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* [Bug tree-optimization/90594] [9/10 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
@ 2020-03-12 11:58 ` jakub at gcc dot gnu.org
2020-06-23 6:29 ` [Bug tree-optimization/90594] [9/10/11 " hailey.chiu at sifive dot com
` (5 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-03-12 11:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90594
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.3 |9.4
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 9.3.0 has been released, adjusting target milestone.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/90594] [9/10/11 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
2020-03-12 11:58 ` [Bug tree-optimization/90594] [9/10 regression] Spurious popcount emitted jakub at gcc dot gnu.org
@ 2020-06-23 6:29 ` hailey.chiu at sifive dot com
2020-06-23 8:20 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: hailey.chiu at sifive dot com @ 2020-06-23 6:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90594
Hsiao-Hui Chiu <hailey.chiu at sifive dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hailey.chiu at sifive dot com
--- Comment #6 from Hsiao-Hui Chiu <hailey.chiu at sifive dot com> ---
Hi,
I got the same issue that my program is compiled with gcc-10.1 with riscv. Here
is my code,
C source:
void foo()
{
static long *a;
static int i;
static int sum;
sum = 0;
for ( i = 1 ; i < n ; i++)
{
sum += (*a--);
}
}
Compiling with riscv-gcc-10.1, with -Os,
riscv-gcc-10.1/riscv64-unknown-elf-gcc -Os -march=rv32imac -mabi=ilp32 -S -o
foo.s foo.c
Asm:
foo:
...skip...
.L6:
addi a7,a7,1
bgt a5,a7,.L7
li a4,0
ble a5,zero,.L9
li a4,-4
mul a4,a5,a4
addi a4,a4,4 #a = -4*n + 4
.L9:
add a4,a0,a4
bgt a5,zero,.L10
li a5,1
.L10:
beq t3,zero,.L5
sw a4,%lo(a.1)(a1)
sw a6,%lo(sum.3)(a2)
sw a5,%lo(i.2)(a3)
.L5:
ret
.L7:
lw a4,0(t1)
li t3,1
addi t1,t1,-4 #a--
add a6,a6,a4
j .L6
That .L6 segment is totally redundant. By inspecting the gcc trace, this is
happening at SCCP pass as this reported bug described. But, when I compiled the
bad_popcount function, I didn't see any redundant code emitted.
According previous comments, I know this is under fixing. I am just wondering
if there is anything updated between last May to now?
Thanks.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/90594] [9/10/11 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
2020-03-12 11:58 ` [Bug tree-optimization/90594] [9/10 regression] Spurious popcount emitted jakub at gcc dot gnu.org
2020-06-23 6:29 ` [Bug tree-optimization/90594] [9/10/11 " hailey.chiu at sifive dot com
@ 2020-06-23 8:20 ` rguenth at gcc dot gnu.org
2021-06-01 8:14 ` [Bug tree-optimization/90594] [9/10/11/12 " rguenth at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-06-23 8:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90594
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Sorry, I get easily distracted. The while the "prerequesite" is ready the
actual fix is not. I'll see whether to at least get that prerequesite
pushed.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/90594] [9/10/11/12 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2020-06-23 8:20 ` rguenth at gcc dot gnu.org
@ 2021-06-01 8:14 ` rguenth at gcc dot gnu.org
2022-05-27 9:40 ` [Bug tree-optimization/90594] [10/11/12/13 " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-06-01 8:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90594
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.4 |9.5
--- Comment #8 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] 7+ messages in thread
* [Bug tree-optimization/90594] [10/11/12/13 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2021-06-01 8:14 ` [Bug tree-optimization/90594] [9/10/11/12 " rguenth at gcc dot gnu.org
@ 2022-05-27 9:40 ` rguenth at gcc dot gnu.org
2022-06-28 10:37 ` jakub at gcc dot gnu.org
2023-07-07 10:35 ` [Bug tree-optimization/90594] [11/12/13/14 " rguenth at gcc dot gnu.org
6 siblings, 0 replies; 7+ 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=90594
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.5 |10.4
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/90594] [10/11/12/13 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2022-05-27 9:40 ` [Bug tree-optimization/90594] [10/11/12/13 " rguenth at gcc dot gnu.org
@ 2022-06-28 10:37 ` jakub at gcc dot gnu.org
2023-07-07 10:35 ` [Bug tree-optimization/90594] [11/12/13/14 " rguenth at gcc dot gnu.org
6 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90594
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #10 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] 7+ messages in thread
* [Bug tree-optimization/90594] [11/12/13/14 regression] Spurious popcount emitted
[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2022-06-28 10:37 ` jakub at gcc dot gnu.org
@ 2023-07-07 10:35 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 10:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90594
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.5 |11.5
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2023-07-07 10:35 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-90594-4@http.gcc.gnu.org/bugzilla/>
2020-03-12 11:58 ` [Bug tree-optimization/90594] [9/10 regression] Spurious popcount emitted jakub at gcc dot gnu.org
2020-06-23 6:29 ` [Bug tree-optimization/90594] [9/10/11 " hailey.chiu at sifive dot com
2020-06-23 8:20 ` rguenth at gcc dot gnu.org
2021-06-01 8:14 ` [Bug tree-optimization/90594] [9/10/11/12 " rguenth at gcc dot gnu.org
2022-05-27 9:40 ` [Bug tree-optimization/90594] [10/11/12/13 " rguenth at gcc dot gnu.org
2022-06-28 10:37 ` jakub at gcc dot gnu.org
2023-07-07 10:35 ` [Bug tree-optimization/90594] [11/12/13/14 " rguenth at gcc dot gnu.org
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