--- Comment #8 from rguenth at gcc dot gnu dot org 2009-04-03 10:34 ---
Fixed.
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
Status|ASSIGNED
--- Comment #7 from rguenth at gcc dot gnu dot org 2009-04-03 10:26 ---
Subject: Bug 38207
Author: rguenth
Date: Fri Apr 3 10:24:28 2009
New Revision: 145494
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145494
Log:
2009-04-03 Richard Guenther
PR middle-end/13146
--- Comment #6 from rguenth at gcc dot gnu dot org 2008-12-10 16:26 ---
Subject: Bug 38207
Author: rguenth
Date: Wed Dec 10 16:25:27 2008
New Revision: 142649
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142649
Log:
2008-12-10 Richard Guenther <[EMAIL PROTECTED]>
PR
--- Comment #5 from rguenth at gcc dot gnu dot org 2008-11-22 17:47 ---
"The problem is a general defect in FRE that causes us to never CSE
a load with the default definition of the virtual SSA name."
after walking, that is.
I have a patch that also makes PR38212 to be visible on the t
--- Comment #4 from rguenth at gcc dot gnu dot org 2008-11-21 10:52 ---
Which means that we correctly optimize
int f(struct a *c)
{
int d;
c->c = 1;
d = c->a;
c->c = 1;
return c->a + d;
}
--
rguenth at gcc dot gnu dot org changed:
What|Removed
--- Comment #3 from rguenth at gcc dot gnu dot org 2008-11-21 10:51 ---
The oracle correctly figures that c_1(D)->D.1593.a and c_1(D)->D.1597.c do not
alias. The problem is a general defect in FRE that causes us to never CSE
a load with the default definition of the virtual SSA name.
--- Comment #2 from pinskia at gcc dot gnu dot org 2008-11-20 23:47 ---
This works correctly on the RTL level which means the aliasing oracle does not
say c->a and c->c cannot alias.
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
--
--- Comment #1 from pinskia at gcc dot gnu dot org 2008-11-20 23:31 ---
Note this was found in clang:
http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20081117/009546.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38207
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
Severity|normal |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38207
