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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang should support 'no_caller_saved_registers' attribute"
href="https://llvm.org/bugs/show_bug.cgi?id=26370">26370</a>
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<th>Summary</th>
<td>Clang should support 'no_caller_saved_registers' attribute
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</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>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>hjl.tools@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>The current interrupt spec has
To be feature complete, compiler should implement the optional
'no_caller_saved_registers' attribute:
Use this attribute to indicate that the specified function has no
caller-saved registers. That is, all registers are callee-saved.
The compiler generates proper function entry and exit sequences to
save and restore any modified registers.
The user can call functions specified with 'no_caller_saved_registers'
attribute from an interrupt handler without saving and restoring all
call clobbered registers.
llvm/clang should implement it.</pre>
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