[Bug tree-optimization/50576] New: Recent vector comparison changes cause an ICE

[Bug tree-optimization/50576] New: Recent vector comparison changes cause an ICE

[mgretton at sourceware dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50576

             Bug #: 50576
           Summary: Recent vector comparison changes cause an ICE
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mgretton@sourceware.org
                CC: artyom.shinkaroff@gmail.com,
                    richard.guenther@gmail.com
              Host: x86_64-linux-gnu
            Target: arm-none-eabi


Compiling the following (cut down from the
gcc.c-torture/execute/vector-compare-1.c test case):

/* try.c.  */
int
main (int argc, char *argv[])
{
  __attribute__ ((vector_size ((2) * sizeof (double)))) double d0;
  __attribute__ ((vector_size ((2) * sizeof (double)))) double d1;
  __attribute__ ((vector_size ((2) * sizeof (long long)))) long long idres;
    {
      idres = (d0 > d1);
    }
}
/* end of try.c.  */

with:

arm-none-eabi-gcc -mfpu=neon -mfloat-abi=softfp -mcpu=cortex-a9 -c try.c

Gives:

try.c: In function 'main':
try.c:3:1: error: invalid vector comparison resulting type
vector(2) long long int
idres = d0 > d1;

try.c:3:1: internal compiler error: verify_gimple failed

This was tested with trunk r179378.  

The issue was introduced by this patch
(http://gcc.gnu.org/ml/gcc-patches/2011-08/msg01088.html - checked in as
r179342), and has not been fixed by Richard Guenther's follow on patch
(http://gcc.gnu.org/ml/gcc-patches/2011-09/msg01933.html).

[Bug tree-optimization/50576] Recent vector comparison changes cause an ICE

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50576

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2011-09-30
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-30 10:49:43 UTC ---
is sizeof(long long) == sizeof (double)?

[Bug tree-optimization/50576] Recent vector comparison changes cause an ICE

[mgretton at sourceware dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50576

--- Comment #2 from Matthew Gretton-Dann <mgretton at sourceware dot org> 2011-09-30 10:58:03 UTC ---
(In reply to comment #1)
> is sizeof(long long) == sizeof (double)?

Yes - sizeof(long long) and sizeof(double) are both 8.

[Bug tree-optimization/50576] Recent vector comparison changes cause an ICE

[mgretton at sourceware dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50576

Matthew Gretton-Dann <mgretton at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from Matthew Gretton-Dann <mgretton at sourceware dot org> 2011-10-04 08:51:37 UTC ---
This has been fixed by the fixes for PR 50574