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diff --git a/share/doc/gccint/RTL-Tests.html b/share/doc/gccint/RTL-Tests.html new file mode 100644 index 0000000..947422b --- /dev/null +++ b/share/doc/gccint/RTL-Tests.html @@ -0,0 +1,123 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 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 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: RTL Tests</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: RTL Tests"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: RTL Tests"> +<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="Testsuites.html#Testsuites" rel="up" title="Testsuites"> +<link href="Options.html#Options" rel="next" title="Options"> +<link href="GIMPLE-Tests.html#GIMPLE-Tests" rel="previous" title="GIMPLE Tests"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +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.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="RTL-Tests"></a> +<div class="header"> +<p> +Previous: <a href="GIMPLE-Tests.html#GIMPLE-Tests" accesskey="p" rel="previous">GIMPLE Tests</a>, Up: <a href="Testsuites.html#Testsuites" accesskey="u" rel="up">Testsuites</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="Support-for-testing-RTL-passes"></a> +<h3 class="section">7.11 Support for testing RTL passes</h3> + +<p>As of gcc 7, C functions can be tagged with <code>__RTL</code> to indicate that the +function body will be RTL, rather than C. For example: +</p> +<div class="smallexample"> +<pre class="smallexample">double __RTL (startwith ("ira")) test (struct foo *f, const struct bar *b) +{ + (function "test" + [...snip; various directives go in here...] + ) ;; function "test" +} +</pre></div> + +<p>The <code>startwith</code> argument indicates at which pass to begin. +</p> +<p>The parser expects the RTL body to be in the format emitted by this +dumping function: +</p> +<div class="smallexample"> +<pre class="smallexample">DEBUG_FUNCTION void +print_rtx_function (FILE *outfile, function *fn, bool compact); +</pre></div> + +<p>when "compact" is true. So you can capture RTL in the correct format +from the debugger using: +</p> +<div class="smallexample"> +<pre class="smallexample">(gdb) print_rtx_function (stderr, cfun, true); +</pre></div> + +<p>and copy and paste the output into the body of the C function. +</p> +<p>Example DejaGnu tests of RTL can be seen in the source tree under +<samp>gcc/testsuite/gcc.dg/rtl</samp>. +</p> +<p>The <code>__RTL</code> parser is not integrated with the C tokenizer or +preprocessor, and works simply by reading the relevant lines within +the braces. In particular, the RTL body must be on separate lines from +the enclosing braces, and the preprocessor is not usable within it. +</p> + + + +</body> +</html> |