ΒΆOptional<llvm::RegOrConstant> getVectorSplat(
    const llvm::MachineInstr& MI,
    const llvm::MachineRegisterInfo& MRI)

Description

Examples: If called on the G_BUILD_VECTOR above, this will return a RegOrConstant containing %reg. In the above case, this will return a RegOrConstant containing 4.

Declared at: llvm/include/llvm/CodeGen/GlobalISel/Utils.h:466

Parameters

const llvm::MachineInstr& MI
const llvm::MachineRegisterInfo& MRI

Returns

a value when \p MI is a vector splat. The splat can be either a Register or a constant.