//
// If text is the empty string, the pragma is being returned
// to the handler unused, meaning it appeared before a non-declaration.
// The handler may wish to report an error. In this case, pos is the
// current parser position, not the position of the pragma itself.
// Blank specifies whether the line is blank before the pragma.

	// entry+1 and exit-1 are conceptually the bottom of the block (ordinary defs)
	// entry-1 and exit+1 are conceptually "just before" the block (conditions flowing in)
	//
	// This simplifies life if we wish to query information about x
	// when x is both an input to and output of a block.
	entry, exit int32
}

func (s *SparseTreeNode) String() string {
	return fmt.Sprintf("[%d,%d]", s.entry, s.exit)
}

// regInfo is much handier at the call site than it is when the AuxCall is being constructed,
// therefore do this lazily).
//
// TODO: there is a Clever Hack that allows pre-generation of a small-ish number of the slices
// of inputInfo and outputInfo used here, provided that we are willing to reorder the inputs
// and outputs from calls, so that all integer registers come first, then all floating registers.