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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ipconstprop crashes: Assertion `!contains(New, this) && "this->replaceAllUsesWith(expr(this)) is NOT valid!"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=42613">42613</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ipconstprop crashes: Assertion `!contains(New, this) && "this->replaceAllUsesWith(expr(this)) is NOT valid!"' 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>Interprocedural Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>cszide@163.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=22241" name="attach_22241" title=".bc file of the source code">attachment 22241</a> <a href="attachment.cgi?id=22241&action=edit" title=".bc file of the source code">[details]</a></span>
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 364630)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
$opt -mem2reg -jump-threading -ipconstprop small.bc -o small-opt.bc
opt: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/IR/Value.cpp:401: void
llvm::Value::doRAUW(llvm::Value*, llvm::Value::ReplaceMetadataUses): Assertion
`!contains(New, this) && "this->replaceAllUsesWith(expr(this)) is NOT valid!"'
failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt -mem2reg
-jump-threading -ipconstprop small.bc -o small-opt.bc
1. Running pass 'Interprocedural constant propagation' on module
'small.bc'.
#0 0x00005622136010ca llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x25ce0ca)
#1 0x00005622135fed84 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x25cbd84)
#2 0x00005622135feec2 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x25cbec2)
#3 0x00007f24acf85890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f24abc37e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f24abc39801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f24abc2939a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007f24abc29412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x000056221300783b llvm::Value::doRAUW(llvm::Value*,
llvm::Value::ReplaceMetadataUses)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x1fd483b)
#9 0x0000562213099b09 (anonymous namespace)::IPCP::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x2066b09)
#10 0x0000562212fabb91 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x1f78b91)
#11 0x000056221185c694 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x829694)
#12 0x00007f24abc1ab97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#13 0x00005622118e242a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build2/bin/opt+0x8af42a)
Aborted (core dumped)
------------------------------------------------------------
int a;
int *b(int *c) { return c; }
void d() {
a = 1;
if (a)
;
else {
int *e;
for (;;) {
int **f = &e;
*f = b(e);
}
}
}</pre>
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