public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug tree-optimization/91026] [9/10 Regression] switch expansion produces a jump table with trivial entries
[not found] <bug-91026-4@http.gcc.gnu.org/bugzilla/>
@ 2021-07-25 4:12 ` pinskia at gcc dot gnu.org
2022-06-28 10:37 ` [Bug tree-optimization/91026] [10 " jakub at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-25 4:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91026
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|switch expansion produces a |[9/10 Regression] switch
|jump table with trivial |expansion produces a jump
|entries |table with trivial entries
Target Milestone|--- |10.4
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In GCC 11, we do the right thing again.
On the trunk we even do even better by using btq:
cmpb $18, %dil
ja .L3
movl $348018, %eax
btq %rdi, %rax
setc %al
ret
.L3:
xorl %eax, %eax
ret
Note clang does not so good job:
addb $-1, %dil
cmpb $18, %dil
setb %cl
movzbl %dil, %eax
movl $174009, %edx # imm = 0x2A7B9
btl %eax, %edx
setb %al
andb %cl, %al
retq
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/91026] [10 Regression] switch expansion produces a jump table with trivial entries
[not found] <bug-91026-4@http.gcc.gnu.org/bugzilla/>
2021-07-25 4:12 ` [Bug tree-optimization/91026] [9/10 Regression] switch expansion produces a jump table with trivial entries pinskia at gcc dot gnu.org
@ 2022-06-28 10:37 ` jakub at gcc dot gnu.org
2023-07-07 8:30 ` rguenth at gcc dot gnu.org
2023-07-07 8:30 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 4+ 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=91026
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #5 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] 4+ messages in thread
* [Bug tree-optimization/91026] [10 Regression] switch expansion produces a jump table with trivial entries
[not found] <bug-91026-4@http.gcc.gnu.org/bugzilla/>
2021-07-25 4:12 ` [Bug tree-optimization/91026] [9/10 Regression] switch expansion produces a jump table with trivial entries pinskia at gcc dot gnu.org
2022-06-28 10:37 ` [Bug tree-optimization/91026] [10 " jakub at gcc dot gnu.org
@ 2023-07-07 8:30 ` rguenth at gcc dot gnu.org
2023-07-07 8:30 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 8:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91026
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |10.5.0
Known to work| |11.1.0
Target Milestone|10.5 |11.0
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed in GCC 11.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/91026] [10 Regression] switch expansion produces a jump table with trivial entries
[not found] <bug-91026-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2023-07-07 8:30 ` rguenth at gcc dot gnu.org
@ 2023-07-07 8:30 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 8:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91026
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-07-07 8:30 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <bug-91026-4@http.gcc.gnu.org/bugzilla/>
2021-07-25 4:12 ` [Bug tree-optimization/91026] [9/10 Regression] switch expansion produces a jump table with trivial entries pinskia at gcc dot gnu.org
2022-06-28 10:37 ` [Bug tree-optimization/91026] [10 " jakub at gcc dot gnu.org
2023-07-07 8:30 ` rguenth at gcc dot gnu.org
2023-07-07 8:30 ` rguenth at gcc dot gnu.org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).