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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Warnings do not consider __builtin_assume"
href="https://bugs.llvm.org/show_bug.cgi?id=41641">41641</a>
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<th>Summary</th>
<td>Warnings do not consider __builtin_assume
</td>
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<th>Product</th>
<td>clang
</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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</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
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<th>Reporter</th>
<td>david@doublewise.net
</td>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>The following code emits: <source>:9:1: warning: control may reach end of
non-void function [-Wreturn-type]
int f(unsigned x) {
__builtin_assume(x <= 1);
switch (x) {
case 0:
return 0;
case 1:
return 1;
}
}
<a href="https://godbolt.org/z/rJGpzJ">https://godbolt.org/z/rJGpzJ</a>
I'm not sure how feasible fixing this would be, but I would like to be able to
have behavior similar to switching over an enum when I know the range of the
integer is limited.</pre>
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