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* [Bug c/17191] New: address taken prevents uninitialized variable warning
@ 2004-08-25 21:13 nomura at netapp dot com
2004-08-25 21:16 ` [Bug c/17191] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: nomura at netapp dot com @ 2004-08-25 21:13 UTC (permalink / raw)
To: gcc-bugs
Compiling this code with -O -Wall should warn that "i" is used without
being initialized. The presence of "p = &i" stops this warning
from being issued, but the address is not exposed in a way that could
affect i. (No path from the address taken to the use, and the variable
is local). If the uninit warning could be strengthened it would have
real benefits.
-- Source code:
int *p;
void foo ()
{
int i;
if (i < 100)
return;
p = &i;
}
-- Command line:
[gecko]$ xgcc-3.4 -v -c -O2 a.c -Wall -Werror
Reading specs from /u/nomura/dl/gcc-3.4.1_linux/gcc/specs
Configured with: ../gcc-3.4.1/configure --enable-languages=c,c++
--prefix=/x/sim/nomura/root.linux/gcc-3.4.1
Thread model: posix
gcc version 3.4.1
/u/nomura/dl/gcc-3.4.1_linux/gcc/cc1 -quiet -v -iprefix
/u/nomura/dl/gcc-3.4.1_linux/gcc/../lib/gcc/i686-pc-linux-gnu/3.4.1/ -isystem
/u/nomura/dl/gcc-3.4.1_linux/gcc/include a.c -quiet -dumpbase a.c
-mtune=pentiumpro -auxbase a -O2 -Wall -Werror -version -o /tmp/ccN7EB39.s
ignoring nonexistent directory
"/u/nomura/dl/gcc-3.4.1_linux/gcc/../lib/gcc/i686-pc-linux-gnu/3.4.1/include"
ignoring nonexistent directory
"/u/nomura/dl/gcc-3.4.1_linux/gcc/../lib/gcc/i686-pc-linux-gnu/3.4.1/../../../../i686-pc-linux-gnu/include"
ignoring nonexistent directory
"/x/sim/nomura/root.linux/gcc-3.4.1/lib/gcc/i686-pc-linux-gnu/3.4.1/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/u/nomura/dl/gcc-3.4.1_linux/gcc/include
/usr/local/include
/x/sim/nomura/root.linux/gcc-3.4.1/include
/x/sim/nomura/root.linux/gcc-3.4.1/lib/gcc/i686-pc-linux-gnu/3.4.1/include
/usr/include
End of search list.
GNU C version 3.4.1 (i686-pc-linux-gnu)
compiled by GNU C version 3.2 20020903 (Red Hat Linux 8.0 3.2-7).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
/x/sim/nomura/root.linux/gcc-3.4.1/lib/gcc/i686-pc-linux-gnu/3.4.1/../../../../i686-pc-linux-gnu/bin/as
--traditional-format -V -Qy -o a.o /tmp/ccN7EB39.s
GNU assembler version 2.15 (i686-pc-linux-gnu) using BFD version 2.15
[gecko]$
--
Summary: address taken prevents uninitialized variable warning
Product: gcc
Version: 3.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: nomura at netapp dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17191
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/17191] address taken prevents uninitialized variable warning
2004-08-25 21:13 [Bug c/17191] New: address taken prevents uninitialized variable warning nomura at netapp dot com
@ 2004-08-25 21:16 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-08-25 21:16 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-08-25 21:16 -------
*** This bug has been marked as a duplicate of 179 ***
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17191
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2004-08-25 21:16 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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2004-08-25 21:13 [Bug c/17191] New: address taken prevents uninitialized variable warning nomura at netapp dot com
2004-08-25 21:16 ` [Bug c/17191] " pinskia at gcc dot gnu dot org
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