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* [Bug c/46015] New: -Wunused-but-set-variable false positive
@ 2010-10-14 12:01 foldy at rmki dot kfki.hu
2010-10-14 13:45 ` [Bug c/46015] [4.6 Regression] " rguenth at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: foldy at rmki dot kfki.hu @ 2010-10-14 12:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46015
Summary: -Wunused-but-set-variable false positive
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: foldy@rmki.kfki.hu
/* test.c */
int f(int i)
{
static void* labs[2] =
{ &&lab1,
&&lab2
};
goto *(labs[i&1]);
lab1: return 1;
lab2: return 2;
return 0;
}
/* test.c end */
GCC 4.6.0 20101014 -Wall prints the followiung warning:
test.c: In function 'f':
test.c:5:16: warning: variable 'labs' set but not used
[-Wunused-but-set-variable]
(GCC 4.5.1 is OK.)
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable false positive 2010-10-14 12:01 [Bug c/46015] New: -Wunused-but-set-variable false positive foldy at rmki dot kfki.hu @ 2010-10-14 13:45 ` rguenth at gcc dot gnu.org 2010-10-14 19:30 ` [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable warns for arrays used in gotos jakub at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2010-10-14 13:45 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46015 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic Target Milestone|--- |4.6.0 Summary|-Wunused-but-set-variable |[4.6 Regression] |false positive |-Wunused-but-set-variable | |false positive ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable warns for arrays used in gotos 2010-10-14 12:01 [Bug c/46015] New: -Wunused-but-set-variable false positive foldy at rmki dot kfki.hu 2010-10-14 13:45 ` [Bug c/46015] [4.6 Regression] " rguenth at gcc dot gnu.org @ 2010-10-14 19:30 ` jakub at gcc dot gnu.org 2010-10-18 15:55 ` jakub at gcc dot gnu.org 2010-10-18 16:16 ` jakub at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: jakub at gcc dot gnu.org @ 2010-10-14 19:30 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46015 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2010.10.14 19:30:17 CC| |jakub at gcc dot gnu.org Ever Confirmed|0 |1 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable warns for arrays used in gotos 2010-10-14 12:01 [Bug c/46015] New: -Wunused-but-set-variable false positive foldy at rmki dot kfki.hu 2010-10-14 13:45 ` [Bug c/46015] [4.6 Regression] " rguenth at gcc dot gnu.org 2010-10-14 19:30 ` [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable warns for arrays used in gotos jakub at gcc dot gnu.org @ 2010-10-18 15:55 ` jakub at gcc dot gnu.org 2010-10-18 16:16 ` jakub at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: jakub at gcc dot gnu.org @ 2010-10-18 15:55 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46015 --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-10-18 15:55:31 UTC --- Author: jakub Date: Mon Oct 18 15:55:25 2010 New Revision: 165643 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165643 Log: PR c/46015 * c-parser.c (c_parser_statement_after_labels): Call mark_exp_read on computed goto argument. * semantics.c (finish_goto_stmt): Call mark_rvalue_use on computed goto destination. * c-c++-common/Wunused-var-13.c: New test. Added: trunk/gcc/testsuite/c-c++-common/Wunused-var-13.c Modified: trunk/gcc/ChangeLog trunk/gcc/c-parser.c trunk/gcc/cp/ChangeLog trunk/gcc/cp/semantics.c trunk/gcc/testsuite/ChangeLog ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable warns for arrays used in gotos 2010-10-14 12:01 [Bug c/46015] New: -Wunused-but-set-variable false positive foldy at rmki dot kfki.hu ` (2 preceding siblings ...) 2010-10-18 15:55 ` jakub at gcc dot gnu.org @ 2010-10-18 16:16 ` jakub at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: jakub at gcc dot gnu.org @ 2010-10-18 16:16 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46015 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-10-18 16:15:55 UTC --- Fixed. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-10-18 16:16 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-10-14 12:01 [Bug c/46015] New: -Wunused-but-set-variable false positive foldy at rmki dot kfki.hu 2010-10-14 13:45 ` [Bug c/46015] [4.6 Regression] " rguenth at gcc dot gnu.org 2010-10-14 19:30 ` [Bug c/46015] [4.6 Regression] -Wunused-but-set-variable warns for arrays used in gotos jakub at gcc dot gnu.org 2010-10-18 15:55 ` jakub at gcc dot gnu.org 2010-10-18 16:16 ` jakub at gcc dot gnu.org
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