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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 'Memory SSA' pass crashes with "opt -jump-threading -gvn -loop-unswitch -loop-rotate -structurizecfg -licm -ipsccp -loop-extract-single -gvn -inline -early-cse-memssa""
href="https://bugs.llvm.org/show_bug.cgi?id=41695">41695</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>'Memory SSA' pass crashes with "opt -jump-threading -gvn -loop-unswitch -loop-rotate -structurizecfg -licm -ipsccp -loop-extract-single -gvn -inline -early-cse-memssa"
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>8.0
</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=21860" name="attach_21860" title=".bc file of the source code">attachment 21860</a> <a href="attachment.cgi?id=21860&action=edit" title=".bc file of the source code">[details]</a></span>
.bc file of the source code
$clang -v
clang version 8.0.0 (tags/RELEASE_800/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/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 -mllvm -disable-llvm-optzns small.c -o small.bc
$opt -jump-threading -gvn -loop-unswitch -loop-rotate -structurizecfg -licm
-ipsccp -loop-extract-single -gvn -inline -early-cse-memssa small.bc -o
small-opt.bc
Stack dump:
0. Program arguments:
/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt
-jump-threading -gvn -loop-unswitch -loop-rotate -structurizecfg -licm -ipsccp
-loop-extract-single -gvn -inline -early-cse-memssa small.bc -o small-opt.bc
1. Running pass 'CallGraph Pass Manager' on module 'small.bc'.
2. Running pass 'Memory SSA' on function '@e'
#0 0x0000000001da98f4 PrintStackTraceSignalHandler(void*)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x1da98f4)
#1 0x0000000001da781e llvm::sys::RunSignalHandlers()
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x1da781e)
#2 0x0000000001da9cf8 SignalHandler(int)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x1da9cf8)
#3 0x00007fde53658890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00000000013329cf llvm::BasicAAResult::aliasCheck(llvm::Value const*,
llvm::LocationSize, llvm::AAMDNodes, llvm::Value const*, llvm::LocationSize,
llvm::AAMDNodes, llvm::Value const*, llvm::Value const*)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x13329cf)
#5 0x00000000013328b8 llvm::BasicAAResult::alias(llvm::MemoryLocation const&,
llvm::MemoryLocation const&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x13328b8)
#6 0x000000000131d9af llvm::AAResults::alias(llvm::MemoryLocation const&,
llvm::MemoryLocation const&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x131d9af)
#7 0x0000000001422510 instructionClobbersQuery(llvm::MemoryDef const*,
llvm::MemoryLocation const&, llvm::Instruction const*, llvm::AAResults&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x1422510)
#8 0x000000000141d1dc llvm::MemorySSA::OptimizeUses::optimizeUses()
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x141d1dc)
#9 0x000000000141bfda llvm::MemorySSA::buildMemorySSA()
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x141bfda)
#10 0x00000000014206f8
llvm::MemorySSAWrapperPass::runOnFunction(llvm::Function&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x14206f8)
#11 0x00000000018b37da llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x18b37da)
#12 0x0000000001369994 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x1369994)
#13 0x00000000018b40df llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x18b40df)
#14 0x00000000007e0bb1 main
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x7e0bb1)
#15 0x00007fde520e5b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#16 0x00000000007cac0a _start
(/home/jack-zhou/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/opt+0x7cac0a)
Segmentation fault (core dumped)
---------------------------------------------
int a, b, c;
int *d;
int e(int f, int g) {
h:
for (a = 0; 0;)
;
if (g) {
b = 0;
for (; b != 2;) {
*d = c;
if (d) {
int i[0];
if (f)
if (a)
goto h;
}
}
}
}</pre>
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