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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 32-bit sparc backend fails to allocate by-value returns of 256 bytes"
href="https://bugs.llvm.org/show_bug.cgi?id=48698">48698</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>32-bit sparc backend fails to allocate by-value returns of 256 bytes
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: Sparc
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>simonas+llvm.org@kazlauskas.me
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Code
define i256 @test() unnamed_addr {
start:
ret i256 0
}
built with `llc -mtriple=sparc` will fail with the following assertion:
LLVM ERROR: unable to allocate function return #6
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/llc -o
./output.s -mtriple=sparc <source>
1. Running pass 'Function Pass Manager' on module '<source>'.
2. Running pass 'SPARC DAG->DAG Pattern Instruction Selection' on function
'@test'
<snip>
#7 0x0000558c147c69b6
llvm::CCState::AnalyzeReturn(llvm::SmallVectorImpl<llvm::ISD::OutputArg>
const&, bool (*)(unsigned int, llvm::MVT, llvm::MVT,
llvm::CCValAssign::LocInfo, llvm::ISD::ArgFlagsTy, llvm::CCState&))
(/opt/compiler-explorer/clang-trunk/bin/llc+0x1b7e9b6)
#8 0x0000558c13f8c16d llvm::SparcTargetLowering::LowerReturn_32(llvm::SDValue,
unsigned int, bool, llvm::SmallVectorImpl<llvm::ISD::OutputArg> const&,
llvm::SmallVectorImpl<llvm::SDValue> const&, llvm::SDLoc const&,
llvm::SelectionDAG&) const
(/opt/compiler-explorer/clang-trunk/bin/llc+0x134416d)
#9 0x0000558c151c77cb llvm::SelectionDAGBuilder::visitRet(llvm::ReturnInst
const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x257f7cb)
#10 0x0000558c151ec4fc llvm::SelectionDAGBuilder::visit(llvm::Instruction
const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x25a44fc)
<snip>
Compiler returned: 255
Possibly related to <a class="bz_bug_link
bz_status_NEW "
title="NEW - Lowering long vector returns fails."
href="show_bug.cgi?id=27161">bug 27161</a></pre>
</div>
</p>
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