Move context specialization flag into CompilationInfo.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/507603003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23410 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Schedule floating control.

This CL makes several changes to the scheduling algorithm to handle control
flow that is not connected to End. Such control nodes constitute "floating
control islands" that must be linearized by the schedule. This is done
by considering such nodes to be schedulable, and then editing the control
dependencies after a first pass of scheduling. Then a subsequent pass of
scheduling will place all nodes correctly into the fully connected graph.

R=mstarzinger@chromium.org, rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/499363002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23411 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix win32.

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/508653002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23412 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'