checkInterference overloads

Synopses

Declared in <llvm/CodeGen/LiveRegMatrix.h>

Check for interference before assigning VirtReg to PhysReg.

InterferenceKind
checkInterference(
    LiveInterval const& VirtReg,
    MCRegister PhysReg);

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Check for interference in a segment that may prevent assignment to PhysReg.

bool
checkInterference(
    SlotIndex Start,
    SlotIndex End,
    MCRegister PhysReg);

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Return Value

  • Strongest interference kind found, or IK_Free if none.

  • True if some assigned interval interferes in [Start, End).]

Parameters

Name

Description

VirtReg

Virtual register live interval to assign.

PhysReg

Physical register candidate for assignment.

Start

Inclusive start of the slot‐index segment.

End

Exclusive end of the slot‐index segment.

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