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From: "pluto at agmk dot net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/32207] New: inconsistent/missed warnings about address of 'x'. Date: Mon, 04 Jun 2007 16:59:00 -0000 [thread overview] Message-ID: <bug-32207-7667@http.gcc.gnu.org/bugzilla/> (raw) the following testcase express one condition in three different ways. in fact, gcc produces only two different warnings. extern void z(); void f() { if ( z ) z(); } void g() { if ( z != 0 ) z(); } void h() { if ( z != (void*)0 ) z(); } t.c: In function 'f': t.c:2: warning: the address of 'z' will always evaluate as 'true' t.c: In function 'g': t.c:3: warning: the address of 'z' will never be NULL -- Summary: inconsistent/missed warnings about address of 'x'. Product: gcc Version: 4.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pluto at agmk dot net GCC target triplet: x86_64-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32207
next reply other threads:[~2007-06-04 16:59 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-06-04 16:59 pluto at agmk dot net [this message] 2007-06-06 21:51 ` [Bug c/32207] missing " pinskia at gcc dot gnu dot org 2008-02-05 19:32 ` pluto at agmk dot net 2010-04-27 2:40 ` pzhao at gcc dot gnu dot org 2010-04-27 2:42 ` pzhao at gcc dot gnu dot org
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