[Bug tree-optimization/41008] New: ICE in vect_is_simple_reduction, at tree-vect-loop.c:1708

[p dot vanhoof at oma dot be]

The attached code generates an ICE on valid code with the following command
line parameters:

pvh@dogbert> gcc -O1 -ftree-vectorize -c hcmap.cpp
hcmap.cpp: In function ‘void map_do()’:
hcmap.cpp:5:6: internal compiler error: tree check: expected class
‘expression’, have ‘exceptional’ (ssa_name) in vect_is_simple_reduction, at
tree-vect-loop.c:1708
Please submit a full bug report,
.... etc.

pvh@dogbert> gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: /temp3/root/temp/gcc450/configure --prefix=/usr/local/gcc450
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 4.5.0 20090804 (experimental) (GCC)

(this is r150468 of the mainline). This bug only occurs on the mainline, not on
any of the release branches 4.4 and older. In case this helps, adding -m32
makes the bug go away.


-- 
           Summary: ICE in vect_is_simple_reduction, at tree-vect-
                    loop.c:1708
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: p dot vanhoof at oma dot be


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41008