[PATCH] D150936: [Statepoints] Support for compressed pointers in the statepoint emission pass

[Loïc Ottet via Phabricator via llvm-commits]

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Adds a new GCStrategy to support two types of tracked pointers in the RewriteStatepointsForGC pass. When using this strategy, pointers in addrspace(2) will be saved as depot parameters to the rewritten statepoint calls, in addition to being inserted as GC parameters. This patch has been used by the LLVM backend of GraalVM's Native Image project in production for over a year with no major issues.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150936

Files:
  llvm/include/llvm/IR/GCStrategy.h
  llvm/include/llvm/IR/IRBuilder.h
  llvm/lib/IR/BuiltinGCs.cpp
  llvm/lib/IR/IRBuilder.cpp
  llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp

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