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<base href="http://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash in NewGVN if run after LICM"
href="http://bugs.llvm.org/show_bug.cgi?id=32607">32607</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Crash in NewGVN if run after LICM
</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>All
</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>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>keno@alumni.harvard.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Consider the following bugpoint-reduced test case:
```
; ModuleID = 'bugpoint-reduced-simplified.bc'
source_filename = "bugpoint-output-0d3dd22.bc"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define hidden void @"julia_populate_gal_fsm!_20586"() #0 {
top:
br label %if
if: ; preds = %if, %top
%0 = load double, double* undef, align 8, !tbaa !1, !noalias !5
%1 = fadd double %0, undef
store double %1, double* undef, align 8, !tbaa !1, !noalias !5
br i1 false, label %L50, label %if
L50: ; preds = %if
ret void
}
attributes #0 = { "no-frame-pointer-elim"="true" }
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"Debug Info Version", i32 3}
!1 = !{!2, !2, i64 0}
!2 = !{!"jtbaa_arraybuf", !3, i64 0}
!3 = !{!"jtbaa_data", !4, i64 0}
!4 = !{!"jtbaa"}
!5 = !{!6}
!6 = !{!"aliasscope", !7}
!7 = !{!"accum_galaxy_pos!"}
```
```
opt -licm -newgvn bugpoint-reduced-simplified.ll
opt: /home/ubuntu/llvm/lib/Transforms/Scalar/NewGVN.cpp:2167: void
{anonymous}::NewGVN::updateProcessedCount(llvm::Value*): Assertion
`ProcessedCount[V] < 100 && "Seem to have processed the same Value a lot"'
failed.
```
Now, before bugpoint, the failure looked different (and the input wasn't an
infinite loop), so this is possibly just something that bugpoint exposed, but I
can rerun on the original file once this is fixed.</pre>
</div>
</p>
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