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    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <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>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[X86] CVTTPD2DQ/CVTTPS2DQ intrinsics must not map to ISD::FP_TO_SINT etc.
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libraries
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Backend: X86
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>llvm-dev@redking.me.uk
          </td>
        </tr>

        <tr>
          <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
          </td>
        </tr></table>
      <p>
        <div>
        <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>
        </div>
      </p>


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