Method extendInteger

compiler/asserts.go:265–276

extendInteger extends the value to at least targetType using a zero or sign extend. The resulting value is not truncated: it may still be bigger than targetType.

(value llvm.Value, valueType types.Type, targetType llvm.Type)

// extend. The resulting value is not truncated: it may still be bigger than
// targetType.
func (b *builder) extendInteger(value llvm.Value, valueType types.Type, targetType llvm.Type) llvm.Value {
	if value.Type().IntTypeWidth() < targetType.IntTypeWidth() {
		if valueType.Underlying().(*types.Basic).Info()&types.IsUnsigned != 0 {
			// Unsigned, so zero-extend to the target type.
			value = b.CreateZExt(value, targetType, "")
		} else {
			// Signed, so sign-extend to the target type.
			value = b.CreateSExt(value, targetType, "")
		}
	}
	return value
}