+2013-05-15 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
+
+ * config/s390/s390.c (s390_register_move_cost): Don't impose the
+ FPR<->GPR move cost penalty if ldgr/lgdr can be used.
+
2013-05-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/57275
s390_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
reg_class_t from, reg_class_t to)
{
-/* On s390, copy between fprs and gprs is expensive. */
- if ((reg_classes_intersect_p (from, GENERAL_REGS)
- && reg_classes_intersect_p (to, FP_REGS))
- || (reg_classes_intersect_p (from, FP_REGS)
- && reg_classes_intersect_p (to, GENERAL_REGS)))
+ /* On s390, copy between fprs and gprs is expensive as long as no
+ ldgr/lgdr can be used. */
+ if ((!TARGET_Z10 || GET_MODE_SIZE (mode) != 8)
+ && ((reg_classes_intersect_p (from, GENERAL_REGS)
+ && reg_classes_intersect_p (to, FP_REGS))
+ || (reg_classes_intersect_p (from, FP_REGS)
+ && reg_classes_intersect_p (to, GENERAL_REGS))))
return 10;
return 1;