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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ParseAssemblyString does not resolve types already present in module"
href="http://llvm.org/bugs/show_bug.cgi?id=21058">21058</a>
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<th>Summary</th>
<td>ParseAssemblyString does not resolve types already present in module
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM assembly language parser
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jan+llvm-bugzilla@sheijk.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13085" name="attach_13085" title="Repro case">attachment 13085</a> <a href="attachment.cgi?id=13085&action=edit" title="Repro case">[details]</a></span>
Repro case
Reproduction steps:
- create a new LLVM module
- define a new named struct type foo_t (either using
- call ParseAssemblyString passing it the existing module and a source string
that uses one of the types added before
Or compile the attached file and run it w/o arguments to use
ParseAssemblyString to define the type or with --api-type to create foo_t using
the C++ API.
Expected:
Functions in the textural LLVM IR passed to ParseAssemblyString will use the
type struct.foo_t which is already defined in the module.
What happens:
Whenever this new code references struct.foo_t the parser creates a new opaque
struct type struct.foo_t.0 and uses that instead of struct.foo_t. This looks
like the same behaviour as when creating a new struct type with a name that is
already used.
The parser in lib/AsmParser/LLParser.cpp seems to look up named structs in it's
member NamedTypes in function ParseType. NamedTypes gets polulated when new
types get defined in ParseNamedType but I don't see it getting filled with the
existing types of the module. So ParseType will create a new opaque type that
gets renamed due to the naming conflict. I think this could easily be solved by
looking up the named type in the module (LLParser::M) inside ParseType using
Module::getTypeByName.</pre>
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