[PATCH] D47077: [RFC][Patch 2/3] Add a MCSubtargetInfo hook to resolve variant scheduling classes.

[Andrea Di Biagio via Phabricator via llvm-commits]

andreadb created this revision.
andreadb added reviewers: RKSimon, filcab, gbedwell, atrick, MatzeB, rengolin, javed.absar, ab.

This patch is the second of a sequence of three patches related to LLVM-dev RFC "MC support for variant scheduling classes". http://lists.llvm.org/pipermail/llvm-dev/2018-May/123181.html

This patch requires https://reviews.llvm.org/D46695 to be applied first.

This patch introduces a new method named `MCSubtargetInfo::resolveVariantSchedClass()`, which can be used to resolve variant classes when the input is a MCInst.

This patch also teaches the SubtargetEmitter how to automatically generate the definition of that new method in a sub-class of MCSubtargetInfo named XXXGenMCSubtargetInfo (where XXX is the name of the Target).


https://reviews.llvm.org/D47077

Files:
  TableGen/InstrInfoEmitter.cpp
  TableGen/SubtargetEmitter.cpp
  llvm/MC/MCSubtargetInfo.h

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