[turbofan] Add MachineType to Phi.

TEST=cctest,compiler-unittests,mjsunit
R=mstarzinger@chromium.org, titzer@chromium.org

Review URL: https://codereview.chromium.org/545153002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23728 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[turbofan] Missing fix from last commit.

TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/538373003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23729 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Generalized division via multiplication.

We can now compute the magic numbers for all combinations of 32bit and
64bit (un)signed multiplications.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/532003004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23730 ce2b1a6d-e550-0410-aec6-3dcde31c8c00