Now that we have simplified some instructions in the loop, walk over it and constant prop, dce, and fold control flow where possible. Note that this is effectively a very simple loop-structure-aware optimizer. During processing of this loop, L could very well be deleted, so it must not be used. FIXME: When the loop optimizer is more mature, separate this out to a new pass.
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected