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* [Bug c/39809] New: emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds
@ 2009-04-18 20:51 jbglaw at lug-owl dot de
2009-04-21 18:03 ` [Bug middle-end/39809] " pinskia at gcc dot gnu dot org
2009-04-21 21:33 ` jbglaw at lug-owl dot de
0 siblings, 2 replies; 4+ messages in thread
From: jbglaw at lug-owl dot de @ 2009-04-18 20:51 UTC (permalink / raw)
To: gcc-bugs
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While mass-building cross-compilers, I got this warning:
$ ./configure --target v850e-linux --prefix
/home/jbglaw/devel/build-temp-v850e-linux/usr --enable-languages=c,c++
--disable-libc --disable-libmudflap --disable-libssp --disable-multilib
--disable-shared --enable-static --with-system-zlib --enable-threads
$ make all-gcc
gcc -c -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wold-style-definition
-Wc++-compat -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -I.
-I. -I/home/jbglaw/devel/sources/gcc/gcc -I/home/jbglaw/devel/sources/gcc/gcc/.
-I/home/jbglaw/devel/sources/gcc/gcc/../include
-I/home/jbglaw/devel/sources/gcc/gcc/../libcpp/include
-I/home/jbglaw/devel/sources/gcc/gcc/../libdecnumber
-I/home/jbglaw/devel/sources/gcc/gcc/../libdecnumber/dpd -I../libdecnumber
/home/jbglaw/devel/sources/gcc/gcc/emit-rtl.c -o emit-rtl.o
/home/jbglaw/devel/sources/gcc/gcc/emit-rtl.c: In function âgen_rtx_REGâ:
/home/jbglaw/devel/sources/gcc/gcc/emit-rtl.c:608: warning: array subscript is
above array bounds
emit-rtl.c:
608 if (regno == (unsigned) PIC_OFFSET_TABLE_REGNUM
609 && fixed_regs[PIC_OFFSET_TABLE_REGNUM])
610 return pic_offset_table_rtx;
$ grep PIC_OFFSET_TABLE_REGNUM config/v850/*
$
$ grep PIC_OFFSET_TABLE_REGNUM defaults.h
#ifndef PIC_OFFSET_TABLE_REGNUM
#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
$ grep INVALID_REGNUM rtl.h
#define INVALID_REGNUM (~(unsigned int) 0)
Other targets triggering this warning:
$ zgrep gen_rtx_REG *.log.gz|cut -f 1 -d .
avr-linux
frv-linux
h8300-elf
v850e-linux
vax-linux
xtensa-linux
--
Summary: emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript
is above array bounds
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jbglaw at lug-owl dot de
GCC build triplet: i686-linux
GCC host triplet: i686-linux
GCC target triplet: v850e-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39809
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/39809] emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds
2009-04-18 20:51 [Bug c/39809] New: emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds jbglaw at lug-owl dot de
@ 2009-04-21 18:03 ` pinskia at gcc dot gnu dot org
2009-04-21 21:33 ` jbglaw at lug-owl dot de
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-04-21 18:03 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2009-04-21 18:02 -------
This warning is correct but incorrect as this code can never be invoked unless
there is a huge bug inside GCC but GCC's warning system does not know that.
What version of GCC are you using to build the cross compilers, 4.5.0?
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |middle-end
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39809
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/39809] emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds
2009-04-18 20:51 [Bug c/39809] New: emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds jbglaw at lug-owl dot de
2009-04-21 18:03 ` [Bug middle-end/39809] " pinskia at gcc dot gnu dot org
@ 2009-04-21 21:33 ` jbglaw at lug-owl dot de
1 sibling, 0 replies; 4+ messages in thread
From: jbglaw at lug-owl dot de @ 2009-04-21 21:33 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from jbglaw at lug-owl dot de 2009-04-21 21:32 -------
This is SVN trunk, fetched via GIT. With my last build, it was SVN rev 146349
which produces the warnings. At this point I also just realize that it might be
a nice thing to actually print out the array bounds as well as the current
(maligne) index that GCC warns about.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39809
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/39809] emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds
[not found] <bug-39809-4@http.gcc.gnu.org/bugzilla/>
@ 2012-01-08 22:04 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-08 22:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39809
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-08 22:04:16 UTC ---
Dup.
*** This bug has been marked as a duplicate of bug 44765 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-01-08 22:04 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2009-04-18 20:51 [Bug c/39809] New: emit-rtl.c:608(-> gen_rtx_REG): warning: array subscript is above array bounds jbglaw at lug-owl dot de
2009-04-21 18:03 ` [Bug middle-end/39809] " pinskia at gcc dot gnu dot org
2009-04-21 21:33 ` jbglaw at lug-owl dot de
[not found] <bug-39809-4@http.gcc.gnu.org/bugzilla/>
2012-01-08 22:04 ` pinskia at gcc dot gnu.org
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