Extend return register lifetime#3264

Merged

chakrabot merged 2 commits intochakra-core:release/1.6from

Cellule:users/micfer/ret

Jun 29, 2017

Commits on Jun 29, 2017

Keep the `Ret` instruction to extend the lifetime of the return register(s) then remove it in FinalLower.
Cellule
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Also change LowerRet on Arm
Cellule
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