE (mode) + 7) / 8U));
+    {
+      /* Discourage trying to use fp regs for a pointer.  This also
+	 discourages fp regs with SImode because Pmode is an alias
+	 of SImode on this target.  See PR target/48596.  */
+      int addend = (mode == Pmode) ? 40 : 0;
+
+      return (((TARGET_SHMEDIA ? 4 : TARGET_FMOVD ? 8 : 12) + addend)
+	      * ((GET_MODE_SIZE (mode) + 7) / 8U));
+    }
 
   if ((dstclass == FPUL_REGS
        && REGCLASS_HAS_GENERAL_REG (srcclass))