<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - isa<> used on a null pointer in CodeGenPrepare::dupRetToEnableTailCallOpts"
href="https://llvm.org/bugs/show_bug.cgi?id=25764">25764</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>isa<> used on a null pointer in CodeGenPrepare::dupRetToEnableTailCallOpts
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>yaron.keren@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>benny.kra@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15407" name="attach_15407" title="creduced example">attachment 15407</a> <a href="attachment.cgi?id=15407&action=edit" title="creduced example">[details]</a></span>
creduced example
compiling
#include <list>
#include <vector>
using namespace std;
int main() {
list<int> c1;
vector<list<int>> cc;
cc.insert(cc.begin(), {c1});
}
with
<span class="quote">>clang -O -g -target x86_64-pc-windows -fexceptions lexicomp1.cpp</span >
results in Assertion failed: Val && "isa<> used on a null pointer" originating
from the dyn_cast
bool CodeGenPrepare::dupRetToEnableTailCallOpts(BasicBlock *BB) {
if (!TLI)
return false;
ReturnInst *RI = dyn_cast<ReturnInst>(BB->getTerminator());
where BB->getTerminator() is nullptr.
This could be fixed with dyn_cast_or_null but I don't know if this is correct
or if a nullptr BB->getTerminator() indicates a real problem which should be
fixed elsewhere.
Also attached is reduced example, as far as creduce could go (77 lines, no
external includes) if it is any help.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>