mirror of
https://github.com/intel/llvm.git
synced 2026-02-02 02:00:03 +08:00
792b10978d
Summary: The option `-mpad-max-prefix-size` performs some checking and delegate to MC option `-x86-pad-max-prefix-size`. This option is designed for eliminate NOPs when we need to align something by adding redundant prefixes to instructions, e.g. it can be used along with `-malign-branch`, `-malign-branch-boundary` to prefix padding branch. It has similar (but slightly different) effect as GAS's option `-malign-branch-prefix-size`, e.g. `-mpad-max-prefix-size` can also elminate NOPs emitted by align directive, so we use a different name here. I remove the option `-malign-branch-prefix-size` since is unimplemented and not needed. If we need to be compatible with GAS, we can make `-malign-branch-prefix-size` an alias for this option later. Reviewers: jyknight, reames, MaskRay, craig.topper, LuoYuanke Reviewed By: MaskRay, LuoYuanke Subscribers: annita.zhang, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D77628