LLVM: llvm::LiveRangeEdit Class Reference (original) (raw)
#include "[llvm/CodeGen/LiveRangeEdit.h](LiveRangeEdit%5F8h%5Fsource.html)"
| Public Member Functions | |
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| LiveRangeEdit (const LiveInterval *parent, SmallVectorImpl< Register > &newRegs, MachineFunction &MF, LiveIntervals &lis, VirtRegMap *vrm, Delegate *delegate=nullptr, SmallPtrSet< MachineInstr *, 32 > *deadRemats=nullptr) | |
| Create a LiveRangeEdit for breaking down parent into smaller pieces. | |
| ~LiveRangeEdit () override | |
| const LiveInterval & | getParent () const |
| Register | getReg () const |
| iterator | begin () const |
| iterator | end () const |
| unsigned | size () const |
| bool | empty () const |
| Register | get (unsigned idx) const |
| void | pop_back () |
| pop_back - It allows LiveRangeEdit users to drop new registers. | |
| ArrayRef< Register > | regs () const |
| Register | createFrom (Register OldReg) |
| createFrom - Create a new virtual register based on OldReg. | |
| LiveInterval & | createEmptyInterval () |
| create - Create a new register with the same class and original slot as parent. | |
| Register | create () |
| bool | canRematerializeAt (Remat &RM, SlotIndex UseIdx) |
| canRematerializeAt - Determine if RM.Orig can be rematerialized at UseIdx. | |
| SlotIndex | rematerializeAt (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register DestReg, const Remat &RM, const TargetRegisterInfo &, bool Late=false, unsigned SubIdx=0, MachineInstr *ReplaceIndexMI=nullptr) |
| rematerializeAt - Rematerialize RM.ParentVNI into DestReg by inserting an instruction into MBB before MI. | |
| void | markRematerialized (const VNInfo *ParentVNI) |
| markRematerialized - explicitly mark a value as rematerialized after doing it manually. | |
| bool | didRematerialize (const VNInfo *ParentVNI) const |
| didRematerialize - Return true if ParentVNI was rematerialized anywhere. | |
| void | eraseVirtReg (Register Reg) |
| eraseVirtReg - Notify the delegate that Reg is no longer in use, and try to erase it from LIS. | |
| void | eliminateDeadDefs (SmallVectorImpl< MachineInstr * > &Dead, ArrayRef< Register > RegsBeingSpilled={}) |
| eliminateDeadDefs - Try to delete machine instructions that are now dead (allDefsAreDead returns true). | |
| void | calculateRegClassAndHint (MachineFunction &, VirtRegAuxInfo &) |
| calculateRegClassAndHint - Recompute register class and hint for each new register. |
Definition at line 42 of file LiveRangeEdit.h.
◆ iterator
Iterator for accessing the new registers added by this edit.
Definition at line 138 of file LiveRangeEdit.h.
Create a LiveRangeEdit for breaking down parent into smaller pieces.
Parameters
| parent | The register being spilled or split. |
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| newRegs | List to receive any new registers created. This needn't be empty initially, any existing registers are ignored. |
| MF | The MachineFunction the live range edit is taking place in. |
| lis | The collection of all live intervals in this function. |
| vrm | Map of virtual registers to physical registers for this function. If NULL, no virtual register map updates will be done. This could be the case if called before Regalloc. |
| deadRemats | The collection of all the instructions defining an original reg and are dead after remat. |
Definition at line 118 of file LiveRangeEdit.h.
References size().
◆ ~LiveRangeEdit()
| llvm::LiveRangeEdit::~LiveRangeEdit ( ) | inlineoverride |
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◆ begin()
| iterator llvm::LiveRangeEdit::begin ( ) const | inline |
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◆ calculateRegClassAndHint()
calculateRegClassAndHint - Recompute register class and hint for each new register.
Definition at line 403 of file LiveRangeEdit.cpp.
References llvm::VirtRegAuxInfo::calculateSpillWeightAndHint(), llvm::dbgs(), get(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), I, LLVM_DEBUG, llvm::printReg(), llvm::LiveInterval::reg(), Size, size(), and TRI.
◆ canRematerializeAt()
◆ create()
| Register llvm::LiveRangeEdit::create ( ) | inline |
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◆ createEmptyInterval()
| LiveInterval & llvm::LiveRangeEdit::createEmptyInterval ( ) | inline |
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create - Create a new register with the same class and original slot as parent.
Definition at line 162 of file LiveRangeEdit.h.
References getReg().
◆ createFrom()
◆ didRematerialize()
| bool llvm::LiveRangeEdit::didRematerialize ( const VNInfo * ParentVNI) const | inline |
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didRematerialize - Return true if ParentVNI was rematerialized anywhere.
Definition at line 199 of file LiveRangeEdit.h.
◆ eliminateDeadDefs()
eliminateDeadDefs - Try to delete machine instructions that are now dead (allDefsAreDead returns true).
This may cause live intervals to be trimmed and further dead efs to be eliminated. RegsBeingSpilled lists registers currently being spilled by the register allocator. These registers should not be split into new intervals as currently those new intervals are not guaranteed to spill.
Definition at line 344 of file LiveRangeEdit.cpp.
References llvm::SetVector< T, Vector, Set, N >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::is_contained(), llvm::SetVector< T, Vector, Set, N >::pop_back_val(), llvm::LiveInterval::reg(), Register, and llvm::LiveRange::RenumberValues().
◆ empty()
| bool llvm::LiveRangeEdit::empty ( ) const | inline |
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◆ end()
| iterator llvm::LiveRangeEdit::end ( ) const | inline |
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◆ eraseVirtReg()
| void LiveRangeEdit::eraseVirtReg | ( | Register | Reg | ) |
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eraseVirtReg - Notify the delegate that Reg is no longer in use, and try to erase it from LIS.
Definition at line 107 of file LiveRangeEdit.cpp.
◆ get()
◆ getParent()
◆ getReg()
| Register llvm::LiveRangeEdit::getReg ( ) const | inline |
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◆ markRematerialized()
| void llvm::LiveRangeEdit::markRematerialized ( const VNInfo * ParentVNI) | inline |
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markRematerialized - explicitly mark a value as rematerialized after doing it manually.
Definition at line 194 of file LiveRangeEdit.h.
◆ pop_back()
| void llvm::LiveRangeEdit::pop_back ( ) | inline |
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pop_back - It allows LiveRangeEdit users to drop new registers.
The context is when an original def instruction of a register is dead after rematerialization, we still want to keep it for following rematerializations. We save the def instruction in DeadRemats, and replace the original dst register with a new dummy register so the live range of original dst register can be shrinked normally. We don't want to allocate phys register for the dummy register, so we want to drop it from the NewRegs set.
Definition at line 153 of file LiveRangeEdit.h.
◆ regs()
◆ rematerializeAt()
rematerializeAt - Rematerialize RM.ParentVNI into DestReg by inserting an instruction into MBB before MI.
The new instruction is mapped, but liveness is not updated. If ReplaceIndexMI is not null it will be replaced by new MI in the index map. Return the SlotIndex of the new instruction.
Definition at line 84 of file LiveRangeEdit.cpp.
References assert(), MBB, and MI.
◆ size()
| unsigned llvm::LiveRangeEdit::size ( ) const | inline |
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The documentation for this class was generated from the following files:
- include/llvm/CodeGen/LiveRangeEdit.h
- lib/CodeGen/LiveRangeEdit.cpp