[5/7] v10: Update x86 backend
H.J. Lu
hjl.tools@gmail.com
Tue Jul 8 17:09:00 GMT 2008
Hi Jan, Uros,
Here is the stack alignment change for x86 backend. OK for trunk?
Thanks.
--
H.J.
---
2008-07-08 Joey Ye <joey.ye@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (ix86_force_align_arg_pointer_string):
Break long line.
(ix86_gen_andsp): New.
(ix86_user_incoming_stack_boundary): Likewise.
(ix86_default_incoming_stack_boundary): Likewise.
(ix86_incoming_stack_boundary): Likewise.
(ix86_can_eliminate): Likewise.
(find_drap_reg): Likewise.
(ix86_update_stack_boundary): Likewise.
(ix86_get_drap_rtx): Likewise.
(ix86_finalize_stack_realign_flags): Likewise.
(TARGET_UPDATE_STACK_BOUNDARY): Likewise.
(TARGET_GET_DRAP_RTX): Likewise.
(override_options): Overide option value for new options.
(ix86_function_ok_for_sibcall): Remove check for
force_align_arg_pointer.
(ix86_handle_cconv_attribute): Likewise.
(ix86_function_regparm): Likewise.
(setup_incoming_varargs_64): Don't set stack_alignment_needed
here.
(ix86_va_start): Replace virtual_incoming_args_rtx with
crtl->args.internal_arg_pointer.
(ix86_select_alt_pic_regnum): Check DRAP register.
(ix86_save_reg): Replace force_align_arg_pointer with drap_reg.
(ix86_compute_frame_layout): Compute frame layout wrt stack
realignment.
(ix86_internal_arg_pointer): Just return
virtual_incoming_args_rtx.
(ix86_expand_prologue): Decide if stack realignment is needed
and generate prologue code accordingly.
(ix86_expand_epilogue): Generate epilogue code wrt stack
realignment is really needed or not.
* config/i386/i386.h (MAIN_STACK_BOUNDARY): New.
(ABI_STACK_BOUNDARY): Likewise.
(PREFERRED_STACK_BOUNDARY_DEFAULT): Likewise.
(STACK_REALIGN_DEFAULT): Likewise.
(INCOMING_STACK_BOUNDARY): Likewise.
(MAX_STACK_ALIGNMENT): Likewise.
(ix86_incoming_stack_boundary): Likewise.
(FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN): Removed.
(REAL_PIC_OFFSET_TABLE_REGNUM): Updated to use BX_REG.
(CAN_ELIMINATE): Defined with ix86_can_eliminate.
(machine_function): Remove force_align_arg_pointer.
* config/i386/i386.md (BX_REG): New.
(R13_REG): Likewise.
* config/i386/i386.opt (mforce_drap): New.
(mincoming-stack-boundary): Likewise.
(mstackrealign): Add Init(-1).
* config/i386/i386-protos.h (ix86_can_eliminate): New
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