2004-08-12 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/s390.c (struct s390_frame_layout): New struct as element
of struct machine_function.
(cfun->machine->frame_size): Moved into cfun->machine->frame_layout and
changed all uses.
(cfun->machine->save_fprs_p): Replaced by cfun_save_high_fprs and
changed all uses.
(cfun_frame_layout, cfun_save_high_fprs_p, cfun_gprs_save_area_size)
(cfun_set_fpr_bit, cfun_fpr_bit_p): New macros.
(s390_frame_area, s390_register_info): New functions.
(s390_optimize_prolog): Renamed to s390_optimize_prologue. Added check
for base register.
(s390_return_addr_rtx, s390_return_address_offset)
(s390_va_start, s390_gimplify_va_arg)
(s390_emit_prologue, s390_emit_epilogue): Adjusted for new stack
layouts.
(s390_frame_info): Functionality partly moved to s390_register_info.
Made adaptions for new stack layout.
(save_gprs, restore_gprs): Changed meaning of second parameter and
adapted all callers.
* config/s390/s390.h (s390_backchain_string): New global variable.
(MASK_BACKCHAIN): Removed definition.
(TARGET_BACKCHAIN): Changed check.
(TARGET_KERNEL_BACKCHAIN): New macro.
(TARGET_SWITCHES): Removed entries of "backchain" and "no-backchain".
(TARGET_OPTIONS): Added "backchain", "no-backchain" and
"kernel-backchain".
(DYNAMIC_CHAIN_ADDRESS): Adjusted for new stack layouts.
* config/s390/s390.md ("allocate_stack"): Added TARGET_KERNEL_BACKCHAIN
as condition. Adjusted for new stack layout.
* doc/invoke.texi: Added documentation for new option
"-mkernel-backchain" and adjusted documentation of "-mbackchain" and
"-mno-backchain".
From-SVN: r85882
