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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - x86 crash: cannot select v4i32 = vselect"
href="http://llvm.org/bugs/show_bug.cgi?id=15352">15352</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>x86 crash: cannot select v4i32 = vselect
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>Created <span class=""><a href="attachment.cgi?id=10074" name="attach_10074" title="test case">attachment 10074</a> <a href="attachment.cgi?id=10074&action=edit" title="test case">[details]</a></span>
test case
With the attached test case, if I run:
% llc bug.bc -o -
I get the following crash:
LLVM ERROR: Cannot select: 0x7feb3984fb10: v4i32 = vselect 0x7feb39850010,
0x7feb39872310, 0x7feb3984fc10 [ORD=574] [ID=32]
0x7feb39850010: v4i32 = X86ISD::CMPP 0x7feb39850810, 0x7feb39850f10,
0x7feb3986e310 [ID=31]
0x7feb39850810: v4f32,ch = load 0x7feb39459688, 0x7feb3986eb10,
0x7feb39872f10<LD16[ConstantPool]> [ID=25]
0x7feb3986eb10: i64 = X86ISD::WrapperRIP 0x7feb39873f10 [ID=22]
0x7feb39873f10: i64 = TargetConstantPool<<4 x float> <float
0x3EB0C6F7A0000000, float 0x3EB0C6F7A0000000, float 0x3EB0C6F7A0000000, float
0x3EB0C6F7A0000000>> 0 [ID=16]
0x7feb39872f10: i64 = undef [ID=14]
0x7feb39850f10: v4f32 = bitcast 0x7feb39873210 [ID=29]
0x7feb39873210: v2i64 = and 0x7feb39873e10, 0x7feb39850e10 [ID=28]
0x7feb39873e10: v2i64 = bitcast 0x7feb39850a10 [ID=26]
0x7feb39850a10: v4f32 = fsub 0x7feb39850710, 0x7feb39873b10 [ORD=569]
[ID=23]
0x7feb39850710: v4f32,ch = CopyFromReg 0x7feb39459688,
0x7feb3987a210 [ORD=569] [ID=17]
0x7feb3987a210: v4f32 = Register %vreg6 [ORD=569] [ID=1]
0x7feb39873b10: v4f32,ch = CopyFromReg 0x7feb39459688,
0x7feb3986e210 [ORD=569] [ID=18]
0x7feb3986e210: v4f32 = Register %vreg7 [ORD=569] [ID=2]
0x7feb39850e10: v2i64,ch = load 0x7feb39459688, 0x7feb39873010,
0x7feb39872f10<LD16[ConstantPool]> [ID=24]
0x7feb39873010: i64 = X86ISD::WrapperRIP 0x7feb39851210 [ID=21]
0x7feb39851210: i64 = TargetConstantPool<<4 x i32> <i32 2147483647,
i32 2147483647, i32 2147483647, i32 2147483647>> 0 [ID=15]
0x7feb39872f10: i64 = undef [ID=14]
0x7feb3986e310: i8 = Constant<6> [ID=12]
0x7feb39872310: v4i32,ch = CopyFromReg 0x7feb39459688, 0x7feb39872e10
[ORD=574] [ID=19]
0x7feb39872e10: v4i32 = Register %vreg8 [ORD=574] [ID=3]
0x7feb3984fc10: v4i32 = BUILD_VECTOR 0x7feb3986e710, 0x7feb3986e710,
0x7feb3986e710, 0x7feb3986e710 [ORD=574] [ID=20]
0x7feb3986e710: i32 = Constant<0> [ORD=574] [ID=6]
0x7feb3986e710: i32 = Constant<0> [ORD=574] [ID=6]
0x7feb3986e710: i32 = Constant<0> [ORD=574] [ID=6]
0x7feb3986e710: i32 = Constant<0> [ORD=574] [ID=6]
According to <a href="https://github.com/ispc/ispc/issues/430">https://github.com/ispc/ispc/issues/430</a>, this was introduced in
r175336, but I haven't personally verified this.</pre>
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