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Revert: 

2008-03-05  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/i386-modes.def: Use 4 byte alignment on DI for
        32bit host.

        2008-03-19  Uros Bizjak  <ubizjak@gmail.com>

        PR target/35496
        * stor-layout.c (update_alignment_for_field): Set minimum alignment
        of the underlying type of a MS bitfield layout to the natural
        alignment of the type.

        2008-03-22  Uros Bizjak  <ubizjak@gmail.com>

        * config/i386/i386.c (assign_386_stack_local): Align DImode slots
        to their natural alignment to avoid store forwarding stalls.

From-SVN: r133461
This commit is contained in:
Uros Bizjak 2008-03-23 13:07:34 +01:00 committed by Uros Bizjak
parent 4705677421
commit 808e68bbc8
4 changed files with 21 additions and 18 deletions
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21
gcc/ChangeLog
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@ -1,3 +1,23 @@
2008-03-23 Uros Bizjak <ubizjak@gmail.com>
Revert:
2008-03-05 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386-modes.def: Use 4 byte alignment on DI for
32bit host.
2008-03-19 Uros Bizjak <ubizjak@gmail.com>
PR target/35496
* stor-layout.c (update_alignment_for_field): Set minimum alignment
of the underlying type of a MS bitfield layout to the natural
alignment of the type.
2008-03-22 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (assign_386_stack_local): Align DImode slots
to their natural alignment to avoid store forwarding stalls.
2008-03-22 Richard Guenther <rguenther@suse.de> 2008-03-22 Richard Guenther <rguenther@suse.de>
* tree-cfg.c (verify_expr): Recurse again for invariant addresses. * tree-cfg.c (verify_expr): Recurse again for invariant addresses.
@ -2680,7 +2700,6 @@
2008-02-17 Uros Bizjak <ubizjak@gmail.com> 2008-02-17 Uros Bizjak <ubizjak@gmail.com>
Revert: Revert:
2008-02-15 Uros Bizjak <ubizjak@gmail.com> 2008-02-15 Uros Bizjak <ubizjak@gmail.com>
* config/i386/sfp-machine.h (CMPtype): Define as typedef using * config/i386/sfp-machine.h (CMPtype): Define as typedef using
libgcc_cmp_return mode. libgcc_cmp_return mode.

4
gcc/config/i386/i386-modes.def
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@ -17,10 +17,6 @@ You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */ <http://www.gnu.org/licenses/>. */
/* In 32bit, DI mode uses 32bit registers. Only 4 byte alignment
is needed. */
ADJUST_ALIGNMENT (DI, (TARGET_64BIT || TARGET_ALIGN_DOUBLE) ? 8 : 4);
/* The x86_64 ABI specifies both XF and TF modes. /* The x86_64 ABI specifies both XF and TF modes.
XFmode is __float80 is IEEE extended; TFmode is __float128 XFmode is __float80 is IEEE extended; TFmode is __float128
is IEEE quad. */ is IEEE quad. */

11
gcc/config/i386/i386.c
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@ -16315,7 +16315,6 @@ rtx
assign_386_stack_local (enum machine_mode mode, enum ix86_stack_slot n) assign_386_stack_local (enum machine_mode mode, enum ix86_stack_slot n)
{ {
struct stack_local_entry *s; struct stack_local_entry *s;
int align;
gcc_assert (n < MAX_386_STACK_LOCALS); gcc_assert (n < MAX_386_STACK_LOCALS);
@ -16326,19 +16325,11 @@ assign_386_stack_local (enum machine_mode mode, enum ix86_stack_slot n)
if (s->mode == mode && s->n == n) if (s->mode == mode && s->n == n)
return copy_rtx (s->rtl); return copy_rtx (s->rtl);
/* Align DImode slots to their natural alignment
to avoid store forwarding stalls. */
if (mode == DImode
&& (GET_MODE_BITSIZE (mode) > GET_MODE_ALIGNMENT (mode)))
align = GET_MODE_BITSIZE (mode);
else
align = 0;
s = (struct stack_local_entry *) s = (struct stack_local_entry *)
ggc_alloc (sizeof (struct stack_local_entry)); ggc_alloc (sizeof (struct stack_local_entry));
s->n = n; s->n = n;
s->mode = mode; s->mode = mode;
s->rtl = assign_stack_local (mode, GET_MODE_SIZE (mode), align); s->rtl = assign_stack_local (mode, GET_MODE_SIZE (mode), 0);
s->next = ix86_stack_locals; s->next = ix86_stack_locals;
ix86_stack_locals = s; ix86_stack_locals = s;

3
gcc/stor-layout.c
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@ -699,9 +699,6 @@ update_alignment_for_field (record_layout_info rli, tree field,
&& ! integer_zerop (DECL_SIZE (rli->prev_field))))) && ! integer_zerop (DECL_SIZE (rli->prev_field)))))
{ {
unsigned int type_align = TYPE_ALIGN (type); unsigned int type_align = TYPE_ALIGN (type);
unsigned int type_size
= tree_low_cst (TYPE_SIZE (type), 1);
type_align = MAX (type_align, type_size);
type_align = MAX (type_align, desired_align); type_align = MAX (type_align, desired_align);
if (maximum_field_alignment != 0) if (maximum_field_alignment != 0)
type_align = MIN (type_align, maximum_field_alignment); type_align = MIN (type_align, maximum_field_alignment);