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From: "zimmerma+gcc at loria dot fr" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/36296] New: wrong warning about potential uninitialized variable Date: Thu, 22 May 2008 07:28:00 -0000 [thread overview] Message-ID: <bug-36296-16207@http.gcc.gnu.org/bugzilla/> (raw) When compiling mpfr-2.3.1 with gcc-4.3, one gets the following warning (among others): {{{ lngamma.c: In function 'mpfr_lngamma_aux': lngamma.c:160: warning: 'B' may be used uninitialized in this function }}} However, looking at the code shows that this variable cannot be used uninitialized: * a variable Bm is initialized to zero * if Bm=0, B is initialized using an auxiliary function, and Bm is set to 2 (this code is in a do { ... } while loop, thus is always executed) -- Summary: wrong warning about potential uninitialized variable Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: zimmerma+gcc at loria dot fr GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36296
next reply other threads:[~2008-05-22 7:28 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-05-22 7:28 zimmerma+gcc at loria dot fr [this message] 2008-05-22 8:22 ` [Bug middle-end/36296] " pinskia at gcc dot gnu dot org 2008-05-22 8:34 ` vincent at vinc17 dot org 2008-05-22 10:21 ` rguenth at gcc dot gnu dot org 2008-05-22 11:02 ` vincent at vinc17 dot org 2008-05-22 11:23 ` vincent at vinc17 dot org 2008-05-28 7:31 ` pinskia at gcc dot gnu dot org 2008-05-28 8:19 ` vincent at vinc17 dot org 2008-08-18 17:25 ` manu at gcc dot gnu dot org 2008-08-18 22:59 ` vincent at vinc17 dot org 2008-08-18 23:39 ` [Bug middle-end/36296] bogus uninitialized warning (loop representation) manu at gcc dot gnu dot org 2008-08-19 1:33 ` vincent at vinc17 dot org 2008-08-19 2:34 ` [Bug middle-end/36296] bogus uninitialized warning (loop representation, VRP missed-optimization) manu at gcc dot gnu dot org 2008-12-25 3:03 ` pinskia at gcc dot gnu dot org 2009-02-02 23:44 ` av1474 at comtv dot ru 2009-02-03 0:28 ` manu at gcc dot gnu dot org
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