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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failure in WebAssemblyRegisterInfo::eliminateFrameIndex()"
href="https://bugs.llvm.org/show_bug.cgi?id=47944">47944</a>
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<tr>
<th>Summary</th>
<td>Assertion failure in WebAssemblyRegisterInfo::eliminateFrameIndex()
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>11.0
</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>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jjorge@quarkslab.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24091" name="attach_24091" title="Output of the crash">attachment 24091</a> <a href="attachment.cgi?id=24091&action=edit" title="Output of the crash">[details]</a></span>
Output of the crash
With clang compiled from the release/11.x branch, when compiling the reduced
test case below for the wasm32 target with
clang -target wasm32 -c test.ll -o /dev/null
Where test.ll is
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
@str = hidden local_unnamed_addr global [3 x i8] c"abc", align 16
define i8 @failing() {
0:
%1 = alloca i8, align 4
%2 = ptrtoint i8* %1 to i32
%3 = getelementptr [3 x i8], [3 x i8]* @str, i32 0, i32 %2
%4 = load i8, i8* %3, align 8
%5 = and i8 %4, 67
ret i8 %5
}
Clang fails with the following message:
llvm/include/llvm/CodeGen/MachineOperand.h:536: int64_t
llvm::MachineOperand::getImm() const: Assertion `isImm() && "Wrong
MachineOperand accessor"' failed.
The call to getImm() is done at line 105 of WebAssemblyRegisterInfo.
See the attached log for details.</pre>
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