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* [Bug c/48414] New: Missing "uninitialized" warning in simple switch
@ 2011-04-02 15:05 sarbalap+gccbugzilla at gmail dot com
2012-10-24 21:55 ` [Bug c/48414] " ajv-198-093-0407 at vsta dot org
2012-10-24 22:05 ` manu at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: sarbalap+gccbugzilla at gmail dot com @ 2011-04-02 15:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48414
Summary: Missing "uninitialized" warning in simple switch
Product: gcc
Version: 4.5.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: sarbalap+gccbugzilla@gmail.com
Compiling the following code does not produce any warning, even if the "ret"
variable would be used uninitialized in most cases:
#include <stdio.h>
int main(void)
{
int ret;
printf("Input something: ");
fflush(stdout);
int c = getchar();
switch (c) {
case 'a':
ret = 0;
break;
default:
/* ret still uninitialized. */
break;
}
return ret;
}
Compiled with "gcc -Wall -o uninitialized uninitialized.c" under GCC 4.5.2.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c/48414] Missing "uninitialized" warning in simple switch
2011-04-02 15:05 [Bug c/48414] New: Missing "uninitialized" warning in simple switch sarbalap+gccbugzilla at gmail dot com
@ 2012-10-24 21:55 ` ajv-198-093-0407 at vsta dot org
2012-10-24 22:05 ` manu at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: ajv-198-093-0407 at vsta dot org @ 2012-10-24 21:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48414
Andy Valencia <ajv-198-093-0407 at vsta dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ajv-198-093-0407 at vsta
| |dot org
--- Comment #1 from Andy Valencia <ajv-198-093-0407 at vsta dot org> 2012-10-24 21:54:59 UTC ---
As of:
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
the following code also does not get warned about the
possibly uninitialized variable. I'm quite sure that
gcc *used* to pick this up.
int
main(int argc, char **argv)
{
int c;
if (argc > 1) {
c = 1;
}
return(c);
}
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c/48414] Missing "uninitialized" warning in simple switch
2011-04-02 15:05 [Bug c/48414] New: Missing "uninitialized" warning in simple switch sarbalap+gccbugzilla at gmail dot com
2012-10-24 21:55 ` [Bug c/48414] " ajv-198-093-0407 at vsta dot org
@ 2012-10-24 22:05 ` manu at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: manu at gcc dot gnu.org @ 2012-10-24 22:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48414
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution| |DUPLICATE
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-10-24 22:05:41 UTC ---
This is constant propagation. Old issue. No fix in sight.
*** This bug has been marked as a duplicate of bug 18501 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-10-24 22:05 UTC | newest]
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2011-04-02 15:05 [Bug c/48414] New: Missing "uninitialized" warning in simple switch sarbalap+gccbugzilla at gmail dot com
2012-10-24 21:55 ` [Bug c/48414] " ajv-198-093-0407 at vsta dot org
2012-10-24 22:05 ` manu at gcc dot gnu.org
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