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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] CVTTPD2DQ/CVTTPS2DQ intrinsics must not map to ISD::FP_TO_SINT etc."
href="https://bugs.llvm.org/show_bug.cgi?id=37751">37751</a>
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<th>Summary</th>
<td>[X86] CVTTPD2DQ/CVTTPS2DQ intrinsics must not map to ISD::FP_TO_SINT etc.
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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, efriedma@codeaurora.org, filcab@gmail.com, greg.bedwell@sony.com, llvm-bugs@lists.llvm.org, spatel+llvm@rotateright.com
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<pre>Now that we have FP_TO_*INT combines in DAGCombine (rL330437 for rounding
etc.), we can no longer safely map x86 f2i intrinsics to generic types:
X86_INTRINSIC_DATA(avx_cvtt_ps2dq_256,INTR_TYPE_1OP, ISD::FP_TO_SINT, 0)
as this will lose the intrinsics' special case handling for out of range
values.
All these values need mapping to the X86ISD equivalents (CVTTP2SI/CVTTP2UI)
instead and suitable constant folding support adding so we don't lose any
functionality.</pre>
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