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2018 Aug 11
2
MachineInstr sizes for ARM jumptables
...ing of byte 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 a...