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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion `MA && "Handed an instruction that MemorySSA doesn't recognize?"' failed. with -instcombine -globals-aa -early-cse-memssa"
href="https://bugs.llvm.org/show_bug.cgi?id=33756">33756</a>
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<th>Summary</th>
<td>Assertion `MA && "Handed an instruction that MemorySSA doesn't recognize?"' failed. with -instcombine -globals-aa -early-cse-memssa
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>mikael.holmen@ericsson.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18781" name="attach_18781" title="reproducer">attachment 18781</a> <a href="attachment.cgi?id=18781&action=edit" title="reproducer">[details]</a></span>
reproducer
opt -instcombine -globals-aa -early-cse-memssa -S -o - tr14022.ll
gives
opt: ../include/llvm/Transforms/Utils/MemorySSA.h:766: llvm::MemoryAccess*
llvm::MemorySSAWalker::getClobberingMemoryAccess(const llvm::Instruction*):
Assertion `MA && "Handed an instruction that MemorySSA doesn't recognize?"'
failed.
when running
[2017-07-12 10:51:50.717703492] 0x53b7e40 Executing Pass 'Early CSE w/
MemorySSA' on Function 'f3'...
The instruction that it crashes on is
(gdb) p I->dump()
%call2 = call i16 @f1()
and MSSA looks like
(gdb) p MSSA
$3 = (llvm::MemorySSA *) 0x5e2f850
(gdb) p MSSA->dump()
define void @f3() {
%call1 = call i16 @f1()
; 1 = MemoryDef(liveOnEntry)
call void @f2()
%call2 = call i16 @f1()
ret void
}</pre>
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