* [Bug c++/80456] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
@ 2020-09-23 3:43 ` lebed.dmitry at gmail dot com
2021-04-15 13:17 ` [Bug c++/80456] [8/9/10/11 Regression] " ppalka at gcc dot gnu.org
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From: lebed.dmitry at gmail dot com @ 2020-09-23 3:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
Dmitry Lebed <lebed.dmitry at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lebed.dmitry at gmail dot com
--- Comment #7 from Dmitry Lebed <lebed.dmitry at gmail dot com> ---
Just encountered the same issue independently
https://stackoverflow.com/questions/64019728/are-there-any-caveats-in-c-with-constexpr-static-function-usage-in-volatile
It's sad to see that it's already 3 years without fix.
It's still valid for GCC trunk (according to godbolt) and at 10.2 (according to
my local tests).
Any hope in fixing this?
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [8/9/10/11 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
2020-09-23 3:43 ` [Bug c++/80456] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression lebed.dmitry at gmail dot com
@ 2021-04-15 13:17 ` ppalka at gcc dot gnu.org
2021-04-15 19:05 ` jason at gcc dot gnu.org
` (6 subsequent siblings)
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From: ppalka at gcc dot gnu.org @ 2021-04-15 13:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.8.1
Summary|calling constexpr member |[8/9/10/11 Regression]
|function from |calling constexpr member
|volatile-qualified member |function from
|function: error: ‘this’ is |volatile-qualified member
|not a constant expression |function: error: ‘this’ is
| |not a constant expression
Known to fail| |10.3.0, 11.0, 8.4.0, 9.3.0
CC| |ppalka at gcc dot gnu.org
Target Milestone|--- |8.5
--- Comment #8 from Patrick Palka <ppalka at gcc dot gnu.org> ---
We apparently started rejecting the testcase starting with GCC 4.9 (r0-122547
or perhaps r0-122549); GCC 4.8 accepts. So I suppose we should consider this
PR a regression.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [8/9/10/11 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
2020-09-23 3:43 ` [Bug c++/80456] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression lebed.dmitry at gmail dot com
2021-04-15 13:17 ` [Bug c++/80456] [8/9/10/11 Regression] " ppalka at gcc dot gnu.org
@ 2021-04-15 19:05 ` jason at gcc dot gnu.org
2021-04-15 20:32 ` cvs-commit at gcc dot gnu.org
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From: jason at gcc dot gnu.org @ 2021-04-15 19:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Known to work| |7.5.0
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [8/9/10/11 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2021-04-15 19:05 ` jason at gcc dot gnu.org
@ 2021-04-15 20:32 ` cvs-commit at gcc dot gnu.org
2021-04-15 20:34 ` [Bug c++/80456] [8/9/10 " jason at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2021-04-15 20:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:3682052e4ccf0a29d1f61df1c8e31f8190eafafe
commit r11-8203-g3682052e4ccf0a29d1f61df1c8e31f8190eafafe
Author: Jason Merrill <jason@redhat.com>
Date: Thu Apr 15 15:13:18 2021 -0400
c++: constexpr and volatile member function [PR80456]
When calling a static member function we still need to evaluate an explicit
object argument. But we don't want to force a load of the entire object
if the argument is volatile, so we take its address. If as a result it no
longer has any side-effects, we don't need to evaluate it after all.
gcc/cp/ChangeLog:
PR c++/80456
* call.c (build_new_method_call_1): Check again for side-effects
with a volatile object.
gcc/testsuite/ChangeLog:
PR c++/80456
* g++.dg/cpp0x/constexpr-volatile3.C: New test.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [8/9/10 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2021-04-15 20:32 ` cvs-commit at gcc dot gnu.org
@ 2021-04-15 20:34 ` jason at gcc dot gnu.org
2021-05-14 9:48 ` [Bug c++/80456] [9/10 " jakub at gcc dot gnu.org
` (3 subsequent siblings)
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From: jason at gcc dot gnu.org @ 2021-04-15 20:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |11.0
Summary|[8/9/10/11 Regression] |[8/9/10 Regression] calling
|calling constexpr member |constexpr member function
|function from |from volatile-qualified
|volatile-qualified member |member function: error:
|function: error: ‘this’ is |‘this’ is not a constant
|not a constant expression |expression
Known to fail|11.0 |
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 11 so far.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [9/10 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2021-04-15 20:34 ` [Bug c++/80456] [8/9/10 " jason at gcc dot gnu.org
@ 2021-05-14 9:48 ` jakub at gcc dot gnu.org
2021-05-20 21:36 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
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From: jakub at gcc dot gnu.org @ 2021-05-14 9:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.5 |9.4
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 8 branch is being closed.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [9/10 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2021-05-14 9:48 ` [Bug c++/80456] [9/10 " jakub at gcc dot gnu.org
@ 2021-05-20 21:36 ` cvs-commit at gcc dot gnu.org
2021-05-21 14:50 ` cvs-commit at gcc dot gnu.org
2021-05-21 14:51 ` jason at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-20 21:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:
https://gcc.gnu.org/g:75c5c4ab2662a92f0e3811cb17e27cc61814b400
commit r10-9856-g75c5c4ab2662a92f0e3811cb17e27cc61814b400
Author: Jason Merrill <jason@redhat.com>
Date: Thu Apr 15 15:13:18 2021 -0400
c++: constexpr and volatile member function [PR80456]
When calling a static member function we still need to evaluate an explicit
object argument. But we don't want to force a load of the entire object
if the argument is volatile, so we take its address. If as a result it no
longer has any side-effects, we don't need to evaluate it after all.
gcc/cp/ChangeLog:
PR c++/80456
* call.c (build_new_method_call_1): Check again for side-effects
with a volatile object.
gcc/testsuite/ChangeLog:
PR c++/80456
* g++.dg/cpp0x/constexpr-volatile3.C: New test.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [9/10 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2021-05-20 21:36 ` cvs-commit at gcc dot gnu.org
@ 2021-05-21 14:50 ` cvs-commit at gcc dot gnu.org
2021-05-21 14:51 ` jason at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-21 14:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:
https://gcc.gnu.org/g:0c6b4e661d875410535e17a9d82e6a0d09f28c65
commit r9-9547-g0c6b4e661d875410535e17a9d82e6a0d09f28c65
Author: Jason Merrill <jason@redhat.com>
Date: Thu Apr 15 15:13:18 2021 -0400
c++: constexpr and volatile member function [PR80456]
When calling a static member function we still need to evaluate an explicit
object argument. But we don't want to force a load of the entire object
if the argument is volatile, so we take its address. If as a result it no
longer has any side-effects, we don't need to evaluate it after all.
gcc/cp/ChangeLog:
PR c++/80456
* call.c (build_new_method_call_1): Check again for side-effects
with a volatile object.
gcc/testsuite/ChangeLog:
PR c++/80456
* g++.dg/cpp0x/constexpr-volatile3.C: New test.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c++/80456] [9/10 Regression] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression
[not found] <bug-80456-4@http.gcc.gnu.org/bugzilla/>
` (7 preceding siblings ...)
2021-05-21 14:50 ` cvs-commit at gcc dot gnu.org
@ 2021-05-21 14:51 ` jason at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: jason at gcc dot gnu.org @ 2021-05-21 14:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 9.4/10.4/11.
^ permalink raw reply [flat|nested] 9+ messages in thread