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* [Bug c++/33068] volatile struct bit fields not treated as volatile [not found] <bug-33068-4@http.gcc.gnu.org/bugzilla/> @ 2013-04-09 17:05 ` paolo.carlini at oracle dot com 2024-04-04 1:44 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: paolo.carlini at oracle dot com @ 2013-04-09 17:05 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33068 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC|gcc-bugs at gcc dot gnu.org |schwab@linux-m68k.org --- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-04-09 17:05:55 UTC --- Maybe Andreas is willing to revisit this issue. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/33068] volatile struct bit fields not treated as volatile [not found] <bug-33068-4@http.gcc.gnu.org/bugzilla/> 2013-04-09 17:05 ` [Bug c++/33068] volatile struct bit fields not treated as volatile paolo.carlini at oracle dot com @ 2024-04-04 1:44 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-04-04 1:44 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33068 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to work| |13.1.0 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Looks working GCC 13: ProcedureBitStructVolatile(): .LFB12: .cfi_startproc move.w BitStruct,%d0 rts ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/33068] New: volatile struct bit fields not treated as volatile @ 2007-08-14 17:20 Steve at Zook dot com 2007-08-14 17:28 ` [Bug c++/33068] " Steve at Zook dot com 0 siblings, 1 reply; 3+ messages in thread From: Steve at Zook dot com @ 2007-08-14 17:20 UTC (permalink / raw) To: gcc-bugs When individual bit field members of a struct/class are declared as volatile, the generated code may not treat them as volatile (code varies with -O and -m<processor> choices). Non-bit field volatile members and bit field members of volatile structs are always treated as volatile. The problem can be worked around by declaring the entire structure volatile. m68k-elf-g++ and m68k-elf-gcc both generate the bad code when compiling C++, however, m68k-elf-gcc generates good code when compiling the same test code as C. I will attach a test.c file which can be compiled as C or C++. -- Summary: volatile struct bit fields not treated as volatile Product: gcc Version: 4.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: Steve at Zook dot com GCC host triplet: i686-pc-cygwin GCC target triplet: m68k-elf http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33068 ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/33068] volatile struct bit fields not treated as volatile 2007-08-14 17:20 [Bug c++/33068] New: " Steve at Zook dot com @ 2007-08-14 17:28 ` Steve at Zook dot com 0 siblings, 0 replies; 3+ messages in thread From: Steve at Zook dot com @ 2007-08-14 17:28 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from Steve at Zook dot com 2007-08-14 17:28 ------- Created an attachment (id=14059) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14059&action=view) Test C or C++ code fragment For bad code compile: m68k-elf-gcc -c -save-temps -x c++ test.c or: m68k-elf-g++ -c -save-temps test.c note code for ProcedureBitStructVolatile() and ProcedureBitStructVolatileConst() for good code compile: m68k-elf-gcc -c -save-temps test.c or: m68k-elf-g++ -c -save-temps -x c test.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33068 ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-04-04 1:44 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-33068-4@http.gcc.gnu.org/bugzilla/> 2013-04-09 17:05 ` [Bug c++/33068] volatile struct bit fields not treated as volatile paolo.carlini at oracle dot com 2024-04-04 1:44 ` pinskia at gcc dot gnu.org 2007-08-14 17:20 [Bug c++/33068] New: " Steve at Zook dot com 2007-08-14 17:28 ` [Bug c++/33068] " Steve at Zook dot com
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