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<title>Final Actions (GNU Compiler Collection (GCC) Internals)</title>

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<a name="Final-Actions"></a>
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<p>
Previous: <a href="Require-Support.html#Require-Support" accesskey="p" rel="prev">Require Support</a>, Up: <a href="Test-Directives.html#Test-Directives" accesskey="u" rel="up">Test Directives</a> &nbsp; [<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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<hr>
<a name="Commands-for-use-in-dg_002dfinal"></a>
<h4 class="subsection">7.2.6 Commands for use in <code>dg-final</code></h4>

<p>The GCC testsuite defines the following directives to be used within
<code>dg-final</code>.
</p>
<a name="Scan-a-particular-file"></a>
<h4 class="subsubsection">7.2.6.1 Scan a particular file</h4>

<dl compact="compact">
<dt><code>scan-file <var>filename</var> <var>regexp</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regexp</var> matches text in <var>filename</var>.
</p></dd>
<dt><code>scan-file-not <var>filename</var> <var>regexp</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regexp</var> does not match text in <var>filename</var>.
</p></dd>
<dt><code>scan-module <var>module</var> <var>regexp</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regexp</var> matches in Fortran module <var>module</var>.
</p></dd>
<dt><code>dg-check-dot <var>filename</var></code></dt>
<dd><p>Passes if <var>filename</var> is a valid <samp>.dot</samp> file (by running
<code>dot -Tpng</code> on it, and verifying the exit code is 0).
</p></dd>
</dl>

<a name="Scan-the-assembly-output"></a>
<h4 class="subsubsection">7.2.6.2 Scan the assembly output</h4>

<dl compact="compact">
<dt><code>scan-assembler <var>regex</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> matches text in the test&rsquo;s assembler output.
</p>
</dd>
<dt><code>scan-assembler-not <var>regex</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> does not match text in the test&rsquo;s assembler output.
</p>
</dd>
<dt><code>scan-assembler-times <var>regex</var> <var>num</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> is matched exactly <var>num</var> times in the test&rsquo;s
assembler output.
</p>
</dd>
<dt><code>scan-assembler-dem <var>regex</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> matches text in the test&rsquo;s demangled assembler output.
</p>
</dd>
<dt><code>scan-assembler-dem-not <var>regex</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> does not match text in the test&rsquo;s demangled assembler
output.
</p>
</dd>
<dt><code>scan-hidden <var>symbol</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>symbol</var> is defined as a hidden symbol in the test&rsquo;s
assembly output.
</p>
</dd>
<dt><code>scan-not-hidden <var>symbol</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>symbol</var> is not defined as a hidden symbol in the test&rsquo;s
assembly output.
</p>
</dd>
<dt><code>check-function-bodies <var>prefix</var> <var>terminator</var> [<var>options</var> [{ target/xfail <var>selector</var> }]]</code></dt>
<dd><p>Looks through the source file for comments that give the expected assembly
output for selected functions.  Each line of expected output starts with the
prefix string <var>prefix</var> and the expected output for a function as a whole
is followed by a line that starts with the string <var>terminator</var>.
Specifying an empty terminator is equivalent to specifying &lsquo;<samp>&quot;*/&quot;</samp>&rsquo;.
</p>
<p><var>options</var>, if specified, is a list of regular expressions, each of
which matches a full command-line option.  A non-empty list prevents
the test from running unless all of the given options are present on the
command line.  This can help if a source file is compiled both with
and without optimization, since it is rarely useful to check the full
function body for unoptimized code.
</p>
<p>The first line of the expected output for a function <var>fn</var> has the form:
</p>
<div class="smallexample">
<pre class="smallexample"><var>prefix</var> <var>fn</var>:  [{ target/xfail <var>selector</var> }]
</pre></div>

<p>Subsequent lines of the expected output also start with <var>prefix</var>.
In both cases, whitespace after <var>prefix</var> is not significant.
</p>
<p>The test discards assembly directives such as <code>.cfi_startproc</code>
and local label definitions such as <code>.LFB0</code> from the compiler&rsquo;s
assembly output.  It then matches the result against the expected
output for a function as a single regular expression.  This means that
later lines can use backslashes to refer back to &lsquo;<samp>(&hellip;)</samp>&rsquo;
captures on earlier lines.  For example:
</p>
<div class="smallexample">
<pre class="smallexample">/* { dg-final { check-function-bodies &quot;**&quot; &quot;&quot; &quot;-DCHECK_ASM&quot; } } */
&hellip;
/*
** add_w0_s8_m:
**	mov	(z[0-9]+\.b), w0
**	add	z0\.b, p0/m, z0\.b, \1
**	ret
*/
svint8_t add_w0_s8_m (&hellip;) { &hellip; }
&hellip;
/*
** add_b0_s8_m:
**	mov	(z[0-9]+\.b), b0
**	add	z1\.b, p0/m, z1\.b, \1
**	ret
*/
svint8_t add_b0_s8_m (&hellip;) { &hellip; }
</pre></div>

<p>checks whether the implementations of <code>add_w0_s8_m</code> and
<code>add_b0_s8_m</code> match the regular expressions given.  The test only
runs when &lsquo;<samp>-DCHECK_ASM</samp>&rsquo; is passed on the command line.
</p>
<p>It is possible to create non-capturing multi-line regular expression
groups of the form &lsquo;<samp>(<var>a</var>|<var>b</var>|&hellip;)</samp>&rsquo; by putting the
&lsquo;<samp>(</samp>&rsquo;, &lsquo;<samp>|</samp>&rsquo; and &lsquo;<samp>)</samp>&rsquo; on separate lines (each still using
<var>prefix</var>).  For example:
</p>
<div class="smallexample">
<pre class="smallexample">/*
** cmple_f16_tied:
** (
**	fcmge	p0\.h, p0/z, z1\.h, z0\.h
** |
**	fcmle	p0\.h, p0/z, z0\.h, z1\.h
** )
**	ret
*/
svbool_t cmple_f16_tied (&hellip;) { &hellip; }
</pre></div>

<p>checks whether <code>cmple_f16_tied</code> is implemented by the
<code>fcmge</code> instruction followed by <code>ret</code> or by the
<code>fcmle</code> instruction followed by <code>ret</code>.  The test is
still a single regular rexpression.
</p>
<p>A line containing just:
</p>
<div class="smallexample">
<pre class="smallexample"><var>prefix</var> ...
</pre></div>

<p>stands for zero or more unmatched lines; the whitespace after
<var>prefix</var> is again not significant.
</p>
</dd>
</dl>

<a name="Scan-optimization-dump-files"></a>
<h4 class="subsubsection">7.2.6.3 Scan optimization dump files</h4>

<p>These commands are available for <var>kind</var> of <code>tree</code>, <code>ltrans-tree</code>,
<code>offload-tree</code>, <code>rtl</code>, <code>offload-rtl</code>, <code>ipa</code>, and
<code>wpa-ipa</code>.
</p>
<dl compact="compact">
<dt><code>scan-<var>kind</var>-dump <var>regex</var> <var>suffix</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> matches text in the dump file with suffix <var>suffix</var>.
</p>
</dd>
<dt><code>scan-<var>kind</var>-dump-not <var>regex</var> <var>suffix</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> does not match text in the dump file with suffix
<var>suffix</var>.
</p>
</dd>
<dt><code>scan-<var>kind</var>-dump-times <var>regex</var> <var>num</var> <var>suffix</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> is found exactly <var>num</var> times in the dump file
with suffix <var>suffix</var>.
</p>
</dd>
<dt><code>scan-<var>kind</var>-dump-dem <var>regex</var> <var>suffix</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> matches demangled text in the dump file with
suffix <var>suffix</var>.
</p>
</dd>
<dt><code>scan-<var>kind</var>-dump-dem-not <var>regex</var> <var>suffix</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if <var>regex</var> does not match demangled text in the dump file with
suffix <var>suffix</var>.
</p></dd>
</dl>

<a name="Check-for-output-files"></a>
<h4 class="subsubsection">7.2.6.4 Check for output files</h4>

<dl compact="compact">
<dt><code>output-exists [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if compiler output file exists.
</p>
</dd>
<dt><code>output-exists-not [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if compiler output file does not exist.
</p>
</dd>
<dt><code>scan-symbol <var>regexp</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if the pattern is present in the final executable.
</p>
</dd>
<dt><code>scan-symbol-not <var>regexp</var> [{ target/xfail <var>selector</var> }]</code></dt>
<dd><p>Passes if the pattern is absent from the final executable.
</p></dd>
</dl>

<a name="Checks-for-gcov-tests"></a>
<h4 class="subsubsection">7.2.6.5 Checks for <code>gcov</code> tests</h4>

<dl compact="compact">
<dt><code>run-gcov <var>sourcefile</var></code></dt>
<dd><p>Check line counts in <code>gcov</code> tests.
</p>
</dd>
<dt><code>run-gcov [branches] [calls] { <var>opts</var> <var>sourcefile</var> }</code></dt>
<dd><p>Check branch and/or call counts, in addition to line counts, in
<code>gcov</code> tests.
</p></dd>
</dl>

<a name="Clean-up-generated-test-files"></a>
<h4 class="subsubsection">7.2.6.6 Clean up generated test files</h4>

<p>Usually the test-framework removes files that were generated during
testing. If a testcase, for example, uses any dumping mechanism to
inspect a passes dump file, the testsuite recognized the dump option
passed to the tool and schedules a final cleanup to remove these files.
</p>
<p>There are, however, following additional cleanup directives that can be
used to annotate a testcase &quot;manually&quot;.
</p><dl compact="compact">
<dt><code>cleanup-coverage-files</code></dt>
<dd><p>Removes coverage data files generated for this test.
</p>
</dd>
<dt><code>cleanup-modules &quot;<var>list-of-extra-modules</var>&quot;</code></dt>
<dd><p>Removes Fortran module files generated for this test, excluding the
module names listed in keep-modules.
Cleaning up module files is usually done automatically by the testsuite
by looking at the source files and removing the modules after the test
has been executed.
</p><div class="smallexample">
<pre class="smallexample">module MoD1
end module MoD1
module Mod2
end module Mod2
module moD3
end module moD3
module mod4
end module mod4
! { dg-final { cleanup-modules &quot;mod1 mod2&quot; } } ! redundant
! { dg-final { keep-modules &quot;mod3 mod4&quot; } }
</pre></div>

</dd>
<dt><code>keep-modules &quot;<var>list-of-modules-not-to-delete</var>&quot;</code></dt>
<dd><p>Whitespace separated list of module names that should not be deleted by
cleanup-modules.
If the list of modules is empty, all modules defined in this file are kept.
</p><div class="smallexample">
<pre class="smallexample">module maybe_unneeded
end module maybe_unneeded
module keep1
end module keep1
module keep2
end module keep2
! { dg-final { keep-modules &quot;keep1 keep2&quot; } } ! just keep these two
! { dg-final { keep-modules &quot;&quot; } } ! keep all
</pre></div>

</dd>
<dt><code>dg-keep-saved-temps &quot;<var>list-of-suffixes-not-to-delete</var>&quot;</code></dt>
<dd><p>Whitespace separated list of suffixes that should not be deleted
automatically in a testcase that uses <samp>-save-temps</samp>.
</p><div class="smallexample">
<pre class="smallexample">// { dg-options &quot;-save-temps -fpch-preprocess -I.&quot; }
int main() { return 0; }
// { dg-keep-saved-temps &quot;.s&quot; } ! just keep assembler file
// { dg-keep-saved-temps &quot;.s&quot; &quot;.i&quot; } ! ... and .i
// { dg-keep-saved-temps &quot;.ii&quot; &quot;.o&quot; } ! or just .ii and .o
</pre></div>

</dd>
<dt><code>cleanup-profile-file</code></dt>
<dd><p>Removes profiling files generated for this test.
</p>
</dd>
</dl>

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