[PATCH] D80714: [StatepointLowering] Handle UNDEF gc values.

[Denis Antrushin via Phabricator via llvm-commits]

dantrushin created this revision.
dantrushin added reviewers: reames, skatkov, anna.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
dantrushin marked an inline comment as done.
dantrushin added inline comments.


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Comment at: llvm/include/llvm/CodeGen/GCStrategy.h:77
 
-  bool NeededSafePoints = false;    ///< if set, calls are inferred to be safepoints
+  bool NeededSafePoints = false; ///< if set, calls are inferred to be safepoints
   bool UsesMetadata = false;     ///< If set, backend must emit metadata tables.
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Should this be spelled `NeedsSafePoints` (needs vs. needed) ?


Add a hook to GCStrategy telling if GC wants to relocate UNDEF
values. If it does not, we can skip spilling/relocating them.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80714

Files:
  llvm/include/llvm/CodeGen/GCStrategy.h
  llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
  llvm/test/CodeGen/X86/statepoint-uniqueing.ll

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