Maksim Panchenko 1e4ee588fb [BOLT] Accept function start as valid jump table entry ...

Jump tables may contain a function start address. One real-world example
is when a target basic block contains a recursive tail call that is
later optimized/folded into a jump table target.

While analyzing a jump table, we treat start address similar to an
address past the end of the containing function (a result of
__builtin_unreachable), i.e. we require another "regular" entry for the
heuristic to proceed.

Reviewed By: Amir

Differential Revision: https://reviews.llvm.org/D156206

2023-07-26 13:25:08 -07:00

86 KiB

Raw Blame History

View Raw