28622f9088
In order to run register allocation after scheduling, it is sometimes necessary to be able to insert instructions into an already-scheduled program. This is suboptimal, since it forces us to do a worst-case scheduling, but it is nevertheless required for correct handling of spills/fills. Let's add helpers to insert instructions as standalone bundles for use in spilling code. These helpers are minimal -- they *only* work on load/store ops or moves. They should not be used for anything but register spilling; any other instructions should be added prior to the schedule. Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
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