<html>
<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 - Loop Vectorizer triggers an assert "IsOrdered requires IsInLoop""
href="https://bugs.llvm.org/show_bug.cgi?id=52515">52515</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Loop Vectorizer triggers an assert "IsOrdered requires IsInLoop"
</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>Loop Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>serguei.katkov@azul.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>For the following reduced test case
===============================================
; ModuleID = 'bad.ll'
source_filename = "bad.ll"
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-none-linux-gnu"
define float @wombat() {
bb:
br label %bb1
bb1: ; preds = %bb9, %bb
%tmp = phi i64 [ 0, %bb ], [ %tmp10, %bb9 ]
%tmp2 = phi float [ 0.000000e+00, %bb ], [ %tmp4, %bb9 ]
%tmp3 = phi i64 [ 0, %bb ], [ %tmp5, %bb9 ]
%tmp4 = fadd float %tmp2, 1.000000e+00
%tmp5 = add nsw i64 %tmp3, 1
%tmp6 = icmp ult i64 %tmp, 65536
br i1 %tmp6, label %bb9, label %bb7
bb7: ; preds = %bb1
%tmp8 = phi float [ %tmp4, %bb1 ]
ret float %tmp8
bb9: ; preds = %bb1
%tmp10 = add nuw nsw i64 %tmp, 1
br i1 false, label %bb11, label %bb1
bb11: ; preds = %bb9
%tmp12 = phi float [ %tmp4, %bb9 ]
ret float %tmp12
}
!0 = !{!"function_entry_count", i64 32768}
===============================================
the following assert is triggered.
===============================================
<span class="quote">> opt -passes=loop-vectorize -S bad.ll</span >
opt:
/localhome/skatkov/work/llvm/src/llvm/lib/Transforms/Vectorize/VPlan.h:1186:
llvm::VPReductionPHIRecipe::VPReductionPHIRecipe(llvm::PHINode*,
llvm::RecurrenceDescriptor&, llvm::VPValue&, bool, bool): Assertion
`(!IsOrdered || IsInLoop) && "IsOrdered requires IsInLoop"' failed.
===============================================
The current processing phi node is
%tmp2 = phi float [ 0.000000e+00, %bb ], [ %tmp4, %bb9 ]</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>