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[Bug tree-optimization/37542] New: PRE doesn't simplify during phi-translation
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Sep 2008 15:22:18 -0000
- Subject: [Bug tree-optimization/37542] New: PRE doesn't simplify during phi-translation
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
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