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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang crashes when using C90 __restrict keyword"
href="https://bugs.llvm.org/show_bug.cgi?id=39849">39849</a>
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<th>Summary</th>
<td>Clang crashes when using C90 __restrict keyword
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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>All
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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>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>guille@berkeley.edu
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Created <span class=""><a href="attachment.cgi?id=21181" name="attach_21181" title="Source and preprocessed files for the two cases, triggering different crashes. [Note: Decompresses to current directory]">attachment 21181</a> <a href="attachment.cgi?id=21181&action=edit" title="Source and preprocessed files for the two cases, triggering different crashes. [Note: Decompresses to current directory]">[details]</a></span>
Source and preprocessed files for the two cases, triggering different crashes.
[Note: Decompresses to current directory]
<a href="https://godbolt.org/z/j_WU8P">https://godbolt.org/z/j_WU8P</a>
Minimal code is:
#include <immintrin.h>
struct S { __m128 operator + (const __m128 r) const { return r+l; } };
struct A
{
S s;
__m128 v;
void f(A& /*__restrict*/ a) __restrict __attribute__((used)) { v += s+a.v; }
};
int main() { return 0; }
Reporting two different crashes (files t1.cpp, t2.cpp attached).
Commenting in/out the first '__restrict' does not affect the result.
It's the second '__restrict' (the one affecting 'this') that triggers the bug.</pre>
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