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2018 Aug 11
2
MachineInstr sizes for ARM jumptables
...yte or halfword entries.
Additionally, when trying to optimize for table size later in
optimizeThumb2JumpTables, the opcode is updated without updating the
size (lib/Target/ARM/ARMConstantIslandPass.cpp:2229):
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unsigned JTOpc = ByteOk ? ARM::JUMPTABLE_TBB : ARM::JUMPTABLE_TBH;
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It seems to me, that the size of that MachineInstr is not used in any
critical calculations (or at all), so it maybe has no consequences
observable in the produced binary. I am however...