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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Macros in Intel intrinsic headers missing enclosing parentheses"
href="https://bugs.llvm.org/show_bug.cgi?id=51324">51324</a>
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<th>Summary</th>
<td>Macros in Intel intrinsic headers missing enclosing parentheses
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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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>ehandal@gmail.com
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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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<p>
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<pre>I've seen macros like this in smmintrin.h and xmmintrin.h:
#define _mm_round_ps(X, M) \
(__m128)__builtin_ia32_roundps((__v4sf)(__m128)(X), (M))
Specifically, macros where the result is casted are missing parentheses
enclosing the cast, leading to unexpected behavior and compile errors if any
operators with higher precedence than the cast are used directly on the return
value.
It's possible more of the Intel intrinsic headers have this issue, but I only
checked the two headers above.</pre>
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