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| <a name="Dump-examples-1"></a> |
| <h4 class="subsection">9.7.6 Dump examples</h4> |
| <a name="index-dump-examples"></a> |
| |
| <div class="smallexample"> |
| <pre class="smallexample">gcc -O3 -fopt-info-missed=missed.all |
| </pre></div> |
| |
| <p>outputs missed optimization report from all the passes into |
| <samp>missed.all</samp>. |
| </p> |
| <p>As another example, |
| </p><div class="smallexample"> |
| <pre class="smallexample">gcc -O3 -fopt-info-inline-optimized-missed=inline.txt |
| </pre></div> |
| |
| <p>will output information about missed optimizations as well as |
| optimized locations from all the inlining passes into |
| <samp>inline.txt</samp>. |
| </p> |
| <p>If the <var>filename</var> is provided, then the dumps from all the |
| applicable optimizations are concatenated into the <samp>filename</samp>. |
| Otherwise the dump is output onto <samp>stderr</samp>. If <var>options</var> is |
| omitted, it defaults to <samp>all-all</samp>, which means dump all |
| available optimization info from all the passes. In the following |
| example, all optimization info is output on to <samp>stderr</samp>. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">gcc -O3 -fopt-info |
| </pre></div> |
| |
| <p>Note that <samp>-fopt-info-vec-missed</samp> behaves the same as |
| <samp>-fopt-info-missed-vec</samp>. |
| </p> |
| <p>As another example, consider |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">gcc -fopt-info-vec-missed=vec.miss -fopt-info-loop-optimized=loop.opt |
| </pre></div> |
| |
| <p>Here the two output file names <samp>vec.miss</samp> and <samp>loop.opt</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>vec.miss</samp> is produced which containts |
| dumps from the vectorizer about missed opportunities. |
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