func TestSameLength(t *testing.T) {
golden := []struct {
a, b types.Type
want bool
}{
{want: false, a: i32x2VecTyp, b: i32x3VecTyp},
{want: false, a: i32x3VecTyp, b: i32x2VecTyp},
{want: true, a: i32x2VecTyp, b: i32x2VecTyp},
{want: false, a: i32x2ArrTyp, b: i32x3ArrTyp},
{want: false, a: i32x3ArrTyp, b: i32x2ArrTyp},
{want: true, a: i32x2ArrTyp, b: i32x2ArrTyp},
{want: true, a: i32Typ, b: i64Typ},
{want: true, a: i64Typ, b: i32Typ},
{want: false, a: f32Typ, b: i32x2VecTyp},
{want: false, a: i32x2VecTyp, b: f32Typ},
{want: false, a: f32Typ, b: i32x2ArrTyp},
{want: false, a: i32x2ArrTyp, b: f32Typ},
{want: true, a: structTyp, b: f32Typ},
}
for i, g := range golden {
got := types.SameLength(g.a, g.b)
if got != g.want {
t.Errorf("i=%d: expected %v, got %v", i, g.want, got)
}
}
}
// NewSIToFP returns a constant expression which converts the signed integer
// constant (or constant vector) orig to the corresponding floating point
// constant (or constant vector).
func NewSIToFP(orig Constant, to types.Type) (*SIToFP, error) {
// Verify type of original integer constant (or constant vector).
if !types.IsInts(orig.Type()) {
return nil, fmt.Errorf("invalid signed integer to floating point conversion; expected integer constant (or constant vector) for orig, got %q", orig.Type())
}
// Verify target type.
if !types.IsFloats(to) {
return nil, fmt.Errorf("invalid signed integer to floating point conversion; expected floating point (or floating point vector) target type, got %q", to)
}
// Verify that both are either basic types or vectors of the same length.
if !types.SameLength(orig.Type(), to) {
return nil, fmt.Errorf("invalid signed integer to floating point conversion; cannot convert from %q to %q", orig.Type(), to)
}
return &SIToFP{orig: orig, to: to}, nil
}