class AllocationOrder

Declaration

class AllocationOrder { /* full declaration omitted */ };

Declared at: llvm/lib/CodeGen/AllocationOrder.h:29

Method Overview

• public AllocationOrder(unsigned int VirtReg, const llvm::VirtRegMap & VRM, const llvm::RegisterClassInfo & RegClassInfo, const llvm::LiveRegMatrix * Matrix)
• public ArrayRef<llvm::MCPhysReg> getOrder() const
• public bool isHint() const
• public bool isHint(unsigned int PhysReg) const
• public unsigned int next(unsigned int Limit = 0)
• public unsigned int nextWithDups(unsigned int Limit)
• public void rewind()

Methods

¶AllocationOrder(
    unsigned int VirtReg,
    const llvm::VirtRegMap& VRM,
    const llvm::RegisterClassInfo& RegClassInfo,
    const llvm::LiveRegMatrix* Matrix)

Description

Create a new AllocationOrder for VirtReg.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:43

Parameters

unsigned int VirtReg

Virtual register to allocate for.

const llvm::VirtRegMap& VRM

Virtual register map for function.

const llvm::RegisterClassInfo& RegClassInfo

Information about reserved and allocatable registers.

const llvm::LiveRegMatrix* Matrix

¶ArrayRef<llvm::MCPhysReg> getOrder() const

Description

Get the allocation order without reordered hints.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:49

¶bool isHint() const

Description

Return true if the last register returned from next() was a preferred register.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:87

¶bool isHint(unsigned int PhysReg) const

Description

Return true if PhysReg is a preferred register.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:90

Parameters

unsigned int PhysReg

¶unsigned int next(unsigned int Limit = 0)

Description

Return the next physical register in the allocation order, or 0. It is safe to call next() again after it returned 0, it will keep returning 0 until rewind() is called.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:54

Parameters

unsigned int Limit = 0

¶unsigned int nextWithDups(unsigned int Limit)

Description

As next(), but allow duplicates to be returned, and stop before the Limit'th register in the RegisterClassInfo allocation order. This can produce more than Limit registers if there are hints.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:73

Parameters

unsigned int Limit

¶void rewind()

Description

Start over from the beginning.

Declared at: llvm/lib/CodeGen/AllocationOrder.h:84