[lldb] Fix prologue size calculation for discontinuous functions (#131597) When searching for the end of prologue, I'm only iterating through the address range (~basic block) which contains the function entry point. The reason for that is that even if some other range somehow contained the end-of-prologue marker, the fact that it's in a different range would imply it's reachable through some form of control flow, and that's usually not a good place to set an function entry breakpoint.
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