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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Assert failure in Combine redundant instructions pass."
href="http://llvm.org/bugs/show_bug.cgi?id=20113">20113</a>
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<th>Summary</th>
<td>Assert failure in Combine redundant instructions pass.
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kevinqindev@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$cat test.ll
define <4 x i32> @func(<4 x i16> %a, <4 x i16> %b) #0 {
%vmovl.i.i726 = zext <4 x i16> %a to <4 x i32>
%vmovl.i.i712 = zext <4 x i16> %b to <4 x i32>
%mul.i703 = mul <4 x i32> %vmovl.i.i712, %vmovl.i.i726
%tmp = icmp sge <4 x i32> %mul.i703, zeroinitializer
%vcgez.i = sext <4 x i1> %tmp to <4 x i32>
ret <4 x i32> %vcgez.i
}
$opt -O3 <test.ll
opt:
/home/kevin/llvm_trunk/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp:2047:
llvm::Instruction* ProcessUMulZExtIdiom(llvm::ICmpInst&, llvm::Value*,
llvm::Value*, llvm::InstCombiner&): Assertion
`isa<IntegerType>(MulVal->getType())' failed.
Highly suspect this is caused by below commit:
r206137 - Recognize test for overflow in integer multiplication.
If revert this commit, test can pass.</pre>
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