* [Bug tree-optimization/89049] [8/9/10/11 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
@ 2021-03-11 14:10 ` rguenth at gcc dot gnu.org
2021-05-14 9:51 ` [Bug tree-optimization/89049] [9/10/11/12 " jakub at gcc dot gnu.org
` (6 subsequent siblings)
7 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-03-11 14:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|rguenth at gcc dot gnu.org |unassigned at gcc dot gnu.org
Known to fail| |11.0
Last reconfirmed|2019-01-25 00:00:00 |2021-3-11
Status|ASSIGNED |NEW
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Re-confirmed. Note the same in-order reduction is profitable with SSE:
0x3704d70 *_3 1 times scalar_load costs 12 in body
0x3704d70 _4 + r_16 1 times scalar_stmt costs 12 in body
0x3825d80 _4 + r_16 4 times vec_to_scalar costs 16 in body
0x3825d80 _4 + r_16 4 times scalar_stmt costs 48 in body
0x3825d80 *_3 1 times unaligned_load (misalign -1) costs 12 in body
t4.c:1:53: note: Cost model analysis:
Vector inside of loop cost: 76
Vector prologue cost: 0
Vector epilogue cost: 0
Scalar iteration cost: 24
Scalar outside cost: 0
Vector outside cost: 0
prologue iterations: 0
epilogue iterations: 0
Calculated minimum iters for profitability: 0
bar:
.LFB0:
.cfi_startproc
leaq 4096(%rdi), %rax
pxor %xmm1, %xmm1
.p2align 4,,10
.p2align 3
.L2:
movups (%rdi), %xmm0
addq $16, %rdi
addss %xmm0, %xmm1
movaps %xmm0, %xmm2
shufps $85, %xmm0, %xmm2
addss %xmm2, %xmm1
movaps %xmm0, %xmm2
unpckhps %xmm0, %xmm2
shufps $255, %xmm0, %xmm0
addss %xmm2, %xmm1
addss %xmm0, %xmm1
cmpq %rdi, %rax
jne .L2
cvttss2sil %xmm1, %eax
ret
iff the code in forwprop that decomposes loads of BLKmode vectors used only
by BIT_FIELD_REFs would be relaxed to cover all modes and TARGET_MEM_REFs
that are simple we'd get
.L2:
addl $1, %eax
addss (%rdi), %xmm0
addss 4(%rdi), %xmm0
addq $16, %rdi
addss -8(%rdi), %xmm0
addss -4(%rdi), %xmm0
cmpl $256, %eax
jne .L2
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/89049] [9/10/11/12 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
2021-03-11 14:10 ` [Bug tree-optimization/89049] [8/9/10/11 Regression] Unexpected vectorization rguenth at gcc dot gnu.org
@ 2021-05-14 9:51 ` jakub at gcc dot gnu.org
2021-06-01 8:12 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
7 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-14 9:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.5 |9.4
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 8 branch is being closed.
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/89049] [9/10/11/12 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
2021-03-11 14:10 ` [Bug tree-optimization/89049] [8/9/10/11 Regression] Unexpected vectorization rguenth at gcc dot gnu.org
2021-05-14 9:51 ` [Bug tree-optimization/89049] [9/10/11/12 " jakub at gcc dot gnu.org
@ 2021-06-01 8:12 ` rguenth at gcc dot gnu.org
2022-05-27 9:40 ` [Bug tree-optimization/89049] [10/11/12/13 " rguenth at gcc dot gnu.org
` (4 subsequent siblings)
7 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-06-01 8:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.4 |9.5
--- Comment #15 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] 8+ messages in thread* [Bug tree-optimization/89049] [10/11/12/13 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2021-06-01 8:12 ` rguenth at gcc dot gnu.org
@ 2022-05-27 9:40 ` rguenth at gcc dot gnu.org
2022-06-28 10:36 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
7 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-27 9:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.5 |10.4
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/89049] [10/11/12/13 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2022-05-27 9:40 ` [Bug tree-optimization/89049] [10/11/12/13 " rguenth at gcc dot gnu.org
@ 2022-06-28 10:36 ` jakub at gcc dot gnu.org
2023-05-30 8:19 ` [Bug tree-optimization/89049] [10/11/12/13/14 " pinskia at gcc dot gnu.org
` (2 subsequent siblings)
7 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #17 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] 8+ messages in thread* [Bug tree-optimization/89049] [10/11/12/13/14 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2022-06-28 10:36 ` jakub at gcc dot gnu.org
@ 2023-05-30 8:19 ` pinskia at gcc dot gnu.org
2023-07-07 10:34 ` [Bug tree-optimization/89049] [11/12/13/14 " rguenth at gcc dot gnu.org
2024-03-10 5:56 ` [Bug tree-optimization/89049] [11 " law at gcc dot gnu.org
7 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-05-30 8:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
--- Comment #18 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the code generation in GCC 12+ seems decent.
The IR changed in fact.
GCC 11 has:
vect__4.5_19 = MEM <vector(4) float> [(float *)_2];
stmp_r_11.6_20 = BIT_FIELD_REF <vect__4.5_19, 32, 0>;
stmp_r_11.6_21 = r_16 + stmp_r_11.6_20;
stmp_r_11.6_22 = BIT_FIELD_REF <vect__4.5_19, 32, 32>;
stmp_r_11.6_23 = stmp_r_11.6_21 + stmp_r_11.6_22;
stmp_r_11.6_24 = BIT_FIELD_REF <vect__4.5_19, 32, 64>;
stmp_r_11.6_25 = stmp_r_11.6_23 + stmp_r_11.6_24;
stmp_r_11.6_26 = BIT_FIELD_REF <vect__4.5_19, 32, 96>;
While GCC 12+ does:
_3 = &MEM <vector(4) float> [(float *)_2];
stmp_r_11.7_26 = BIT_FIELD_REF <MEM <vector(4) float> [(float *)_3], 32, 96>;
stmp_r_11.7_24 = BIT_FIELD_REF <MEM <vector(4) float> [(float *)_3], 32, 64>;
stmp_r_11.7_22 = BIT_FIELD_REF <MEM <vector(4) float> [(float *)_3], 32, 32>;
stmp_r_11.7_20 = BIT_FIELD_REF <MEM <vector(4) float> [(float *)_3], 32, 0>;
Which I think was done by r12-2728-g2724d1bba6b364 .
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/89049] [11/12/13/14 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2023-05-30 8:19 ` [Bug tree-optimization/89049] [10/11/12/13/14 " pinskia at gcc dot gnu.org
@ 2023-07-07 10:34 ` rguenth at gcc dot gnu.org
2024-03-10 5:56 ` [Bug tree-optimization/89049] [11 " law at gcc dot gnu.org
7 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 10:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.5 |11.5
--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/89049] [11 Regression] Unexpected vectorization
[not found] <bug-89049-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2023-07-07 10:34 ` [Bug tree-optimization/89049] [11/12/13/14 " rguenth at gcc dot gnu.org
@ 2024-03-10 5:56 ` law at gcc dot gnu.org
7 siblings, 0 replies; 8+ messages in thread
From: law at gcc dot gnu.org @ 2024-03-10 5:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89049
Jeffrey A. Law <law at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at gcc dot gnu.org
Summary|[11/12/13/14 Regression] |[11 Regression] Unexpected
|Unexpected vectorization |vectorization
--- Comment #20 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Per c#18.
^ permalink raw reply [flat|nested] 8+ messages in thread