<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] 'align_value' attribute not added to variables in types (LLVM type can't express it?)"
href="https://bugs.llvm.org/show_bug.cgi?id=44527">44527</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[clang] 'align_value' attribute not added to variables in types (LLVM type can't express it?)
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>lebedev.ri@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>typedef double * aligned_double_ptr __attribute__((align_value(64)));
struct S {
aligned_double_ptr y;
};
void foo(S*s){
s->y = 0;
}
As per <a href="https://godbolt.org/z/PtLP2e">https://godbolt.org/z/PtLP2e</a>
we get
%struct.S = type { double* }
define dso_local void @_Z3fooP1S(%struct.S* nocapture %0) local_unnamed_addr #0
{
%2 = getelementptr inbounds %struct.S, %struct.S* %0, i64 0, i32 0
store double* null, double** %2, align 8, !tbaa !2
ret void
}
So the alignment info did not reach IR.</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>