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<h4 class="subsection">9.7.6 Dump examples</h4>
<p><a name="index-dump-examples-1711"></a>
<pre class="smallexample"> gcc -O3 -fopt-info-missed=missed.all
</pre>
<p>outputs missed optimization report from all the passes into
<samp><span class="file">missed.all</span></samp>.
<p>As another example,
<pre class="smallexample"> gcc -O3 -fopt-info-inline-optimized-missed=inline.txt
</pre>
<p>will output information about missed optimizations as well as
optimized locations from all the inlining passes into
<samp><span class="file">inline.txt</span></samp>.
<p>If the <var>filename</var> is provided, then the dumps from all the
applicable optimizations are concatenated into the <samp><span class="file">filename</span></samp>.
Otherwise the dump is output onto <samp><span class="file">stderr</span></samp>. If <var>options</var> is
omitted, it defaults to <samp><span class="option">all-all</span></samp>, which means dump all
available optimization info from all the passes. In the following
example, all optimization info is output on to <samp><span class="file">stderr</span></samp>.
<pre class="smallexample"> gcc -O3 -fopt-info
</pre>
<p>Note that <samp><span class="option">-fopt-info-vec-missed</span></samp> behaves the same as
<samp><span class="option">-fopt-info-missed-vec</span></samp>.
<p>As another example, consider
<pre class="smallexample"> gcc -fopt-info-vec-missed=vec.miss -fopt-info-loop-optimized=loop.opt
</pre>
<p>Here the two output file names <samp><span class="file">vec.miss</span></samp> and <samp><span class="file">loop.opt</span></samp> are
in conflict since only one output file is allowed. In this case, only
the first option takes effect and the subsequent options are
ignored. Thus only the <samp><span class="file">vec.miss</span></samp> is produced which containts
dumps from the vectorizer about missed opportunities.
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