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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - We need fewer tools for scheduling post ra scheduler pass"
href="https://llvm.org/bugs/show_bug.cgi?id=30870">30870</a>
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<th>Summary</th>
<td>We need fewer tools for scheduling post ra scheduler pass
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Common Code Generator Code
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>amehsan@ca.ibm.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>I am aware of the following mechanisms for scheduling post ra schedulers.
1- The new virtual function in this patch
2- targetSchedulesPostRAScheduling
3- enablePostRA method in the subtarget
4- PostRAScheduler flag in include/llvm/Target/TargetSchedule.td
5- command line option to turn on new scheduler instead of old one.
6- command line option to turn off post ra schedulers
7- SubstitutePass to use new scheduler instead of old one.
Each of these seems to have a slightly different usecase. If there is a
likelihood that we can remove some of these, it might be worthwhile to open a
PR. otherwise we can leave it as is.
This is taken from D25482 (towards the end of conversation). I add some follow
up comments from there in the comments of this PR</pre>
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