[Bug c++/33068] New: volatile struct bit fields not treated as volatile

["Steve at Zook dot com" <gcc-bugzilla at gcc dot gnu dot org>]

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