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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Windows] Returning structures from functions has wrong ABI"
href="http://llvm.org/bugs/show_bug.cgi?id=15556">15556</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[Windows] Returning structures from functions has wrong ABI
</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>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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>timurrrr@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Example:
----------------
$ cat cl.c
struct S {
int a, b, c;
};
struct S foo(void);
int main(void) {
struct S s = foo();
if (s.a != 1)
return 1;
if (s.b != 2)
return 2;
if (s.c != 3)
return 3;
return 0;
}
----------------
int printf(const char *fmt, ...);
void do_something_complex(void) {
printf("%d %d %d %d\n", 1, 2, 3, 4);
}
struct S {
int a, b, c;
};
struct S foo(void) {
struct S ret;
ret.a = 1;
ret.b = 2;
ret.c = 3;
do_something_complex();
return ret;
}
----------------
$ cl cl.c clang.c && ./cl.exe; echo $?
-> works fine
As of r177589,
$ clang clang.c -c && cl -c cl.c && link clang.o cl.obj && ./clang.exe ; echo
$?
-> Segmentation Fault after the printf.</pre>
</div>
</p>
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