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[AArch64][GlobalISel] Support tail calling with swiftself parameters
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Authored by paquette on Sep 12 2019, 12:01 PM.

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Summary

Swiftself uses a callee-saved register. We can tail call when the register used in the caller and callee is the same.

This behaviour is equivalent to that in TargetLowering::parametersInCSRMatch.

Update call-translator-tail-call.ll to verify that we can do this. When we support inline assembly, we can write a check similar to the one in the general swiftself.ll. For now, we need to verify that we get the correct COPY instruction after call lowering.

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rL LLVM

Event Timeline

paquette created this revision.Sep 12 2019, 12:01 PM
aemerson accepted this revision.Sep 12 2019, 2:51 PM

LGTM.

This revision is now accepted and ready to land.Sep 12 2019, 2:51 PM
This revision was automatically updated to reflect the committed changes.