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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - [OpenCL] Produces illegal address space conversions for automatic local struct arrays" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D24004&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=0sHRyEjJxXn1fQGtbvaB_oRKYQLzBrEk-6Ga0jLbre4&s=6TGefAEaQ_9VW9mertRdbXeIocg1ZkbaOyGcXwkOBh4&e=">24004</a>
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<th>Summary</th>
<td>[OpenCL] Produces illegal address space conversions for automatic local struct arrays
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>pekka.jaaskelainen@tut.fi
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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</tr></table>
<p>
<div>
<pre>Related pocl bug: <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_pocl_pocl_issues_195&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=0sHRyEjJxXn1fQGtbvaB_oRKYQLzBrEk-6Ga0jLbre4&s=6_TXMTg_8M3V6PaXcAZl2wAUiTxGb2MoqwdLwqLDbbE&e=">https://github.com/pocl/pocl/issues/195</a>
Reproduce with a scan.cl:
typedef struct {
int c00;
int c01;
} scan_t;
scan_t add(scan_t a, scan_t b)
{
return b;
}
kernel
void scan_scan_intervals_lev1()
{
local scan_t psc_ldata[2];
psc_ldata[0] = add(psc_ldata[0], psc_ldata[1]);
}
clang -Xclang -ffake-address-space-map -x cl scan.cl -emit-llvm -c -S -o -
This either crashes with an assertion (in case Clang built with assertions) or
generates an illegal bitcast between address spaceslike this:
%1 = load i64* bitcast (%struct.scan_t addrspace(2)* getelementptr inbounds ([2
x %struct.scan_t] addrspace(2)* @scan_scan_intervals_lev1.psc_ldata, i64 0, i64
1) to i6</pre>
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