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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - combineUIntToFP - UINT_TO_FP(vXi1) handling"
href="https://bugs.llvm.org/show_bug.cgi?id=39078">39078</a>
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<th>Summary</th>
<td>combineUIntToFP - UINT_TO_FP(vXi1) handling
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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
</td>
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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
</td>
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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>craig.topper@gmail.com, llvm-bugs@lists.llvm.org
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<pre>X86's UINT_TO_FP combine for bool vectors has a comment:
// UINT_TO_FP(vXi1) -> SINT_TO_FP(SEXT(vXi1 to vXi32))
// UINT_TO_FP(vXi8) -> SINT_TO_FP(ZEXT(vXi8 to vXi32))
// UINT_TO_FP(vXi16) -> SINT_TO_FP(ZEXT(vXi16 to vXi32))
But always zero-extends the source:
SDValue P = DAG.getNode(ISD::ZERO_EXTEND, dl, DstVT, Op0);
return DAG.getNode(ISD::SINT_TO_FP, dl, VT, P);</pre>
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