On Wed, Oct 10, 2012 at 10:14 PM, Vladimir Makarov <vmaka...@redhat.com> wrote: > It is also interesting that your IRA range patch results in > different code generation (i can not explain it too now). I saw the same > on a small test (black jack playing and betting strategy).
I haven't looked into this, but I'm guessing this is because functions whose semantics depend on the number of program points, like build_conflict_bit_table, will behave differently. For example, with my patch there are significantly fewer program points and as a result OBJECT_MIN/OBJECT_MAX take on smaller values. For build_conflict_bit_table this leads to a different cost metric to decide whether the conflict table is small enough to build. Probably other functions respond similarly to my patch, but I don't know IRA well enough to say :-) In any case, bootstrap&test passed (with and without checking enabled) on x86_64-unknown-linux-gnu and powerpc64-unknown-linux-gnu so I intend to commit the patch (with a few comment typos fixed) today or tomorrow. Ciao! Steven
