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rs6000.c (rs6000_stack_info): Don't zero offsets when not saving registers.

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* config/rs6000/rs6000.c (rs6000_stack_info): Don't zero offsets
	when not saving registers.
	(debug_stack_info): Adjust to omit printing unused offsets,
	as before.
	(rs6000_emit_epilogue): Adjust use_backchain_to_restore_sp
	expression.

From-SVN: r223424
This commit is contained in:
Alan Modra 2015-05-20 10:45:59 +09:30 • committed by Alan Modra
parent ca5db45b8a
commit 8b07bbe71b
2 changed files with 19 additions and 33 deletions
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9
gcc/ChangeLog
View file

@ -1,3 +1,12 @@
2015-05-20 Alan Modra <amodra@gmail.com>
* config/rs6000/rs6000.c (rs6000_stack_info): Don't zero offsets
when not saving registers.
(debug_stack_info): Adjust to omit printing unused offsets,
as before.
(rs6000_emit_epilogue): Adjust use_backchain_to_restore_sp
expression.
2015-05-19 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
PR c++/65835

43
gcc/config/rs6000/rs6000.c
View file

@ -22013,31 +22013,6 @@ rs6000_stack_info (void)
else
info_ptr->push_p = non_fixed_size > (TARGET_32BIT ? 220 : 288);
/* Zero offsets if we're not saving those registers. */
if (info_ptr->fp_size == 0)
info_ptr->fp_save_offset = 0;
if (info_ptr->gp_size == 0)
info_ptr->gp_save_offset = 0;
if (! TARGET_ALTIVEC_ABI || info_ptr->altivec_size == 0)
info_ptr->altivec_save_offset = 0;
/* Zero VRSAVE offset if not saved and restored. */
if (! TARGET_ALTIVEC_VRSAVE || info_ptr->vrsave_mask == 0)
info_ptr->vrsave_save_offset = 0;
if (! TARGET_SPE_ABI
|| info_ptr->spe_64bit_regs_used == 0
|| info_ptr->spe_gp_size == 0)
info_ptr->spe_gp_save_offset = 0;
if (! info_ptr->lr_save_p)
info_ptr->lr_save_offset = 0;
if (! info_ptr->cr_save_p)
info_ptr->cr_save_offset = 0;
return info_ptr;
}
@ -22143,28 +22118,28 @@ debug_stack_info (rs6000_stack_t *info)
if (info->calls_p)
fprintf (stderr, "\tcalls_p = %5d\n", info->calls_p);
if (info->gp_save_offset)
if (info->gp_size)
fprintf (stderr, "\tgp_save_offset = %5d\n", info->gp_save_offset);
if (info->fp_save_offset)
if (info->fp_size)
fprintf (stderr, "\tfp_save_offset = %5d\n", info->fp_save_offset);
if (info->altivec_save_offset)
if (info->altivec_size)
fprintf (stderr, "\taltivec_save_offset = %5d\n",
info->altivec_save_offset);
if (info->spe_gp_save_offset)
if (info->spe_gp_size == 0)
fprintf (stderr, "\tspe_gp_save_offset = %5d\n",
info->spe_gp_save_offset);
if (info->vrsave_save_offset)
if (info->vrsave_size)
fprintf (stderr, "\tvrsave_save_offset = %5d\n",
info->vrsave_save_offset);
if (info->lr_save_offset)
if (info->lr_save_p)
fprintf (stderr, "\tlr_save_offset = %5d\n", info->lr_save_offset);
if (info->cr_save_offset)
if (info->cr_save_p)
fprintf (stderr, "\tcr_save_offset = %5d\n", info->cr_save_offset);
if (info->varargs_save_offset)
@ -24735,7 +24710,9 @@ rs6000_emit_epilogue (int sibcall)
here will not trigger at the moment; We don't actually need a
frame pointer for alloca, but the generic parts of the compiler
give us one anyway. */
use_backchain_to_restore_sp = (info->total_size > 32767 - info->lr_save_offset
use_backchain_to_restore_sp = (info->total_size + (info->lr_save_p
? info->lr_save_offset
: 0) > 32767
|| (cfun->calls_alloca
&& !frame_pointer_needed));
restore_lr = (info->lr_save_p