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101 lines
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<title>Current structure hierarchy - GNU Compiler Collection (GCC) Internals</title>
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<a name="Current-structure-hierarchy"></a>
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Next: <a rel="next" accesskey="n" href="Adding-new-DECL-node-types.html#Adding-new-DECL-node-types">Adding new DECL node types</a>,
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Up: <a rel="up" accesskey="u" href="Internal-structure.html#Internal-structure">Internal structure</a>
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<h5 class="subsubsection">10.4.2.1 Current structure hierarchy</h5>
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<dl>
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<dt><code>struct tree_decl_minimal</code><dd>This is the minimal structure to inherit from in order for common
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<code>DECL</code> macros to work. The fields it contains are a unique ID,
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source location, context, and name.
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<br><dt><code>struct tree_decl_common</code><dd>This structure inherits from <code>struct tree_decl_minimal</code>. It
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contains fields that most <code>DECL</code> nodes need, such as a field to
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store alignment, machine mode, size, and attributes.
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<br><dt><code>struct tree_field_decl</code><dd>This structure inherits from <code>struct tree_decl_common</code>. It is
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used to represent <code>FIELD_DECL</code>.
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<br><dt><code>struct tree_label_decl</code><dd>This structure inherits from <code>struct tree_decl_common</code>. It is
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used to represent <code>LABEL_DECL</code>.
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<br><dt><code>struct tree_translation_unit_decl</code><dd>This structure inherits from <code>struct tree_decl_common</code>. It is
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used to represent <code>TRANSLATION_UNIT_DECL</code>.
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<br><dt><code>struct tree_decl_with_rtl</code><dd>This structure inherits from <code>struct tree_decl_common</code>. It
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contains a field to store the low-level RTL associated with a
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<code>DECL</code> node.
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<br><dt><code>struct tree_result_decl</code><dd>This structure inherits from <code>struct tree_decl_with_rtl</code>. It is
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used to represent <code>RESULT_DECL</code>.
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<br><dt><code>struct tree_const_decl</code><dd>This structure inherits from <code>struct tree_decl_with_rtl</code>. It is
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used to represent <code>CONST_DECL</code>.
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<br><dt><code>struct tree_parm_decl</code><dd>This structure inherits from <code>struct tree_decl_with_rtl</code>. It is
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used to represent <code>PARM_DECL</code>.
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<br><dt><code>struct tree_decl_with_vis</code><dd>This structure inherits from <code>struct tree_decl_with_rtl</code>. It
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contains fields necessary to store visibility information, as well as
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a section name and assembler name.
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<br><dt><code>struct tree_var_decl</code><dd>This structure inherits from <code>struct tree_decl_with_vis</code>. It is
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used to represent <code>VAR_DECL</code>.
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<br><dt><code>struct tree_function_decl</code><dd>This structure inherits from <code>struct tree_decl_with_vis</code>. It is
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used to represent <code>FUNCTION_DECL</code>.
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</dl>
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