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[Bug target/36713] New: [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 09:09:09 -0000
- Subject: [Bug target/36713] New: [4.4 regression] r137252 breaks -O2 optimization on x86_64-unknown-linux-gnu
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
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r137252 | rguenth | 2008-06-29 17:44:00 +0200 (Sun, 29 Jun 2008) | 27 lines
2008-06-29 Richard Guenther <rguenther@suse.de>
For now, all I can tell is: my Fortran-based project gives acceptable results
with r137251 (FCFLAGS="-O2"), but r137252 produces strange output that can,
numerically, not be justified. For FCFLAGS="-O1", both revisions seem to work.
Can't provide a testcase for now as I'm not sure where I should start looking.
Pointers welcome :)
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Summary: [4.4 regression] r137252 breaks -O2 optimization on
x86_64-unknown-linux-gnu
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dfranke at gcc dot gnu dot org
GCC host triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36713