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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/37542] New: PRE doesn't simplify during phi-translation
Date: Tue, 16 Sep 2008 15:23:00 -0000 [thread overview]
Message-ID: <bug-37542-10053@http.gcc.gnu.org/bugzilla/> (raw)
Related to the XFAIL of gcc.dg/tree-ssa/ssa-pre-15.c (PR37145). The general
issue is that PRE doesn't simplify expressions during phi-translation
which can be seen for example for
int foo (int i, int b)
{
int j = 1;
if (b)
j = i;
return j - i;
}
where j - i is partially redundant.
--
Summary: PRE doesn't simplify during phi-translation
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37542
next reply other threads:[~2008-09-16 15:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-16 15:23 rguenth at gcc dot gnu dot org [this message]
2008-09-16 15:23 ` [Bug tree-optimization/37542] " rguenth at gcc dot gnu dot org
2008-09-16 15:35 ` [Bug tree-optimization/37542] [4.4 Regression] " rguenth at gcc dot gnu dot org
2008-09-22 12:21 ` rguenth at gcc dot gnu dot org
2008-10-22 3:47 ` mmitchel at gcc dot gnu dot org
2008-11-01 17:12 ` rguenth at gcc dot gnu dot org
2008-11-01 17:13 ` rguenth at gcc dot gnu dot org
2008-11-02 15:28 ` rguenth at gcc dot gnu dot org
2008-11-02 15:29 ` rguenth at gcc dot gnu dot org
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