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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 - [ConstFold] Assertion failure folding llvm.vector.reduce on bitcast"
href="https://bugs.llvm.org/show_bug.cgi?id=51811">51811</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[ConstFold] Assertion failure folding llvm.vector.reduce on bitcast
</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>
<tr>
<th>OS</th>
<td>Linux
</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>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nikita.ppv@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Blocks</th>
<td>51236
</td>
</tr></table>
<p>
<div>
<pre>; RUN: opt -S -instsimplify < %s
define i8 @test() {
%r = call i8 @llvm.vector.reduce.mul.v16i8(<16 x i8> bitcast (<1 x i128>
<i128 20011376718272490338853433276725592320> to <16 x i8>))
ret i8 %r
}
declare i8 @llvm.vector.reduce.mul.v16i8(<16 x i8>)
opt: /home/nikic/llvm-project/llvm/include/llvm/Support/Casting.h:104: static
bool llvm::isa_impl_cl<To, const From*>::doit(const From*) [with To =
llvm::PoisonValue; From = llvm::Constant]: Assertion `Val && "isa<> used on a
null pointer"' failed.
[...]
#9 0x0000564c89438b9d llvm::Constant::containsPoisonElement() const
(build/bin/opt+0x28bfb9d)
#10 0x0000564c88b69eaa (anonymous
namespace)::ConstantFoldScalarCall1(llvm::StringRef, unsigned int, llvm::Type*,
llvm::ArrayRef<llvm::Constant*>, llvm::TargetLibraryInfo const*, llvm::CallBase
const*) ConstantFolding.cpp:0:0
containsPoisonElement() does not account for the possibility of constant
expressions, in which case getAggregateElement() may return null.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta] 13.0.0 Release Blockers"
href="https://bugs.llvm.org/show_bug.cgi?id=51236">Bug 51236</a>] [meta] 13.0.0 Release Blockers
</li>
</ul>
</div>
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