<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 - Assertion `Get(To) == To && "Replacement PHI node is already replaced."' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=41052">41052</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion `Get(To) == To && "Replacement PHI node is already replaced."' failed
</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>Linux
</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>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jesper.antonsson@ericsson.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21590" name="attach_21590" title="reproducer for the assert">attachment 21590</a> <a href="attachment.cgi?id=21590&action=edit" title="reproducer for the assert">[details]</a></span>
reproducer for the assert
This assertion in CodeGenPrepare was hit from a Csmith generate. It involves
trying to optimize a store instruction in a dead basic block. Reduced mir test
attached.
-> build-all/bin/llc -run-pass=codegenprepare -o -
codegen-prepare-replacephi.mir
llc: ../lib/CodeGen/CodeGenPrepare.cpp:2879: void (anonymous
namespace)::SimplificationTracker::ReplacePhi(llvm::PHINode *, llvm::PHINode
*): Assertion `Get(To) == To && "Replacement PHI node is already replaced."'
failed.
Stack dump:
0. Program arguments: build-all/bin/llc -run-pass=codegenprepare -o -
codegen-prepare-replacephi.mir
1. Running pass 'Function Pass Manager' on module
'codegen-prepare-replacephi.mir'.
2. Running pass 'CodeGen Prepare' on function '@f1'
#0 0x00000000022a9824 PrintStackTraceSignalHandler(void*)
(build-all/bin/llc+0x22a9824)
#1 0x00000000022a73f0 llvm::sys::RunSignalHandlers()
(build-all/bin/llc+0x22a73f0)
#2 0x00000000022a9c68 SignalHandler(int) (build-all/bin/llc+0x22a9c68)
#3 0x00007f25650ae390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#4 0x00007f2563c18428 gsignal
/build/glibc-Cl5G7W/glibc-2.23/signal/../sysdeps/unix/sysv/linux/raise.c:54:0
#5 0x00007f2563c1a02a abort /build/glibc-Cl5G7W/glibc-2.23/stdlib/abort.c:91:0
#6 0x00007f2563c10bd7 __assert_fail_base
/build/glibc-Cl5G7W/glibc-2.23/assert/assert.c:92:0
#7 0x00007f2563c10c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82)
#8 0x00000000017ec352 (anonymous
namespace)::AddressingModeCombiner::combineAddrModes()
(build-all/bin/llc+0x17ec352)
#9 0x00000000017de2b0 (anonymous
namespace)::CodeGenPrepare::optimizeMemoryInst(llvm::Instruction*,
llvm::Value*, llvm::Type*, unsigned int) (build-all/bin/llc+0x17de2b0)
#10 0x00000000017d50f8 (anonymous
namespace)::CodeGenPrepare::optimizeInst(llvm::Instruction*, bool&)
(build-all/bin/llc+0x17d50f8)
#11 0x00000000017ce2c0 (anonymous
namespace)::CodeGenPrepare::runOnFunction(llvm::Function&)
(build-all/bin/llc+0x17ce2c0)
#12 0x0000000001c41dab llvm::FPPassManager::runOnFunction(llvm::Function&)
(build-all/bin/llc+0x1c41dab)
#13 0x0000000001c42063 llvm::FPPassManager::runOnModule(llvm::Module&)
(build-all/bin/llc+0x1c42063)
#14 0x0000000001c4265f llvm::legacy::PassManagerImpl::run(llvm::Module&)
(build-all/bin/llc+0x1c4265f)
#15 0x000000000073d3a7 compileModule(char**, llvm::LLVMContext&)
(build-all/bin/llc+0x73d3a7)
#16 0x000000000073a9e0 main (build-all/bin/llc+0x73a9e0)
#17 0x00007f2563c03830 __libc_start_main
/build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:325:0
#18 0x0000000000738bf9 _start (build-all/bin/llc+0x738bf9)
Aborted (core dumped)</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>