[mlir] Execute same operand name constraints before user constraints. (#162526)

For a pattern like this:

    Pat<(MyOp $x, $x),
        (...),
        [(MyCheck $x)]>;

The old implementation generates:

    Pat<(MyOp $x0, $x1),
        (...),
        [(MyCheck $x0),
         ($x0 == $x1)]>;

This is not very straightforward, because the $x name appears in the
source pattern; it's attempting to assume equality check will be
performed as part of the source pattern matching.

This commit moves the equality checks before the other constraints,
i.e.:

    Pat<(MyOp $x0, $x1),
        (...),
        [($x0 == $x1),
         (MyCheck $x0)]>;

0 files changed, 0 insertions, 0 deletions