[PATCH] D87252: [Statepoints] Properly handle const base pointer.

[Denis Antrushin via Phabricator via llvm-commits]

dantrushin created this revision.
dantrushin added reviewers: reames, skatkov.
Herald added subscribers: llvm-commits, hiraditya.
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Current code in InstEmitter assumes all GC pointers are either
VRegs or stack slots - hence, taking only one operand.
But it is possible to have constant base, in which case it
occupies two machine operands.

Add a convinience function to StackMaps to get index of next
meta argument and use it in InsrEmitter to properly advance to
the next statepoint meta operand.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87252

Files:
  llvm/include/llvm/CodeGen/StackMaps.h
  llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
  llvm/lib/CodeGen/StackMaps.cpp
  llvm/test/CodeGen/X86/statepoint-vreg.ll

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