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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Hide some things from the debugger"
href="https://bugs.llvm.org/show_bug.cgi?id=49301">49301</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Hide some things from the debugger
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Support Libraries
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>clattner@nondot.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>LLVM has a bunch of stuff that relies on deep template instantiation, which
makes operating a debugger pretty annoying. The most egregious of which lately
is TypeSwitch, which is used in MLIR pretty extensively (you get one frame for
every type you switchon, and you can have dozens).
I have this hack in my tree which solves the problem for me, it seems that we
should add a macro for this in Support/Compiler.h. Is anyone opposed to that?
Hack to TypeSwitch.h:
/// Invoke a case on the derived class with multiple case types.
template <typename CaseT, typename CaseT2, typename... CaseTs,
typename CallableT>
__attribute__((__always_inline__,
__nodebug__)) // Hide from debugger.
DerivedT &
Case(CallableT &&caseFn) {
DerivedT &derived = static_cast<DerivedT &>(*this);
return derived.template Case<CaseT>(caseFn)
.template Case<CaseT2, CaseTs...>(caseFn);
}</pre>
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</p>
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