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* [Bug rtl-optimization/28282]  New: Attempt to delete prologue/epilogue insn, again
@ 2006-07-06  9:27 ted at midg3t dot net
  2006-07-06  9:29 ` [Bug rtl-optimization/28282] " ted at midg3t dot net
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: ted at midg3t dot net @ 2006-07-06  9:27 UTC (permalink / raw)
  To: gcc-bugs

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In a bit of code with an out-of-bounds array access, the following ICN is
triggered:

$ gcc -c -O1 bug.c
bug.c: In function ‘func’:
bug.c:12: error: Attempt to delete prologue/epilogue insn:
(insn/f 64 63 65 0 (set (mem:SI (plus:SI (reg/f:SI 6 bp)
                (const_int -8 [0xfffffffffffffff8])) [0 S4 A8])
        (reg:SI 3 bx)) -1 (nil)
    (nil))
bug.c:12: internal compiler error: in propagate_one_insn, at flow.c:1699
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see <URL:file:///usr/share/doc/gcc-4.1/README.Bugs>.
Preprocessed source stored into /tmp/ccEvY67W.out file, please attach this to
your bugreport.

This appears to be different from bug 26945 as the test case attached to it
does not trigger any error on my machine.

The test case is as follows:

int global;
int func(int argc) {
        int* array[1];
        array[1] = &global; /* out of bounds, of course */

        if (something(array, argc))
                otherfunc(array);

        if (argc != 17)
                return 17;
}

$ /usr/bin/gcc -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,java,fortran,objc,obj-c++,ada,treelang --prefix=/usr
--enable-shared --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --enable-nls
--program-suffix=-4.1 --enable-__cxa_atexit --enable-clocale=gnu
--enable-libstdcxx-debug --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.1-1.4.2.0/jre --enable-mpfr
--with-tune=i686 --enable-checking=release i486-linux-gnu
Thread model: posix
gcc version 4.1.2 20060630 (prerelease) (Debian 4.1.1-6)


-- 
           Summary: Attempt to delete prologue/epilogue insn, again
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ted at midg3t dot net
 GCC build triplet: gcc version 4.1.2 20060630 (prerelease) (Debian 4.1.1-6)
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28282


^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2007-07-25 19:01 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-07-06  9:27 [Bug rtl-optimization/28282] New: Attempt to delete prologue/epilogue insn, again ted at midg3t dot net
2006-07-06  9:29 ` [Bug rtl-optimization/28282] " ted at midg3t dot net
2006-07-06  9:29 ` ted at midg3t dot net
2006-07-06  9:35 ` ted at midg3t dot net
2006-07-07  9:45 ` [Bug target/28282] " rguenth at gcc dot gnu dot org
2006-07-07  9:46 ` rguenth at gcc dot gnu dot org
2006-07-07  9:53 ` rguenth at gcc dot gnu dot org
2006-07-08  4:48 ` pinskia at gcc dot gnu dot org
2007-07-25 19:01 ` pinskia at gcc dot gnu dot org

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