[Bug c/35122] New: gcc segfaults when compiling code with pointers to vector float

[Bug c/35122] New: gcc segfaults when compiling code with pointers to vector float

[hanappe at csl dot sony dot fr]

GCC version:
$ ppu-gcc -v
Using built-in specs.
Target: ppu
Configured with: ../toolchain/gcc/configure --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info --with-as=/usr/bin/ppu-as
--with-ld=/usr/bin/ppu-ld --enable-threads --with-system-zlib
--disable-checking --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-languages=c,c++,fortran,ada --disable-nls --enable-clocale=gnu
--enable-version-specific-runtime-libs --with-long-double-128
--program-prefix=ppu- --disable-bootstrap --host=ppu
--build=powerpc64-unknown-linux-gnu --target=ppu
Thread model: posix
gcc version 4.1.1

Platform: ppc64, PS3, Linux 2.6.21-1.3194.fc7

Code: 
#include <altivec.h>
#include <stdio.h>

int main(int argc, char** argv)
{
        vector float v =  { 1, 1, 1, 1 };
        vector float* vp = &v;
        fprintf(stderr, "%f\n",v[0]);       // OK
        fprintf(stderr, "%f\n",vp[0][0]);   // internal compiler error:
Segmentation fault
        return 0;
}

or:

#include <altivec.h>
#include <stdio.h>

int main(int argc, char** argv)
{
        vector float v =  { 1, 1, 1, 1 };
        vector float* vp = &v;
        fprintf(stderr, "%f\n",v[0]);       // OK
        fprintf(stderr, "%f\n",(*vp)[0]);   // internal compiler error:
Segmentation fault
        return 0;
}


Command line: ppu-gcc -g -c -maltivec bug.c -o bug.o 

Command output:
bug.c: In function 'main':
bug.c:9: internal compiler error: Segmentation fault


-- 
           Summary: gcc segfaults when compiling code with pointers to
                    vector float
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hanappe at csl dot sony dot fr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35122

[Bug c/35122] gcc segfaults when compiling code with pointers to vector float

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-02-07 15:27 -------
First off this is not a bug in the FSF GCC as the FSF GCC does not support
vector array access syntax so this should have been filed with the provider
that gave you the source.  Second off this has been since fixed in IBM's SDK
(but not yet released IIRC) (I should know I fixed it).

When this goes into the FSF GCC (which might be later next month if I get some
time), it should be fixed here too.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35122