ΒΆbool isNullOrNullSplat(
    const llvm::MachineInstr& MI,
    const llvm::MachineRegisterInfo& MRI,
    bool AllowUndefs = false)

Description

Return true if the value is a constant 0 integer or a splatted vector of a constant 0 integer (with no undefs if \p AllowUndefs is false). This will handle G_BUILD_VECTOR and G_BUILD_VECTOR_TRUNC as truncation is not an issue for null values.

Declared at: llvm/include/llvm/CodeGen/GlobalISel/Utils.h:438

Parameters

const llvm::MachineInstr& MI
const llvm::MachineRegisterInfo& MRI
bool AllowUndefs = false