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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CostModel] Assertion "Vector argument does not match VF" failed."
href="https://bugs.llvm.org/show_bug.cgi?id=49100">49100</a>
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<th>Summary</th>
<td>[CostModel] Assertion "Vector argument does not match VF" failed.
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.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=24498" name="attach_24498" title="reduced testcase">attachment 24498</a> <a href="attachment.cgi?id=24498&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
502a67d "[CostModel] Remove VF from IntrinsicCostAttributes" seems to be
causing the SystemZ build of the test-suite to fail
(SingleSource/UnitTests/matrix-types-spec.cpp).
getUserCost() is called with the instruction
%i6 = tail call <275 x double>
@llvm.matrix.multiply.v275f64.v475f64.v209f64(<475 x double> %i2, <209 x
double> undef, i32 25, i32 19, i32 11)
The return type is <275 x double>, but the argument type is <475 x double>. The
assertion in getOperandsScalarizationOverhead() is using VF==275, which is the
VF of the return type which does not match that of the argument...
opt -mtriple=s390x-linux-gnu -mcpu=z10 -O3 tc.ll -S -o -
llvm-project/llvm/include/llvm/CodeGen/BasicTTIImpl.h:630: unsigned int
llvm::BasicTTIImplBase<T>::getOperandsScalarizationOverhead(llvm::ArrayRef<const
llvm::Value*>, unsigned int) [with T = llvm::SystemZTTIImpl]: Asser
tion `(VF == 1 || VF == cast<FixedVectorType>(VecTy)->getNumElements()) &&
"Vector argument does not match VF"' failed.
#8 0x000000000210124a
llvm::BasicTTIImplBase<llvm::SystemZTTIImpl>::getOperandsScalarizationOverhead
#26 0x0000000003261fca llvm::InlinerPass::run</pre>
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