[PATCH] D39743: [ValueLattice] Use PointerIntPair (WIP).

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.

This is a first version of a patch that tries to reduce the memory
consumption of value lattices by using a pointer to ConstantRange, mentioned
in PR26921.

This is still work in progress and I am not entirely happy with passing
the ConstantRange pool around everywhere. But maybe someone has some
thoughts already.

Also the plan is to use reference counting to remove ConstantRanges
from the pool as they become unused. That's not implemented yet.


https://reviews.llvm.org/D39743

Files:
  include/llvm/ADT/APInt.h
  include/llvm/Analysis/ValueLattice.h
  include/llvm/IR/ConstantRange.h
  lib/Analysis/LazyValueInfo.cpp
  lib/Analysis/ValueLattice.cpp
  lib/IR/LLVMContextImpl.h
  lib/Transforms/Scalar/SCCP.cpp
  unittests/Analysis/ValueLatticeTest.cpp

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