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From: "roland at digitalvampire dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/37261] New: Spurious (?) "integer overflow in expression" warnings Date: Wed, 27 Aug 2008 23:46:00 -0000 [thread overview] Message-ID: <bug-37261-16641@http.gcc.gnu.org/bugzilla/> (raw) With: $ gcc --version gcc (Debian 4.3.1-2) 4.3.1 running on x86-64, the code below produces seemingly spurious warnings about integer overflow: $ LANG=C gcc -c b.c b.c: In function 'foo': b.c:3: warning: integer overflow in expression b.c:5: warning: integer overflow in expression $ cat b.c unsigned foo(int x) { return ((x & 1) | 2) & 0x80000000; return ((x & 2) | 2) & 0x80000000; return ((x & 4) | 2) & 0x80000000; } -- Summary: Spurious (?) "integer overflow in expression" warnings Product: gcc Version: 4.3.1 Status: UNCONFIRMED Severity: minor Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: roland at digitalvampire dot org GCC build triplet: x86_64-linux-gnu GCC host triplet: x86_64-linux-gnu GCC target triplet: x86_64-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37261
next reply other threads:[~2008-08-27 23:46 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-08-27 23:46 roland at digitalvampire dot org [this message] 2008-08-28 9:17 ` [Bug c/37261] [4.3/4.4 Regression] " rguenth at gcc dot gnu dot org 2008-08-29 11:57 ` jakub at gcc dot gnu dot org 2008-08-29 12:24 ` jakub at gcc dot gnu dot org 2008-08-29 19:02 ` jakub at gcc dot gnu dot org 2008-08-29 19:11 ` jakub at gcc dot gnu dot org 2008-08-29 19:13 ` jakub at gcc dot gnu dot org
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