go/src/cmd/compile/internal/types2/gcsizes.go

type gcSizes …

func (s *gcSizes) Alignof(T Type) (result int64) { … }

func (s *gcSizes) Offsetsof(fields []*Var) []int64 { … }

func (s *gcSizes) Sizeof(T Type) int64 { … }

// gcSizesFor returns the Sizes used by gc for an architecture.
// The result is a nil *gcSizes pointer (which is not a valid types.Sizes)
// if a compiler/architecture pair is not known.
func gcSizesFor(compiler, arch string) *gcSizes { … }