Author: Serguei Katkov Date: 2021-01-13T11:39:34+07:00 New Revision: 157efd84abf812c1689ba6a9ecb4da2b87dde756
URL: https://github.com/llvm/llvm-project/commit/157efd84abf812c1689ba6a9ecb4da2b87dde756 DIFF: https://github.com/llvm/llvm-project/commit/157efd84abf812c1689ba6a9ecb4da2b87dde756.diff LOG: [Statepoint Lowering] Add an option to allow use gc values in regs for landing pad Default value is not changed, so it is NFC actually. The option allows to use gc values on registers in landing pads. Reviewers: reames, dantrushin Reviewed By: reames, dantrushin Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D94469 Added: Modified: llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp Removed: ################################################################################ diff --git a/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp index 5638feaf1540..0172646c22ec 100644 --- a/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp @@ -64,6 +64,10 @@ cl::opt<bool> UseRegistersForDeoptValues( "use-registers-for-deopt-values", cl::Hidden, cl::init(false), cl::desc("Allow using registers for non pointer deopt args")); +cl::opt<bool> UseRegistersForGCPointersInLandingPad( + "use-registers-for-gc-values-in-landing-pad", cl::Hidden, cl::init(false), + cl::desc("Allow using registers for gc pointer in landing pad")); + cl::opt<unsigned> MaxRegistersForGCPointers( "max-registers-for-gc-values", cl::Hidden, cl::init(0), cl::desc("Max number of VRegs allowed to pass GC pointer meta args in")); @@ -549,14 +553,15 @@ lowerStatepointMetaArgs(SmallVectorImpl<SDValue> &Ops, // Pointers used on exceptional path of invoke statepoint. // We cannot assing them to VRegs. SmallSet<SDValue, 8> LPadPointers; - if (auto *StInvoke = dyn_cast_or_null<InvokeInst>(SI.StatepointInstr)) { - LandingPadInst *LPI = StInvoke->getLandingPadInst(); - for (auto *Relocate : SI.GCRelocates) - if (Relocate->getOperand(0) == LPI) { - LPadPointers.insert(Builder.getValue(Relocate->getBasePtr())); - LPadPointers.insert(Builder.getValue(Relocate->getDerivedPtr())); - } - } + if (!UseRegistersForGCPointersInLandingPad) + if (auto *StInvoke = dyn_cast_or_null<InvokeInst>(SI.StatepointInstr)) { + LandingPadInst *LPI = StInvoke->getLandingPadInst(); + for (auto *Relocate : SI.GCRelocates) + if (Relocate->getOperand(0) == LPI) { + LPadPointers.insert(Builder.getValue(Relocate->getBasePtr())); + LPadPointers.insert(Builder.getValue(Relocate->getDerivedPtr())); + } + } LLVM_DEBUG(dbgs() << "Deciding how to lower GC Pointers:\n"); _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
