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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - wasm32-unknown-unknown-wasm target generated invalid code"
href="https://bugs.llvm.org/show_bug.cgi?id=34317">34317</a>
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<th>Summary</th>
<td>wasm32-unknown-unknown-wasm target generated invalid code
</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>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: WebAssembly
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>sbc@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>For the following C problems the wasm32-unknown-unknown-wasm generates invalid
wasm in that it includes an extra get_local which means that that type stack is
not empty when the function returns:
```
int main()
{
int c = 1;
asm(""::"r"(c));
return 0;
}
```
With wasm32-unknown-unknown-wasm:
000043 <main>:
000047: 41 01 | i32.const 1
000049: 21 00 | set_local 0
00004b: 20 00 | get_local 0
00004d: 41 00 | i32.const 0
00004f: 0b | end
With wasm32-unknown-unknown-elf:
000034 func[0]:
000038: 41 01 | i32.const 1
00003a: 21 00 | set_local 0
00003c: 41 00 | i32.const 0
00003e: 0b | end
The result of running the back code in wasm-interp is:
error: type stack at end of function is 1, expected 0
000004d: error: EndFunctionBody callback failed</pre>
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