<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 - clang crashes in 'Codegen Prepare' with '-c -O2'"
href="https://bugs.llvm.org/show_bug.cgi?id=35266">35266</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang crashes in 'Codegen Prepare' with '-c -O2'
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</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>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>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sunil_srivastava@playstation.sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=19394" name="attach_19394" title="C++ Source">attachment 19394</a> <a href="attachment.cgi?id=19394&action=edit" title="C++ Source">[details]</a></span>
C++ Source
clang, crashes in 'Codegen Prepare' with '-c -O2'. The reproduction here is on
x86_64-unknown-gnu r314794, but was originally found with x86_64-scei-ps4.
The crash started since r314794, but exists in current trunk as well.
Attaching dump info. Source is:
int bar(int v);
struct T {
unsigned char f;
};
struct U {
unsigned long q;
struct T *d;
};
struct H {
struct U *p;
};
struct S {
union {
unsigned long fc;
struct {
int i;
int j;
} a;
struct {
int i;
int j;
} b;
} u;
};
void foo(struct H *h, struct S *s) {
struct U *u;
u = h->p;
int m = 0;
if (u->d) {
if (s)
m = s->u.a.j;
}
m = bar(m);
if (u->d) {
s->u.a.j = m;
s->u.a.i = 0x01;
} else {
s->u.b.j = m;
s->u.b.i = 0x01;
}
u->d->f = 0x10;
}</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>