[Bug tree-optimization/32901] [4.1/4.2/4.3 regression] bitfield constants with multiple bitfields take up space in .data

[aldyh at gcc dot gnu dot org]

------- Comment #9 from aldyh at gcc dot gnu dot org  2007-12-04 23:43 -------
TER would never see the consecutive initializations because the code I pointed
out in gimplify_init_constructor() keeps the gimplifier from splitting up the
constructor into consecutive MODIFY_EXPRs.

After gimplification we end up with:

setup_foo ()
{
  static const struct foo init = {.a1=1, .a2=5};
  thefoo = init;
}

So there's nothing to merge back.

What I'm suggesting *is* splitting this up, so subsequent passes can take a
stab at it.  In this case, combine cleans it up.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32901