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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [TableGen] Default template argument does not have the same behavior as passing the same argument explicitly"
href="http://llvm.org/bugs/show_bug.cgi?id=18676">18676</a>
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<th>Summary</th>
<td>[TableGen] Default template argument does not have the same behavior as passing the same argument explicitly
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>qcolombet@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11980" name="attach_11980" title="File to reproduce the error">attachment 11980</a> <a href="attachment.cgi?id=11980&action=edit" title="File to reproduce the error">[details]</a></span>
File to reproduce the error
I have attached two td files:
- ko.td uses the default initializer of an argument of a template.
- ok.td specifies the same argument via an explicit value (which is the same as
the default one).
llvm-tblgen <ok|ko>.td -gen-subtarget -I <llvmsrc>/include/
* RESULTS
ko.td:
ko.td:44:1: error: Record `Testrm', field `SchedRW' list is not entirely
DefInit!
defm Test : SS48I_binop_rm;
^
ko.td:40:3: note: instantiated from multiclass
def rm : Instruction, Sched<[itins.Sched.Folded]>;
ok.td:
Works!
The only difference between ok.td and ko.td is:
$ diff ok.td ko.td
44c44
< defm Test : SS48I_binop_rm<SSE_ALU_F32S>;
---
<span class="quote">> defm Test : SS48I_binop_rm;</span >
I would expect both files to produce the same output since SS48I_binop_rm
specifies the default argument like this:
multiclass SS48I_binop_rm<OpndItins itins = SSE_ALU_F32S> {
* NOTES
If I replace itins.Sched.Folded by itins.Sched (i.e., one less indirection), it
works for ko.td too.</pre>
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