[Bug tree-optimization/58956] [4.7/4.8/4.9 Regression] wrong code at -O1 and above (affecting gcc 4.6 to trunk)

[mikpelinux at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58956

Mikael Pettersson <mikpelinux at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikpelinux at gmail dot com

--- Comment #2 from Mikael Pettersson <mikpelinux at gmail dot com> ---
gcc 4.5.4 and 4.4.7 are also broken, but 4.3.6 is Ok.  Started with r142396.

The effect of that revision is that

{
  struct S *i = c;
  *i = foo ();

is compiled as if it had been written

{
  struct S tmp = foo ();
  *c = tmp;

which is wrong since foo may (and in this case does) change c.