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[Bug target/36713] [4.4 regression] r137252 breaks -O2 optimization on x86_64-unknown-linux-gnu
- From: "dfranke 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 Jul 2008 12:00:00 -0000
- Subject: [Bug target/36713] [4.4 regression] r137252 breaks -O2 optimization on x86_64-unknown-linux-gnu
- References: <bug-36713-13648@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #9 from dfranke at gcc dot gnu dot org 2008-07-03 11:59 -------
> Well, it's not really different - only thread_data now doesn't
> point to anything but to the same as derefaddrtmp.893 (I guess
> that points to { ESCAPED NONLOCAL }?).
Just ESCAPED, see below.
r137251
derefaddrtmp.893 = { ESCAPED }
derefaddrtmp.894 = { NONLOCAL }
this = { PARM_NOALIAS.895 }
PARM_NOALIAS.895 = { ANYTHING ESCAPED NONLOCAL }
D.3410_6 = same as thread_data
thread_data = { ANYTHING }
D.3411_7 = same as thread_data
D.3417_13 = { ANYTHING }
r137252
derefaddrtmp.893 = { ESCAPED }
derefaddrtmp.894 = { NONLOCAL }
this = { PARM_NOALIAS.895 }
PARM_NOALIAS.895 = { ESCAPED NONLOCAL }
D.3410_6 = same as derefaddrtmp.893
thread_data = same as derefaddrtmp.893
D.3411_7 = same as derefaddrtmp.893
> Well, if there is no difference in the optimized dumps then this
> doesn't explain it (but the points-to differences also look good)
None that I could spot by scrolling through 1000+ lines of differences.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36713