------- Comment #2 from pinskia at gcc dot gnu dot org 2009-12-31 02:23 -------
Well with: int32_t actuallyRead = read(&v, SIZE_OF_BYTE);
And inlining turned on all the way, this:
if (toRead < 1)
...
memcpy(data, _totPtr, toRead);
Becomes just:
*_totPtr = *data;
which in turn becomes:
* _totPtr = v;
So the issue is more complex and GCC needs uninitialized warning for memcpy and
arrays (and array SSA).
Most compilers don't implement array SSA really. I Know of only two that do,
Jikes VM (IBM's Java JIT compiler) and another one which I forget about but it
is also a JIT IIRC.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42561
