LoopTripCount remove cache CycleMap

because Loop is not a stable object, it may invalid. so everytime do
real find inserted LoopTripCount

Signed-off-by: xiehuc <xiehuc@gmail.com>
fix ValueToEdge Pass

using opt -load <so> -profile-info-file=llvmprof.out -profile-loader
-profile-info-write=llvmprof.edge -Value-To-Edge <input.bc>

which input.bc is instrumented after

Signed-off-by: xiehuc <xiehuc@gmail.com>