[PATCH] D150009: [AArch64CompressJumpTables] Prevent compression when block alignment is bigger than function alignment.

[Paul Walker via Phabricator via llvm-commits]

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AArch64CompressJumpTables assumes functions are perfectly aligned
when compared to other algnments within the function. It does this
so zero can be used as the function's entry address with all blocks
offseted from this.  However, when a block alignment is bigger than
its function's alignment accurate block offsets cannot be computed,
making the current compression algorithm unsafe.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150009

Files:
  llvm/lib/Target/AArch64/AArch64CompressJumpTables.cpp
  llvm/test/CodeGen/AArch64/jump-table-compress.mir

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