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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Vector load operations vec_xl have non-const pointers in their signature"
href="https://bugs.llvm.org/show_bug.cgi?id=46817">46817</a>
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<th>Summary</th>
<td>Vector load operations vec_xl have non-const pointers in their signature
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Headers
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>alexander.grund@tu-dresden.de
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>I'm getting failed compilations for code using vec_xl on IBM Power architecture
machines where the input is a `const float*`.
GCC happily accepts the same code but on clang it fails to resolved the
function as the clang vec_xl functions use non-const pointers.
>From a semantic PoV using const pointers is more correct as the value is only
read. Example:
static inline __ATTRS_o_ai vector signed long long
vec_xl(signed long long __offset, signed long long *__ptr) {
return *(unaligned_vec_sll *)(__ptr + __offset);
}
Note that changing to const pointers is backward compatible as they can be
converted from non-const pointers implicitly.</pre>
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