[PATCH] D67257: New statepoint spilling mechanism

[zuojian lin via Phabricator via llvm-commits]

linzj created this revision.
linzj added reviewers: arsenm, igor-laevsky, stoklund, qcolombet, myatsina.
Herald added subscribers: llvm-commits, ychen, arphaman, hiraditya, wdng, MatzeB.
Herald added a project: LLVM.

Remove the original statepoint's spill mechanism. New mechanism relies on LLVM's greedy register allocator. The original one has it own spill management, which cause conflict in some situation. There would be a chaotic code which contain lots of memory reads/writes, and much larger stack size.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D67257

Files:
  llvm/include/llvm/CodeGen/FunctionLoweringInfo.h
  llvm/include/llvm/CodeGen/LiveRegMatrix.h
  llvm/include/llvm/CodeGen/SlotIndexes.h
  llvm/lib/CodeGen/CalcSpillWeights.cpp
  llvm/lib/CodeGen/InlineSpiller.cpp
  llvm/lib/CodeGen/InterferenceCache.cpp
  llvm/lib/CodeGen/LiveRegMatrix.cpp
  llvm/lib/CodeGen/RegAllocGreedy.cpp
  llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
  llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
  llvm/lib/CodeGen/SelectionDAG/StatepointLowering.h
  llvm/lib/CodeGen/SlotIndexes.cpp
  llvm/lib/CodeGen/SplitKit.cpp
  llvm/test/CodeGen/X86/statepoint-no-early-ldr.ll

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