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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86][SSE] Adjust shouldFoldShiftPairToMask for btver2 targets for uniform constant shifts"
href="https://bugs.llvm.org/show_bug.cgi?id=40758">40758</a>
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<th>Summary</th>
<td>[X86][SSE] Adjust shouldFoldShiftPairToMask for btver2 targets for uniform constant shifts
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<th>Product</th>
<td>libraries
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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>Windows NT
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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>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
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<th>CC</th>
<td>andrea.dibiagio@gmail.com, craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<pre>As discussed on <a href="https://reviews.llvm.org/D58225">https://reviews.llvm.org/D58225</a>, for the btver2 (Jaguar) target
(and maybe some others), it would be better to use 2 uniform constant shifts
than a shift and a mask loaded from constant pool (even if the mask is lifted
out of a hot loop I don't think it gives any benefit).
This probably means yet another Feature bit.....</pre>
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