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<title>GNU Compiler Collection (GCC) Internals: Dump types</title>
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<a name="Dump-types"></a>
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<p>
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Next: <a href="Dump-examples.html#Dump-examples" accesskey="n" rel="next">Dump examples</a>, Previous: <a href="Dump-output-verbosity.html#Dump-output-verbosity" accesskey="p" rel="prev">Dump output verbosity</a>, Up: <a href="Optimization-info.html#Optimization-info" accesskey="u" rel="up">Optimization info</a> [<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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<a name="Dump-types-1"></a>
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<h4 class="subsection">9.7.5 Dump types</h4>
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<a name="index-dump-types"></a>
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<dl compact="compact">
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<dt><code>dump_printf</code>
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<a name="index-dump_005fprintf"></a>
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</dt>
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<dd>
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<p>This is a generic method for doing formatted output. It takes an
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additional argument <code>dump_kind</code> which signifies the type of
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dump. This method outputs information only when the dumps are enabled
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for this particular <code>dump_kind</code>. Note that the caller doesn’t
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need to know if the particular dump is enabled or not, or even the
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file name. The caller only needs to decide which dump output
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information is relevant, and under what conditions. This determines
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the associated flags.
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</p>
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<p>Consider the following example from <samp>loop-unroll.c</samp> where an
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informative message about a loop (along with its location) is printed
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when any of the following flags is enabled
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</p><ul class="no-bullet">
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<li>- optimization messages
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</li><li>- RTL dumps
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</li><li>- detailed dumps
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</li></ul>
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<div class="example">
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<pre class="example">int report_flags = MSG_OPTIMIZED_LOCATIONS | TDF_RTL | TDF_DETAILS;
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dump_printf_loc (report_flags, locus,
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"loop turned into non-loop; it never loops.\n");
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</pre></div>
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</dd>
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<dt><code>dump_basic_block</code>
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<a name="index-dump_005fbasic_005fblock"></a>
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</dt>
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<dd><p>Output basic block.
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</p></dd>
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<dt><code>dump_generic_expr</code>
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<a name="index-dump_005fgeneric_005fexpr"></a>
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</dt>
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<dd><p>Output generic expression.
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</p></dd>
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<dt><code>dump_gimple_stmt</code>
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<a name="index-dump_005fgimple_005fstmt"></a>
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</dt>
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<dd><p>Output gimple statement.
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</p>
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<p>Note that the above methods also have variants prefixed with
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<code>_loc</code>, such as <code>dump_printf_loc</code>, which are similar except
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they also output the source location information.
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</p>
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</dd>
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</dl>
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