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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Check for incompatible target features"
href="https://bugs.llvm.org/show_bug.cgi?id=52156">52156</a>
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<th>Summary</th>
<td>Check for incompatible target features
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Target Description Classes
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>lhames@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>In <a href="https://llvm.org/PR52031">https://llvm.org/PR52031</a> it was found that the module below passes the
verifier, despite the two functions main and new_function having incompatible
target-features.
If possible, we should have the verifier query the target to detect
incompatible features like this so that they can be quickly reported to users.
module.ll:
define i32 @main() #0 {
br label %1
1: ; preds = %1, %0
%2 = phi i64 [ 0, %0 ], [ %6, %1 ]
%3 = phi <4 x i64> [ <i64 -16, i64 -16, i64 -16, i64 -16>, %0 ], [ %5, %1 ]
%4 = trunc <4 x i64> %3 to <4 x i32>
%5 = call <4 x i64> @new_function(<4 x i64> %3)
%6 = add i64 %2, 1
%7 = icmp eq i64 %6, 2
br i1 %7, label %8, label %1
8: ; preds = %1
%9 = extractelement <4 x i32> %4, i32 3
ret i32 %9
}
define <4 x i64> @new_function(<4 x i64> %0) unnamed_addr {
%2 = add <4 x i64> %0, <i64 16, i64 16, i64 16, i64 16>
ret <4 x i64> %2
}
attributes #0 = { "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }</pre>
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