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<base href="https://bugs.llvm.org/">
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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 - mergefunc crashes with "opt -newgvn -ipsccp -mergefunc": Assertion `getKindAsEnum() != AI.getKindAsEnum() && "Comparison of types would be unstable"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=42611">42611</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>mergefunc crashes with "opt -newgvn -ipsccp -mergefunc": Assertion `getKindAsEnum() != AI.getKindAsEnum() && "Comparison of types would be unstable"' 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>Scalar 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=22239" name="attach_22239" title=".bc file of the source code">attachment 22239</a> <a href="attachment.cgi?id=22239&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 363125)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/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 -newgvn -ipsccp -mergefunc small.bc -o small-opt.bc
opt: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/IR/Attributes.cpp:553:
bool llvm::AttributeImpl::operator<(const llvm::AttributeImpl&) const:
Assertion `getKindAsEnum() != AI.getKindAsEnum() && "Comparison of types would
be unstable"' failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt -newgvn -ipsccp
-mergefunc small.bc -o small-opt.bc
1. Running pass 'Merge Functions' on module 'small.bc'.
#0 0x000055fc1227887a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x257887a)
#1 0x000055fc12276534 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x2576534)
#2 0x000055fc12276672 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x2576672)
#3 0x00007fbcceb47890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007fbccd7f9e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007fbccd7fb801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007fbccd7eb39a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007fbccd7eb412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x000055fc11b4062e llvm::AttributeImpl::operator<(llvm::AttributeImpl
const&) const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1e4062e)
#9 0x000055fc122d566c llvm::FunctionComparator::cmpAttrs(llvm::AttributeList,
llvm::AttributeList) const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x25d566c)
#10 0x000055fc122d9573 llvm::FunctionComparator::compareSignature() const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x25d9573)
#11 0x000055fc122da732 llvm::FunctionComparator::compare()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x25da732)
#12 0x000055fc11d4d17b (anonymous
namespace)::MergeFunctions::runOnModule(llvm::Module&) (.part.427)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x204d17b)
#13 0x000055fc11c303e1 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f303e1)
#14 0x000055fc105190a9 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x8190a9)
#15 0x00007fbccd7dcb97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#16 0x000055fc1059e3fa _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x89e3fa)
Aborted (core dumped)
-------------------------------------
struct a {
long b;
short c;
long d;
};
static int e(struct a f, struct a g, struct a h, long i, short j) { return 0; }
static int k(struct a l, int m, short n, int o, short p) {
for (;;)
;
}</pre>
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