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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Infinite loop in DSE with infinite loop"
href="https://llvm.org/bugs/show_bug.cgi?id=28014">28014</a>
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</tr>
<tr>
<th>Summary</th>
<td>Infinite loop in DSE with infinite loop
</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>Windows NT
</td>
</tr>
<tr>
<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>eli.friedman@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Testcase:
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @f(i32* nocapture %x, i32* noalias %y) {
entry:
%0 = bitcast i32* %x to i8*
br label %while.body
while.body:
tail call void @free(i8* %0) #2
store volatile i32 10, i32* %y, align 4
br label %z
z:
br label %while.body
}
; Function Attrs: nounwind
declare void @free(i8* nocapture)
Hangs opt -dse. Fun. (Artificial; not sure if you can get into this situation
with the default pass pipeline.)</pre>
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</p>
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