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77743c95a3
This is part of a move towards generalizing the alternate opcode mechanism and not just supporting (F)Add/(F)Sub counterparts. The patch embeds the AltOpcode in the InstructionsState instead of calling getAltOpcode so often. I'm hoping to eventually remove all uses of getAltOpcode and handle alternate opcode selection entirely within getSameOpcode, that will require us to use InstructionsState throughout the BoUpSLP call hierarchy (similar to some of the changes in D28907), which I will begin in future patches. Differential Revision: https://reviews.llvm.org/D48359 llvm-svn: 335134
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