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130 lines
4.6 KiB
HTML
130 lines
4.6 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2018 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>GIMPLE Tests (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="GIMPLE Tests (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="GIMPLE Tests (GNU Compiler Collection (GCC) Internals)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Testsuites.html#Testsuites" rel="up" title="Testsuites">
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<link href="RTL-Tests.html#RTL-Tests" rel="next" title="RTL Tests">
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<link href="Torture-Tests.html#Torture-Tests" rel="prev" title="Torture Tests">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="GIMPLE-Tests"></a>
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<div class="header">
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<p>
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Next: <a href="RTL-Tests.html#RTL-Tests" accesskey="n" rel="next">RTL Tests</a>, Previous: <a href="Torture-Tests.html#Torture-Tests" accesskey="p" rel="prev">Torture 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>
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</div>
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<hr>
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<a name="Support-for-testing-GIMPLE-passes"></a>
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<h3 class="section">7.10 Support for testing GIMPLE passes</h3>
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<p>As of gcc 7, C functions can be tagged with <code>__GIMPLE</code> to indicate
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that the function body will be GIMPLE, rather than C. The compiler requires
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the option <samp>-fgimple</samp> to enable this functionality. For example:
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</p>
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<div class="smallexample">
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<pre class="smallexample">/* { dg-do compile } */
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/* { dg-options "-O -fgimple" } */
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void __GIMPLE (startwith ("dse2")) foo ()
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{
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int a;
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bb_2:
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if (a > 4)
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goto bb_3;
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else
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goto bb_4;
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bb_3:
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a_2 = 10;
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goto bb_5;
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bb_4:
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a_3 = 20;
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bb_5:
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a_1 = __PHI (bb_3: a_2, bb_4: a_3);
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a_4 = a_1 + 4;
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return;
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}
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</pre></div>
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<p>The <code>startwith</code> argument indicates at which pass to begin.
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</p>
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<p>Use the dump modifier <code>-gimple</code> (e.g. <samp>-fdump-tree-all-gimple</samp>)
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to make tree dumps more closely follow the format accepted by the GIMPLE
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parser.
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</p>
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<p>Example DejaGnu tests of GIMPLE can be seen in the source tree at
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<samp>gcc/testsuite/gcc.dg/gimplefe-*.c</samp>.
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</p>
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<p>The <code>__GIMPLE</code> parser is integrated with the C tokenizer and
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preprocessor, so it should be possible to use macros to build out
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test coverage.
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</p>
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</body>
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</html>
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