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From: "zephyrtronium at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/47708] New: incorrect code on -O2 without -fno-tree-pre Date: Sat, 12 Feb 2011 06:35:00 -0000 [thread overview] Message-ID: <bug-47708-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47708 Summary: incorrect code on -O2 without -fno-tree-pre Product: gcc Version: 4.5.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned@gcc.gnu.org ReportedBy: zephyrtronium@gmail.com Created attachment 23310 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23310 minimal case gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.5.2/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-4.5.2/configure --enable-lto Thread model: posix gcc version 4.5.2 (GCC) Compiling the following minimal case on -O2 or -O3 and running results in incorrect output; with -O0, -O1, or -Os, it is correct. -O2 -fno-tree-pre results in correct output, but -O1 -ftree-pre is also correct. GCC 4.4.3 appears to work.
next reply other threads:[~2011-02-12 6:27 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-02-12 6:35 zephyrtronium at gmail dot com [this message] 2011-02-12 7:27 ` [Bug tree-optimization/47708] " pinskia at gmail dot com 2011-02-12 7:29 ` pinskia at gcc dot gnu.org
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