--- Comment #5 from mattias at virtutech dot se 2009-03-11 12:42 ---
(In reply to comment #4)
>http://209.85.173.132/search?q=cache:e7XCjhLwHacJ:luabinaries.luaforge.net/manual.html+http://luabinaries.luaforge.net/manual.html%23LuaBinariesCompatible&hl=en&ct=clnk&cd
--- Comment #7 from mattias at virtutech dot se 2009-03-20 17:16 ---
The proposed patch works for plain C code, but also affects C++. Since
libstdc++ contains code that returns aggregates or calls code that does,
-mms-aggregate-return will make the generated code incompatible with the C
--- Comment #9 from mattias at virtutech dot se 2009-03-21 16:45 ---
Created an attachment (id=17508)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17508&action=view)
Functions in libstdc++ returning aggregates > 8 bytes
These are the functions in libstdc++ that c
--- Comment #10 from mattias at virtutech dot se 2009-03-21 21:49 ---
Note that C++ objects need not be larger than 8 bytes to qualify for returning
on the stack (and thus subject to this cleanup problem). Any class with a copy
constructor, for example, seems to be affected.
Try
NULL
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mattias at virtutech dot se
CC: gcc-bugs at
--- Additional Comments From mattias at virtutech dot se 2005-07-14 13:13
---
I forgot to state the version (4.0.0), but I have not seen any gcc version
optimising this case.
--
What|Removed |Added
--- Additional Comments From mattias at virtutech dot se 2005-07-15 09:12
---
It could be made an option so the user can tell GCC whether to make
standard-conforming code go as fast as possible or if arithmetic on null
pointers (as a gcc extension, say) is needed. -fnull-pointer-arith
--- Additional Comments From mattias at virtutech dot se 2005-07-15 15:29
---
(In reply to comment #18)
> The "side" notes were written by people who know what they
> intend. Therefore their inputs are completely relevant here.
Even if you could show that these opt
--- Comment #3 from mattias at virtutech dot se 2008-07-18 09:43 ---
Thank you. Should the option be enabled by default on i686-pc-mingw32? Perhaps
not, but it does make good on a previously broken ABI promise.
The test case in that patch only covers the callee, not the caller. The
--- Comment #17 from mattias at virtutech dot se 2006-03-02 09:22 ---
We have resorted to case-by-case workarounds, usually a cast which would have
been an identity operation had the condition been true. That is,
if (sizeof x == 8)
return x << 32 | x;
would have its
: mattias at virtutech dot se
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26632
--- Comment #3 from mattias at virtutech dot se 2006-03-10 15:30 ---
Yes, I realise it's the implicit integral conversion that causes the warning,
but since the result is not used no matter what it seems wrong to warn for it -
it cannot reasonably a sign of an error in the code.
I
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mattias at virtutech dot se
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-
ssigned at gcc dot gnu dot org
ReportedBy: mattias at virtutech dot se
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21191
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