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| <a name="Dump-setup-1"></a> |
| <h4 class="subsection">9.7.1 Dump setup</h4> |
| <a name="index-dump-setup"></a> |
| |
| <p>A dump_manager class is defined in <samp>dumpfile.h</samp>. Various passes |
| register dumping pass-specific information via <code>dump_register</code> in |
| <samp>passes.c</samp>. During the registration, an optimization pass can |
| select its optimization group (see <a href="Optimization-groups.html#Optimization-groups">Optimization groups</a>). After |
| that optimization information corresponding to the entire group |
| (presumably from multiple passes) can be output via command-line |
| switches. Note that if a pass does not fit into any of the pre-defined |
| groups, it can select <code>OPTGROUP_NONE</code>. |
| </p> |
| <p>Note that in general, a pass need not know its dump output file name, |
| whether certain flags are enabled, etc. However, for legacy reasons, |
| passes could also call <code>dump_begin</code> which returns a stream in |
| case the particular pass has optimization dumps enabled. A pass could |
| call <code>dump_end</code> when the dump has ended. These methods should go |
| away once all the passes are converted to use the new dump |
| infrastructure. |
| </p> |
| <p>The recommended way to setup the dump output is via <code>dump_start</code> |
| and <code>dump_end</code>. |
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