https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84013
--- Comment #5 from Katsunori Kumatani ---
Hi, any news of this for GCC 9? I'm guessing it requires a bit more changes,
hopefully not forgotten though. Currently I'm using a custom patched GCC 8 for
it (and to test plugin behavior with it) but it
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84013
--- Comment #4 from Katsunori Kumatani ---
Thanks, it's quite useful in some "meta asm" cases (in conjunction with
plugins, asms can be useful since you can't add builtins). Or when doing custom
calls in asms (or syscalls, etc) and you know what
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84013
--- Comment #2 from Katsunori Kumatani ---
I'm not familiar with tree-ssa-structalias, but it appears to me that the "fix"
is quite simple? Or am I missing something? Here's the snippet from it, updated
with my attempt:
if (restrict_var)
: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: katsunori.kumatani at gmail dot com
Target Milestone: ---
Using a __restrict parameter in an asm results in the wrong clique assigned to
the MEM_REF if the same pointer is used without an asm (where it has the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
Katsunori Kumatani changed:
What|Removed |Added
CC||katsunori.kumatani at gmail
dot co
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79748
--- Comment #3 from Katsunori Kumatani ---
Well, I remembered I omitted another simple situation in which it would help.
But because this attribute does not exist right now, I'll have to show you a
"what-it-could-be" output code if it did exist.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79748
--- Comment #2 from Katsunori Kumatani ---
I tried -O3 -fipa-ra on the following example code but it seems it doesn't do
what I suggested: (I used inline asm to force it to use a callee-saved
register, no other reason... just to demonstrate)
#
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: katsunori.kumatani at gmail dot com
Target Milestone: ---
This is not a bug but a feature request/enhancement (hopefully simple?).
On x86(-64), upcoming GCC has added the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #16 from Katsunori Kumatani
---
I see! It was more a side note than anything when I inspected GCC 7's output, I
am not even sure if it affects x87 only (not sure if I should have opened
another bug for it, but I guess it doesn't matt
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #13 from Katsunori Kumatani
---
Ah sorry! I skimmed through that as I thought it was talking about the patch's
fld (that it improved). Thanks, it's good to know the cause at least :) I hope
it makes it easier to improve if needed to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #11 from Katsunori Kumatani
---
Sorry, one small thing I need to mention in case it's not obvious at first
glance.
The GCC 6 vs GCC 5 portion of code I showed has *exactly* the same behavior.
It's not that it "uses the value later t
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #10 from Katsunori Kumatani
---
(In reply to Uroš Bizjak from comment #7)
>
> This patch allows conversion from (reg->reg) move to (const->reg) when
> appropriate constant can be determined from REG_EQUIV/REG_EQUAL note. It
> also h
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #4 from Katsunori Kumatani ---
I forgot to mention that in the particular above example, it is obvious the
"fstp" is useless.
If you remove the "fld st(0)" and then the 'p' from the fstp, you end up with
"fst st(0)" which is basicall
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #3 from Katsunori Kumatani ---
Hi, sorry I forgot to mention, I used Godbolt's Compiler Explorer to test it on
GCC 5 and 7 as I only have version 6 deployed on this machine.
On my end, it probably used march 'native' by default (?) b
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: katsunori.kumatani at gmail dot com
Target Milestone: ---
First of all sorry if the "Component" is set wrong, I didn't know what to pick
(in respec
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79552
--- Comment #3 from Katsunori Kumatani ---
(In reply to Uroš Bizjak from comment #1)
> (In reply to Katsunori Kumatani from comment #0)
>
> > Things to note:
> >
> > This happens on GCC 6 and up to 7 only, GCC 5.4 generates correct output.
> >
: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: katsunori.kumatani at gmail dot com
Target Milestone: ---
This is a regression bug leading to wrong code generation with __restrict__ in
C++ and
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