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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/19581] New: Missed store monition on the tree level (on PPC in general) Date: Sun, 23 Jan 2005 01:43:00 -0000 [thread overview] Message-ID: <20050123014322.19581.pinskia@gcc.gnu.org> (raw) This is like PR 19580 but a request to optimize it on the tree level instead of just on the RTL level. Mainly because we don't catch it for PPC (with 3.3.3 or with -fno-gcse). int r[6]; void f (int n) { while (-- n) { r [0] += r [5]; r [1] += r [0]; r [2] += r [1]; r [3] += r [2]; r [4] += r [3]; r [5] += r [4]; } } We should be able to pull out the load and stores for r[0] ... r[5]. If we do it on the tree level, we also just fix the problem for 4.0 also (but I think this might need more aliasing analysis or I could be wrong). -- Summary: Missed store monition on the tree level (on PPC in general) Product: gcc Version: 4.0.0 Status: UNCONFIRMED Keywords: missed-optimization, alias, TREE Severity: enhancement Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19581
next reply other threads:[~2005-01-23 1:43 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-01-23 1:43 pinskia at gcc dot gnu dot org [this message] 2005-01-23 1:45 ` [Bug tree-optimization/19581] " pinskia at gcc dot gnu dot org 2005-01-23 1:47 ` dberlin at gcc dot gnu dot org 2005-01-23 19:27 ` steven at gcc dot gnu dot org 2005-01-23 19:30 ` [Bug tree-optimization/19581] Missed store monition on the tree level steven at gcc dot gnu dot org 2005-01-23 19:44 ` rakdver at gcc dot gnu dot org 2005-01-23 19:53 ` steven at gcc dot gnu dot org 2005-01-23 20:00 ` pinskia at gcc dot gnu dot org 2005-01-23 20:01 ` rakdver at gcc dot gnu dot org 2005-07-26 13:21 ` [Bug tree-optimization/19581] Missed store motion " dberlin at gcc dot gnu dot org 2005-07-26 13:59 ` rguenth at gcc dot gnu dot org
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