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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 --- - optnone causes CodeGen crash on ARM" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23684&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=X7ITrzMnRMuqvBvkkr-FfZ9Rkym7RBDxjZtswBDsiIs&s=jA3V-7H0RaIavZPplRGh21BZoY1oZeHorFc5sizevRU&e=">23684</a>
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<th>Summary</th>
<td>optnone causes CodeGen crash on ARM
</td>
</tr>
<tr>
<th>Product</th>
<td>tools
</td>
</tr>
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<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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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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>llc
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>mail+llvm@tzik.jp
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14399" name="attach_14399" title="crash log">attachment 14399</a> <a href="attachment.cgi?id=14399&action=edit" title="crash log">[details]</a></span>
crash log
On LLVM r238172 and Clang r238166, following code causes clang crash:
$ clang -fPIC -target arm-linux-gnueabi -O1 -x c -o /dev/null - 2>>
crash-log.txt <<EOF
int i = 0;
void g(int* x) {
*x = 0;
}
__attribute__((optnone))
void f() {
g(&i);
}
EOF
And in IR, this also causes crash:
$ clang -fPIC -target arm-linux-gnueabi -O1 -x ir -o /dev/null - 2>>
crash-log.txt <<EOF
target triple = "armv4t--linux-gnueabi"
@i = global i32 0, align 4
define void @g(i32* %x) {
store i32 0, i32* %x, align 4
ret void
}
define void @f() noinline optnone {
call void @g(i32* @i)
ret void
}
EOF</pre>
</div>
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