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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion `BB->getTerminator()->getNumSuccessors() == 1 && "Should have a single succ!"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=42544">42544</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion `BB->getTerminator()->getNumSuccessors() == 1 && "Should have a single succ!"' 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>
<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>Transformation Utilities
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>peter@pcc.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>With the following test case (reduced from an LTO build of the Linux kernel) I
get:
$ cat fair.i
enum {
a,
b
}
# 1 "" 3
c() {
asm goto("" : : : : d);
asm("");
return a;
d:
return b;
}
ag;
e(f) {
ag &&f;
_Bool am = c();
e(am);
}
$ clang -flto -O2 -c -o fair.o fair.i -fno-optimize-sibling-calls
$ ld.lld -r -o vmlinux.o fair.o
ld.lld: [...]/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp:348:
llvm::BasicBlock *llvm::SplitEdge(llvm::BasicBlock *, llvm::BasicBlock *,
llvm::DominatorTree *, llvm::LoopInfo *, llvm::MemorySSAUpdater *): Assertion
`BB->getTerminator()->getNumSuccessors() == 1 && "Should have a single succ!"'
failed.</pre>
</div>
</p>
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