[Bug tree-optimization/36033] New: Non-optimal vectorization of interleaved data of different types

[irar at il dot ibm dot com]

With the fix of pr35982, interleaved data of different types (of the same size)
can be vectorized only as a collection of single-element strided accesses,
causing redundant misaligned loads.

Better solution for such cases will be to perform all the vector loads and
extraction operations as if the data-refs were of the same type, and then
convert the extracted elements to the correct type if necessary (before
performing any operations on the extracted elements).

The testcase is gcc.dg/vect/fast-math-pr35982.c.


-- 
           Summary: Non-optimal vectorization of interleaved data of
                    different types
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: irar at il dot ibm dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36033