<html>
    <head>
      <base href="http://llvm.org/bugs/" />
    </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 --- - [AVX512] Cannot select: 0x7fd80b841b68: ch = store when returning <16 x i1> from function"
   href="http://llvm.org/bugs/show_bug.cgi?id=20723">20723</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[AVX512] Cannot select: 0x7fd80b841b68: ch = store when returning <16 x i1> from function
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>new bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>matt@pharr.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>With top of tree and this program, I get the following crash:

; ModuleID = 'bugpoint-reduced-simplified.bc'
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-darwin13.3.0"

define <16 x i1> @crashEven___(i16 %__mask) {
allocas:
  ret <16 x i1> zeroinitializer
}


% llc -mcpu=knl bugpoint-reduced-simplified.ll -filetype=asm -o -
    .section    __TEXT,__text,regular,pure_instructions
    .macosx_version_min 13, 3
LLVM ERROR: Cannot select: 0x7fd80b841b68: ch = store 0x7fd80b841640,
0x7fd80b841118, 0x7fd80b841538, 0x7fd80b841a60<ST2[<unknown>](align=16)>
[ORD=2] [ID=11]
  0x7fd80b841118: v16i1 = BUILD_VECTOR 0x7fd80b841010, 0x7fd80b841010,
0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010,
0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010,
0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010 [ORD=2] [ID=8]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
  0x7fd80b841538: i64 = Register %vreg3 [ID=3]
  0x7fd80b841a60: i64 = undef [ID=4]
In function: crashEven___
%</pre>
        </div>
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