<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 - Failure casting from __generic to __global address space when variable is volatile"
href="https://bugs.llvm.org/show_bug.cgi?id=41567">41567</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Failure casting from __generic to __global address space when variable is volatile
</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>OpenCL
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>drohr@jwdt.org
</td>
</tr>
<tr>
<th>CC</th>
<td>anastasia.stulova@arm.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21815" name="attach_21815" title="Failing test case">attachment 21815</a> <a href="attachment.cgi?id=21815&action=edit" title="Failing test case">[details]</a></span>
Failing test case
The attached test_case (test_fail.cl) attempts to cast a volatile int* to
__global volatile int*, it fails compilation with clang 9 (commit
4b56b8f9df9d7fe4ee69f56fc4726910a4a72b04) with the following error message:
test_fail.cl:3:50: error: internal error: could not emit constant value
"abstractly"
atomic_add((__global volatile unsigned int*) a, 1);
The modified test case (test_work.cl), which only has the volatile keyword
removed, works.
Command line is: clang++ -cl-std=c++ -x cl -cl-denorms-are-zero -cl-mad-enable
-cl-no-signed-zeros -Xclang -finclude-default-header -c test_fail.cl -o test.o
Background: Following the discussion on
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Clang internal error during compilation of OpenCL C++ code"
href="show_bug.cgi?id=40778">https://bugs.llvm.org/show_bug.cgi?id=40778</a>, I changed my code to have
different functions for old-style atomic operations on __global and __local
address space. During that process, I came across this issue.</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>