<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <!-- Copyright (C) 1988-2018 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with the Invariant Sections being "Funding Free Software", the Front-Cover Texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the section entitled "GNU Free Documentation License". (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development. --> <!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ --> <head> <title>Jumps (GNU Compiler Collection (GCC) Internals)</title> <meta name="description" content="Jumps (GNU Compiler Collection (GCC) Internals)"> <meta name="keywords" content="Jumps (GNU Compiler Collection (GCC) Internals)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="makeinfo"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link href="index.html#Top" rel="start" title="Top"> <link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> <link href="Statements.html#Statements" rel="up" title="Statements"> <link href="Cleanups.html#Cleanups" rel="next" title="Cleanups"> <link href="Empty-Statements.html#Empty-Statements" rel="prev" title="Empty Statements"> <style type="text/css"> <!-- a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} blockquote.smallquotation {font-size: smaller} div.display {margin-left: 3.2em} div.example {margin-left: 3.2em} div.lisp {margin-left: 3.2em} div.smalldisplay {margin-left: 3.2em} div.smallexample {margin-left: 3.2em} div.smalllisp {margin-left: 3.2em} kbd {font-style: oblique} pre.display {font-family: inherit} pre.format {font-family: inherit} pre.menu-comment {font-family: serif} pre.menu-preformatted {font-family: serif} pre.smalldisplay {font-family: inherit; font-size: smaller} pre.smallexample {font-size: smaller} pre.smallformat {font-family: inherit; font-size: smaller} pre.smalllisp {font-size: smaller} span.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <a name="Jumps"></a> <div class="header"> <p> Next: <a href="Cleanups.html#Cleanups" accesskey="n" rel="next">Cleanups</a>, Previous: <a href="Empty-Statements.html#Empty-Statements" accesskey="p" rel="prev">Empty Statements</a>, Up: <a href="Statements.html#Statements" accesskey="u" rel="up">Statements</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> </div> <hr> <a name="Jumps-1"></a> <h4 class="subsection">11.7.5 Jumps</h4> <a name="index-Jumps"></a> <p>Other jumps are expressed by either <code>GOTO_EXPR</code> or <code>RETURN_EXPR</code>. </p> <p>The operand of a <code>GOTO_EXPR</code> must be either a label or a variable containing the address to jump to. </p> <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>. </p> </body> </html>