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  67. <a name="Dump-examples-1"></a>
  68. <h4 class="subsection">9.7.6 Dump examples</h4>
  69. <a name="index-dump-examples"></a>
  70. <div class="smallexample">
  71. <pre class="smallexample">gcc -O3 -fopt-info-missed=missed.all
  72. </pre></div>
  73. <p>outputs missed optimization report from all the passes into
  74. <samp>missed.all</samp>.
  75. </p>
  76. <p>As another example,
  77. </p><div class="smallexample">
  78. <pre class="smallexample">gcc -O3 -fopt-info-inline-optimized-missed=inline.txt
  79. </pre></div>
  80. <p>will output information about missed optimizations as well as
  81. optimized locations from all the inlining passes into
  82. <samp>inline.txt</samp>.
  83. </p>
  84. <p>If the <var>filename</var> is provided, then the dumps from all the
  85. applicable optimizations are concatenated into the <samp>filename</samp>.
  86. Otherwise the dump is output onto <samp>stderr</samp>. If <var>options</var> is
  87. omitted, it defaults to <samp>optimized-optall</samp>, which means dump
  88. all information about successful optimizations from all the passes.
  89. In the following example, the optimization information is output on
  90. to <samp>stderr</samp>.
  91. </p>
  92. <div class="smallexample">
  93. <pre class="smallexample">gcc -O3 -fopt-info
  94. </pre></div>
  95. <p>Note that <samp>-fopt-info-vec-missed</samp> behaves the same as
  96. <samp>-fopt-info-missed-vec</samp>. The order of the optimization group
  97. names and message types listed after <samp>-fopt-info</samp> does not matter.
  98. </p>
  99. <p>As another example, consider
  100. </p>
  101. <div class="smallexample">
  102. <pre class="smallexample">gcc -fopt-info-vec-missed=vec.miss -fopt-info-loop-optimized=loop.opt
  103. </pre></div>
  104. <p>Here the two output file names <samp>vec.miss</samp> and <samp>loop.opt</samp> are
  105. in conflict since only one output file is allowed. In this case, only
  106. the first option takes effect and the subsequent options are
  107. ignored. Thus only the <samp>vec.miss</samp> is produced which containts
  108. dumps from the vectorizer about missed opportunities.
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