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<h4 class="subsection">10.7.5 Jumps</h4>
<p><a name="index-Jumps-1941"></a>
Other jumps are expressed by either <code>GOTO_EXPR</code> or
<code>RETURN_EXPR</code>.
<p>The operand of a <code>GOTO_EXPR</code> must be either a label or a
variable containing the address to jump to.
<p>The operand of a <code>RETURN_EXPR</code> is either <code>NULL_TREE</code>,
<code>RESULT_DECL</code>, or a <code>MODIFY_EXPR</code> which sets the return
value. It would be nice to move the <code>MODIFY_EXPR</code> into a
separate statement, but the special return semantics in
<code>expand_return</code> make that difficult. It may still happen in
the future, perhaps by moving most of that logic into
<code>expand_assignment</code>.
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