This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/66646] small loop turned into memmove because of tree ldist
- From: "amker at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 02 Aug 2016 08:06:18 +0000
- Subject: [Bug tree-optimization/66646] small loop turned into memmove because of tree ldist
- Auto-submitted: auto-generated
- References: <bug-66646-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66646
--- Comment #5 from amker at gcc dot gnu.org ---
After commit reordering passes:
commit 410372fef14173261ce8e547db98eafb3174921f
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu May 19 07:39:52 2016 +0000
2016-05-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/70729
* passes.def: Move LIM pass before PRE. Remove no longer
required copyprop and move first DCE out of the loop pipeline.
* gcc.dg/autopar/outer-6.c: Adjust to avoid redundant store.
* gcc.dg/graphite/scop-18.c: Likewise.
* gcc.dg/pr41783.c: Disable LIM.
* gcc.dg/tree-ssa/loadpre10.c: Likewise.
* gcc.dg/tree-ssa/loadpre23.c: Likewise.
* gcc.dg/tree-ssa/loadpre24.c: Likewise.
* gcc.dg/tree-ssa/loadpre25.c: Likewise.
* gcc.dg/tree-ssa/loadpre4.c: Likewise.
* gcc.dg/tree-ssa/loadpre8.c: Likewise.
* gcc.dg/tree-ssa/ssa-pre-16.c: Likewise.
* gcc.dg/tree-ssa/ssa-pre-18.c: Likewise.
* gcc.dg/tree-ssa/ssa-pre-20.c: Likewise.
* gcc.dg/tree-ssa/ssa-pre-3.c: Likewise.
* gfortran.dg/pr42108.f90: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@236440
138bc75d-0d04-0410-961f-82ee72b054a4
GCC no longer recognizes &a[j]/&a[j-1]. This is because of changed IR. I will
report another bug for this while keeping this one for track of memcopy
improvement (or ldist).