Fangrui Song b61a4aaca5 [MC] Default MCContext::UseNamesOnTempLabels to false and only set it to true for MCAsmStreamer ...

Only MCAsmStreamer (assembly output) needs to keep names of temporary labels created by
MCContext::createTempSymbol().

This change made the rL236642 optimization available for cc2as and
probably some other users.

This eliminates a behavior difference between llvm-mc -filetype=obj and cc1as, which caused
https://reviews.llvm.org/D74006#1890487

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D75097

2020-02-25 18:23:10 -08:00

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