* [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
@ 2020-04-10 10:57 ` clyon at gcc dot gnu.org
2020-04-21 15:20 ` vmakarov at gcc dot gnu.org
` (7 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: clyon at gcc dot gnu.org @ 2020-04-10 10:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #24 from Christophe Lyon <clyon at gcc dot gnu.org> ---
With today's trunk, I still see the same problem:
history_expand_line_internal:
@ args = 0, pretend = 0, frame = 8
@ frame_needed = 0, uses_anonymous_args = 0
push {r0, r1, r2, r4, r5, r6, r7, lr}
ldr r3, .L3
ldr r6, .L3+4
ldr r7, [r3]
ldr r3, [r6] ; ; <--- load of 'hist_verify' onto r3
movs r5, r0
str r3, [sp, #4] ; <--- Spill
movs r3, #0
str r3, [r6]
bl pre_process_line
ldr r3, [sp, #4] ; <--- reload
movs r4, r0
adds r7, r7, r3
str r7, [r6]
cmp r5, r0
bne .L1
bl str_len
adds r0, r0, #1
bl x_malloc
movs r1, r4
bl str_cpy
movs r4, r0
.L1:
@ sp needed
movs r0, r4
pop {r1, r2, r3, r4, r5, r6, r7, pc}
.L4:
.align 2
.L3:
.word a1
.word hist_verify
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
2020-04-10 10:57 ` [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance regression due to poor register allocation on Cortex-M0 clyon at gcc dot gnu.org
@ 2020-04-21 15:20 ` vmakarov at gcc dot gnu.org
2020-04-21 16:14 ` clyon at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: vmakarov at gcc dot gnu.org @ 2020-04-21 15:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
--- Comment #25 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Sorry, I can not reproduce this. With today trunk I have for pr45701-1.c (-Os
-mthumb):
history_expand_line_internal:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
push {r3, r4, r5, r6, r7, lr}
mov r4, r0
ldr r5, .L3
ldr r3, .L3+4
ldr r7, [r5]
ldr r6, [r3]
movs r3, #0
str r3, [r5]
bl pre_process_line
cmp r4, r0
add r6, r6, r7
str r6, [r5]
bne .L1
bl str_len
adds r0, r0, #1
bl x_malloc
mov r1, r4
pop {r3, r4, r5, r6, r7, lr}
b str_cpy
.L1:
pop {r3, r4, r5, r6, r7, pc}
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
2020-04-10 10:57 ` [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance regression due to poor register allocation on Cortex-M0 clyon at gcc dot gnu.org
2020-04-21 15:20 ` vmakarov at gcc dot gnu.org
@ 2020-04-21 16:14 ` clyon at gcc dot gnu.org
2020-04-21 19:03 ` vmakarov at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: clyon at gcc dot gnu.org @ 2020-04-21 16:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
--- Comment #26 from Christophe Lyon <clyon at gcc dot gnu.org> ---
For what CPU did you configure GCC?
With today's trunk I still see the same code as in comment #24.
I can get the same code as you have in comment #25 if I force -mcpu=cortex-a9.
The bug report is about cortex-m0, so you either need to configure GCC
--with-cpu=cortex-m0 or use -mcpu=cortex-m0
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2020-04-21 16:14 ` clyon at gcc dot gnu.org
@ 2020-04-21 19:03 ` vmakarov at gcc dot gnu.org
2021-05-14 9:48 ` [Bug rtl-optimization/70164] [9/10/11/12 " jakub at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: vmakarov at gcc dot gnu.org @ 2020-04-21 19:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
--- Comment #27 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #26)
> For what CPU did you configure GCC?
> With today's trunk I still see the same code as in comment #24.
>
> I can get the same code as you have in comment #25 if I force
> -mcpu=cortex-a9.
>
> The bug report is about cortex-m0, so you either need to configure GCC
> --with-cpu=cortex-m0 or use -mcpu=cortex-m0
Ok. Thank you. I've reproduced this with -mcpu=cortex-m0.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [9/10/11/12 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2020-04-21 19:03 ` vmakarov at gcc dot gnu.org
@ 2021-05-14 9:48 ` jakub at gcc dot gnu.org
2021-06-01 8:07 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-14 9:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.5 |9.4
--- Comment #28 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 8 branch is being closed.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [9/10/11/12 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2021-05-14 9:48 ` [Bug rtl-optimization/70164] [9/10/11/12 " jakub at gcc dot gnu.org
@ 2021-06-01 8:07 ` rguenth at gcc dot gnu.org
2022-05-27 9:36 ` [Bug rtl-optimization/70164] [10/11/12/13 " rguenth at gcc dot gnu.org
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8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-06-01 8:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.4 |9.5
--- Comment #29 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9.4 is being released, retargeting bugs to GCC 9.5.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [10/11/12/13 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2021-06-01 8:07 ` rguenth at gcc dot gnu.org
@ 2022-05-27 9:36 ` rguenth at gcc dot gnu.org
2022-06-28 10:32 ` jakub at gcc dot gnu.org
2023-07-07 10:31 ` [Bug rtl-optimization/70164] [11/12/13/14 " rguenth at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-27 9:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.5 |10.4
--- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [10/11/12/13 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2022-05-27 9:36 ` [Bug rtl-optimization/70164] [10/11/12/13 " rguenth at gcc dot gnu.org
@ 2022-06-28 10:32 ` jakub at gcc dot gnu.org
2023-07-07 10:31 ` [Bug rtl-optimization/70164] [11/12/13/14 " rguenth at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #31 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug rtl-optimization/70164] [11/12/13/14 Regression] Code/performance regression due to poor register allocation on Cortex-M0
[not found] <bug-70164-4@http.gcc.gnu.org/bugzilla/>
` (7 preceding siblings ...)
2022-06-28 10:32 ` jakub at gcc dot gnu.org
@ 2023-07-07 10:31 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 10:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70164
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.5 |11.5
--- Comment #32 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.
^ permalink raw reply [flat|nested] 9+ messages in thread