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