[Bug middle-end/40157] New: [4.4 Regression] ICE with -floop-block

[Bug middle-end/40157] New: [4.4 Regression] ICE with -floop-block

[arthur dot loiret at gmail dot com]

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Hi,

With this simple testcase:

int buffer[256*256];
int main(void)
{
    int *dest = buffer;
    int x, y;
    for(x = 0; x < 256; x++)
        for(y = 0; y < 256; y++)
            *dest++ = 0;
    return 0;
}

We get an ICE:

% gcc-4.4 -O1 -floop-block foo.c -o foo
foo.c: In function ‘main’:
foo.c:2: internal compiler error: in expand_scalar_variables_expr, at
graphite.c:4295
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.4/README.Bugs> for instructions.


Thanks.


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           Summary: [4.4 Regression]  ICE with -floop-block
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: arthur dot loiret at gmail dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40157

[Bug tree-optimization/40157] ICE with -floop-block

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-05-15 11:05 -------
Not a regression, -floop-block is new.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |spop at gcc dot gnu dot org
          Component|middle-end                  |tree-optimization
           Keywords|                            |ice-on-valid-code
            Summary|[4.4 Regression]  ICE with -|ICE with -floop-block
                   |floop-block                 |
            Version|unknown                     |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40157

[Bug tree-optimization/40157] ICE with -floop-block

[spop at gcc dot gnu dot org]

------- Comment #2 from spop at gcc dot gnu dot org  2009-05-15 17:49 -------
This problem is fixed in the Graphite branch.  I guess that the
problem comes from the fact that in GCC4.4 we did not handled
INDIRECT_REF in expand_scalar_variables_expr.  

Should I back-port that code?

Thanks,
Sebastian


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40157

[Bug tree-optimization/40157] ICE with -floop-block

[debian-gcc at lists dot debian dot org]

------- Comment #3 from debian-gcc at lists dot debian dot org  2009-05-16 12:48 -------
a patch would be appreciated, even if it's not applied directly in the 4.4
branch.

  Matthias


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40157

[Bug tree-optimization/40157] ICE with -floop-block

[spop at gcc dot gnu dot org]

------- Comment #4 from spop at gcc dot gnu dot org  2009-10-15 16:27 -------
I do not intend to backport all the changes from graphite GCC4.5 to GCC4.4.
This testcase is now part of the graphite testsuite and works with -floop-block
in the graphite branch.

Sebastian


-- 

spop at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40157