[PATCH] D132053: [BOLT] Fix ignored LP at fragment start
Fabian Parzefall via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Aug 17 11:30:08 PDT 2022
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If the first block of a fragment is also a landing pad, the landing pad
is not used if an exception is thrown. This is because the landing pad
is at the same start address that the corresponding LSDA describes. In
that case, the offset in the call site records to refer to that landing
pad is zero, and a zero offset is interpreted by the personality
function as "no handler" and ignored.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D132053
Files:
bolt/lib/Core/BinaryEmitter.cpp
bolt/test/runtime/X86/Inputs/lp-fragment-start.fdata
bolt/test/runtime/X86/lp-fragment-start.s
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