https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105643
--- Comment #3 from Levy Hsu ---
I forgot to mention, that the build time also increased by 128% on the Intel
platform above, but no performance improvement was spotted.
I'll check the objdump and see what happens.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105643
--- Comment #4 from Levy Hsu ---
Created attachment 52995
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52995&action=edit
-fopt-info-vec before that commit
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105643
--- Comment #5 from Levy Hsu ---
Created attachment 52996
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52996&action=edit
-fopt-info-vec after this commit
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105643
--- Comment #6 from Levy Hsu ---
Created attachment 52997
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52997&action=edit
Vec different seems to related SetPixelPacket
: target
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at levyhsu dot com
Target Milestone: ---
Related bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54346
After I merge two VEC_PERM_EXPR in the match.pd, I found that two
__builtin_shuffle actually generate better
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at levyhsu dot com
Target Milestone: ---
when compiled with march_native_ofast_lto (-march=native -Ofast -funroll-loops
-flto) on IceLake,CascadeLake, SkylakeW, Zen3 Server/Client,
r13-1268
y: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at computerquip dot com
Target Milestone: ---
I haven't quite figured out the pattern here so the title may not be great.
Some code may help explain better: https://godbolt.org/z/d8cqd1WqP
``
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113852
--- Comment #1 from Zachary L ---
Sorry, that should say "If *both* a1 or a2 are constexpr, the warning will
occur."
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113852
--- Comment #7 from Zachary L ---
(In reply to Richard Biener from comment #6)
> Well, given athat a1 * a2 is carried out in 'int' you are invoking undefined
> behavior if it overflows. GCC assumes that doesn't happen so it's correct
> to elide
ty: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at computerquip dot com
Target Milestone: ---
Example code: https://godbolt.org/z/cW9Pe1c85
```
#include
#include
int main()
{
std::ostringstream oss;
std::istringstream iss("test&
sion: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at hexadigm dot com
Target Milestone: ---
The following code correctly fails to compile based on my resear
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116167
--- Comment #2 from Larry Smith ---
Thanks for the quick reply. Probably a very rare scenario so a fix maybe low
priority, but for my purposes the situation is required in a particular SFINAE
context for an open source function traits library
(h
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at hexadigm dot com
Target Milestone: ---
Given the following code (run it at https://godbolt.org/z/cqv78Pdda), where
"Base::Whatever" is private (
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116639
--- Comment #1 from Larry Smith ---
FYI that the behavior table I posted above is a bit long but appeared correct
in the preview window when I submitted it (after expanding it using the
window's sizing grip). Wrapping now occurring instead in th
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116639
--- Comment #3 from Larry Smith ---
Thanks for the quick turnaround (and reference to the similar issue a few years
back). Appreciated. I see you also found (and cited) my Clang post. Credit for
your thoroughness :)
: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at hexadigm dot com
Target Milestone: ---
Hi there,
This is a bit lengthy (code to reproduce reasonably short though) but intended
to provide sufficient detail. I'm getting numerous erro
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114990
--- Comment #2 from Larry Smith ---
Thanks for the (very) fast turn-around (!). I'll look into the situation over
the coming days and reply further (so if you can keep the issue alive for now,
thanks). Just briefly though, can you (or anyone) co
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107563
--- Comment #12 from Levy Hsu ---
switch (d->vmode)
{
case E_V8QImode:
if (!TARGET_MMX_WITH_SSE)
return false;
mode = V4HImode;
gen_shr = gen_ashrv4hi3(should be gen_lshrv4hi3);
gen_shl = gen_ashlv4hi3;
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115146
--- Comment #5 from Levy Hsu ---
switch (d->vmode)
{
case E_V8QImode:
if (!TARGET_MMX_WITH_SSE)
return false;
mode = V4HImode;
gen_shr = gen_ashrv4hi3(should be gen_lshrv4hi3);
gen_shl = gen_ashlv4hi3;
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115146
--- Comment #7 from Levy Hsu ---
Created attachment 58236
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58236&action=edit
[PR]115146
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115146
--- Comment #11 from Levy Hsu ---
(In reply to Uroš Bizjak from comment #8)
> (In reply to Levy Hsu from comment #5)
> > case E_V16QImode:
> > mode = V8HImode;
> > gen_shr = gen_vlshrv8hi3;
> > gen_shl = gen_vashlv8hi3;
>
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at levyhsu dot com
Target Milestone: ---
Bisect down to r15-571-g1e0a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115256
--- Comment #3 from Levy Hsu ---
FYI we tried serval combinations, -funroll-loops didn't cause the issue, The
link-time optimization -flto may caused the issue, we can pass with the option
[-march=native -Ofast -funroll-loops].
But compiling wi
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at levyhsu dot com
Target Milestone: ---
This bug appears to be caused by a commit r14-4628-g63eaccd114393f
(63eaccd114393f4692976bb78b30148e6d77a89e
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111858
--- Comment #2 from Levy Hsu ---
Checked the parent commit and confirmed r14-4682-g323209cd73bf1d fixed the ICE.
Thanks~
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111858
Levy Hsu changed:
What|Removed |Added
Resolution|--- |FIXED
Status|WAITING
D
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at hexadigm dot com
Target Milestone: ---
Hi there,
See https://godbolt.org/z/MdToP8nP8 for a demo (self-explanatory and very
short). GCC version fail
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113129
--- Comment #2 from Larry Smith ---
@Andrew Thanks for the feedback. I don't work in Unix-like environments though
normally (including Linux) so CMake, make, and shell commands are something I
rarely work with (I specialize on Microsoft platform
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113129
--- Comment #3 from Larry Smith ---
UPDATE: This issue is presumably the same as this (didn't come across it when I
searched for any similar bugs prior to posting):
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109679
Agree with Nicolai Josutti
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109679
Larry Smith changed:
What|Removed |Added
CC||admin at hexadigm dot com
--- Comment #3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115889
--- Comment #7 from Levy Hsu ---
It appears that vect-partial-vector-usage=2 causes short int type V32HI falls
into vpermt2_sepcial_bf16_shuffle_ while the original one was intended
for bf16, will investigate.
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at levyhsu dot com
Target Milestone: ---
On x86 CascadeLake/IceLake/Sapphire Rapids/Zen4/Zen3, compile with:
-march=native -Ofast -funroll-loops -flto
or
-mtune=generic -O2 -march=x86-64
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116167
--- Comment #3 from Larry Smith ---
Just a follow-up (discovered since original post), if the function in question
is inherited then the issue disappears:
class BaseClass
{
public:
//
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115693
Levy Hsu changed:
What|Removed |Added
CC||admin at levyhsu dot com
--- Comment #7
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