<html>
<head>
<base href="https://bugs.llvm.org/">
</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 - LTO build gives assertion"
href="https://bugs.llvm.org/show_bug.cgi?id=38120">38120</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>LTO build gives assertion
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>ftee@flametop.co.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>eleviant@accesssoftek.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Change 'r336059 - [Evaluator] Improve evaluation of call instruction' appears
to have introduced a compiler assertion when compiling this example code.
NB. This code sample is technically invalid C++ as it breaks the one definition
rules, but it used to compile benignly before the change.
$ cat a.cpp
class dYj typedef *(*vfY)(class lYY *);
struct Mxl {
Mxl(vfY, int, const char *, int, const char *, const char *, const char *,
bool);
vfY AvQ;
};
Mxl::Mxl(vfY, int, const char *, int, const char *, const char *, const char *,
bool) {}
$ cat b.cpp
class dYj;
struct Mxl {
Mxl(dYj *(class lYY *), int, const char *, int, const char *, const char *,
const char *, bool = true);
} a(0, 0, 0, 0, 0, 0, 0);
$ clang++ -c a.cpp -o a.cpp.o -flto
$ clang++ -c b.cpp -o b.cpp.o -flto
$ llvm-lto a.cpp.o b.cpp.o
gives the assertion:
llvm-lto: Casting.h:255: typename llvm::cast_retty<X,Y*>::ret_type
llvm::cast(Y*) [with X = llvm::Function; Y = llvm::Constant; typename
llvm::cast_retty<X, Y*>::ret_type = llvm::Function*]:
Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
It would seem better if the compiler could give an error in this case rather
than aborting with an assertion.</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>