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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Inline asm miscompile (test segfaults)"
href="https://bugs.llvm.org/show_bug.cgi?id=50943">50943</a>
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<th>Summary</th>
<td>Inline asm miscompile (test segfaults)
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: X86
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>paul_robinson@playstation.sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, pengfei.wang@intel.com, spatel+llvm@rotateright.com
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<p>
<div>
<pre>Reduced from gdb test case gdb.arch/i386-avx.c
$ cat t1.c
typedef struct {
float f[8];
} v8sf_t;
v8sf_t data[] =
{
{ { 0.0, 0.125, 0.25, 0.375, 0.50, 0.625, 0.75, 0.875 } },
};
int main (int argc, char **argv) {
asm ("vmovaps 0(%0), %%ymm0\n\t"
: /* no output operands */
: "r" (data)
: "xmm0");
return 0;
}
$ gcc t1.c -o t1-gcc
$ ./t1-gcc
$ clang t1.c -o t1-clang
$ ./t1-clang
Segementation fault
$
using gcc 7.5.0 and clang 13 1f169a77</pre>
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