[llvm-dev] Looking for tests for class ARMConstantIslands

Tim Northover via llvm-dev llvm-dev at lists.llvm.org
Thu Nov 16 03:04:35 PST 2017

Hi Ming,

On 16 November 2017 at 09:20, 章明 via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> Are these all relevant to the pass? Are there other relevant tests?

Your best bet is probably what's called "MIR tests", which are written
directly in the lower-level MachineInstr based representation and run
only the relevant pass. This gives earlier passes less opportunity to
mess with your code and break the really tight spacing requirements
needed to trigger ARMConstantIslands.

So take a look at constant-islands-cfg.mir and
v6-jumptable-clobber.mir, especially the first which looks like it was
written after the MIR representation improved (it has many fewer extra
useless details).



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