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[Bug tree-optimization/33344] if(!z) {a.b = x->b + 1; z = &a; } else if (!x) { a.b = z->b+1; x = &a; } use z->b and x->b; is not optimized
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Apr 2009 11:40:50 -0000
- Subject: [Bug tree-optimization/33344] if(!z) {a.b = x->b + 1; z = &a; } else if (!x) { a.b = z->b+1; x = &a; } use z->b and x->b; is not optimized
- References: <bug-33344-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from rguenth at gcc dot gnu dot org 2009-04-03 11:40 -------
Fixed with the alias-improvements branch merge.
g (struct f * b, struct f * c)
{
int prephitmp.20;
int prephitmp.19;
<bb 2>:
if (b == 0B)
goto <bb 3>;
else
goto <bb 4>;
<bb 3>:
prephitmp.19 = c->a;
prephitmp.20 = prephitmp.19 + 1;
goto <bb 7>;
<bb 4>:
if (c == 0B)
goto <bb 6>;
else
goto <bb 5>;
<bb 5>:
prephitmp.19 = c->a;
prephitmp.20 = b->a;
goto <bb 7>;
<bb 6>:
prephitmp.20 = b->a;
prephitmp.19 = prephitmp.20 + 1;
<bb 7>:
return prephitmp.20 + prephitmp.19;
}
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33344