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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>GIMPLE sequences (GNU Compiler Collection (GCC) Internals)</title> <meta name="description" content="GIMPLE sequences (GNU Compiler Collection (GCC) Internals)"> <meta name="keywords" content="GIMPLE sequences (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="GIMPLE.html#GIMPLE" rel="up" title="GIMPLE"> <link href="Sequence-iterators.html#Sequence-iterators" rel="next" title="Sequence iterators"> <link href="GIMPLE_005fWITH_005fCLEANUP_005fEXPR.html#GIMPLE_005fWITH_005fCLEANUP_005fEXPR" rel="prev" title="GIMPLE_WITH_CLEANUP_EXPR"> <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="GIMPLE-sequences"></a> <div class="header"> <p> Next: <a href="Sequence-iterators.html#Sequence-iterators" accesskey="n" rel="next">Sequence iterators</a>, Previous: <a href="Tuple-specific-accessors.html#Tuple-specific-accessors" accesskey="p" rel="prev">Tuple specific accessors</a>, Up: <a href="GIMPLE.html#GIMPLE" accesskey="u" rel="up">GIMPLE</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="GIMPLE-sequences-1"></a> <h3 class="section">12.9 GIMPLE sequences</h3> <a name="index-GIMPLE-sequences"></a> <p>GIMPLE sequences are the tuple equivalent of <code>STATEMENT_LIST</code>’s used in <code>GENERIC</code>. They are used to chain statements together, and when used in conjunction with sequence iterators, provide a framework for iterating through statements. </p> <p>GIMPLE sequences are of type struct <code>gimple_sequence</code>, but are more commonly passed by reference to functions dealing with sequences. The type for a sequence pointer is <code>gimple_seq</code> which is the same as struct <code>gimple_sequence</code> *. When declaring a local sequence, you can define a local variable of type struct <code>gimple_sequence</code>. When declaring a sequence allocated on the garbage collected heap, use the function <code>gimple_seq_alloc</code> documented below. </p> <p>There are convenience functions for iterating through sequences in the section entitled Sequence Iterators. </p> <p>Below is a list of functions to manipulate and query sequences. </p> <dl> <dt><a name="index-gimple_005fseq_005fadd_005fstmt"></a>GIMPLE function: <em>void</em> <strong>gimple_seq_add_stmt</strong> <em>(gimple_seq *seq, gimple g)</em></dt> <dd><p>Link a gimple statement to the end of the sequence *<code>SEQ</code> if <code>G</code> is not <code>NULL</code>. If *<code>SEQ</code> is <code>NULL</code>, allocate a sequence before linking. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fadd_005fseq"></a>GIMPLE function: <em>void</em> <strong>gimple_seq_add_seq</strong> <em>(gimple_seq *dest, gimple_seq src)</em></dt> <dd><p>Append sequence <code>SRC</code> to the end of sequence *<code>DEST</code> if <code>SRC</code> is not <code>NULL</code>. If *<code>DEST</code> is <code>NULL</code>, allocate a new sequence before appending. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fdeep_005fcopy"></a>GIMPLE function: <em>gimple_seq</em> <strong>gimple_seq_deep_copy</strong> <em>(gimple_seq src)</em></dt> <dd><p>Perform a deep copy of sequence <code>SRC</code> and return the result. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005freverse"></a>GIMPLE function: <em>gimple_seq</em> <strong>gimple_seq_reverse</strong> <em>(gimple_seq seq)</em></dt> <dd><p>Reverse the order of the statements in the sequence <code>SEQ</code>. Return <code>SEQ</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005ffirst"></a>GIMPLE function: <em>gimple</em> <strong>gimple_seq_first</strong> <em>(gimple_seq s)</em></dt> <dd><p>Return the first statement in sequence <code>S</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005flast"></a>GIMPLE function: <em>gimple</em> <strong>gimple_seq_last</strong> <em>(gimple_seq s)</em></dt> <dd><p>Return the last statement in sequence <code>S</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fset_005flast"></a>GIMPLE function: <em>void</em> <strong>gimple_seq_set_last</strong> <em>(gimple_seq s, gimple last)</em></dt> <dd><p>Set the last statement in sequence <code>S</code> to the statement in <code>LAST</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fset_005ffirst"></a>GIMPLE function: <em>void</em> <strong>gimple_seq_set_first</strong> <em>(gimple_seq s, gimple first)</em></dt> <dd><p>Set the first statement in sequence <code>S</code> to the statement in <code>FIRST</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005finit"></a>GIMPLE function: <em>void</em> <strong>gimple_seq_init</strong> <em>(gimple_seq s)</em></dt> <dd><p>Initialize sequence <code>S</code> to an empty sequence. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005falloc"></a>GIMPLE function: <em>gimple_seq</em> <strong>gimple_seq_alloc</strong> <em>(void)</em></dt> <dd><p>Allocate a new sequence in the garbage collected store and return it. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fcopy"></a>GIMPLE function: <em>void</em> <strong>gimple_seq_copy</strong> <em>(gimple_seq dest, gimple_seq src)</em></dt> <dd><p>Copy the sequence <code>SRC</code> into the sequence <code>DEST</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fempty_005fp"></a>GIMPLE function: <em>bool</em> <strong>gimple_seq_empty_p</strong> <em>(gimple_seq s)</em></dt> <dd><p>Return true if the sequence <code>S</code> is empty. </p></dd></dl> <dl> <dt><a name="index-bb_005fseq"></a>GIMPLE function: <em>gimple_seq</em> <strong>bb_seq</strong> <em>(basic_block bb)</em></dt> <dd><p>Returns the sequence of statements in <code>BB</code>. </p></dd></dl> <dl> <dt><a name="index-set_005fbb_005fseq"></a>GIMPLE function: <em>void</em> <strong>set_bb_seq</strong> <em>(basic_block bb, gimple_seq seq)</em></dt> <dd><p>Sets the sequence of statements in <code>BB</code> to <code>SEQ</code>. </p></dd></dl> <dl> <dt><a name="index-gimple_005fseq_005fsingleton_005fp"></a>GIMPLE function: <em>bool</em> <strong>gimple_seq_singleton_p</strong> <em>(gimple_seq seq)</em></dt> <dd><p>Determine whether <code>SEQ</code> contains exactly one statement. </p></dd></dl> <hr> <div class="header"> <p> Next: <a href="Sequence-iterators.html#Sequence-iterators" accesskey="n" rel="next">Sequence iterators</a>, Previous: <a href="Tuple-specific-accessors.html#Tuple-specific-accessors" accesskey="p" rel="prev">Tuple specific accessors</a>, Up: <a href="GIMPLE.html#GIMPLE" accesskey="u" rel="up">GIMPLE</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> </body> </html>