<html lang="en"> <head> <title>Adding a new GIMPLE statement code - GNU Compiler Collection (GCC) Internals</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="GNU Compiler Collection (GCC) Internals"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="GIMPLE.html#GIMPLE" title="GIMPLE"> <link rel="prev" href="Sequence-iterators.html#Sequence-iterators" title="Sequence iterators"> <link rel="next" href="Statement-and-operand-traversals.html#Statement-and-operand-traversals" title="Statement and operand traversals"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- Copyright (C) 1988-2015 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.--> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="Adding-a-new-GIMPLE-statement-code"></a> <p> Next: <a rel="next" accesskey="n" href="Statement-and-operand-traversals.html#Statement-and-operand-traversals">Statement and operand traversals</a>, Previous: <a rel="previous" accesskey="p" href="Sequence-iterators.html#Sequence-iterators">Sequence iterators</a>, Up: <a rel="up" accesskey="u" href="GIMPLE.html#GIMPLE">GIMPLE</a> <hr> </div> <h3 class="section">11.11 Adding a new GIMPLE statement code</h3> <p><a name="index-Adding-a-new-GIMPLE-statement-code-2500"></a> The first step in adding a new GIMPLE statement code, is modifying the file <code>gimple.def</code>, which contains all the GIMPLE codes. Then you must add a corresponding gimple_statement_base subclass located in <code>gimple.h</code>. This in turn, will require you to add a corresponding <code>GTY</code> tag in <code>gsstruct.def</code>, and code to handle this tag in <code>gss_for_code</code> which is located in <code>gimple.c</code>. <p>In order for the garbage collector to know the size of the structure you created in <code>gimple.h</code>, you need to add a case to handle your new GIMPLE statement in <code>gimple_size</code> which is located in <code>gimple.c</code>. <p>You will probably want to create a function to build the new gimple statement in <code>gimple.c</code>. The function should be called <code>gimple_build_</code><var>new-tuple-name</var>, and should return the new tuple as a pointer to the appropriate gimple_statement_base subclass. <p>If your new statement requires accessors for any members or operands it may have, put simple inline accessors in <code>gimple.h</code> and any non-trivial accessors in <code>gimple.c</code> with a corresponding prototype in <code>gimple.h</code>. <p>You should add the new statement subclass to the class hierarchy diagram in <code>gimple.texi</code>. </body></html>