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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 - clang crashes with "-mllvm -enable-newgvn": Assertion `(E->getOperand(0)->getType() == I->getOperand(0)->getType() && E->getOperand(1)->getType() == I->getOperand(1)->getType())' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=32947">32947</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang crashes with "-mllvm -enable-newgvn": Assertion `(E->getOperand(0)->getType() == I->getOperand(0)->getType() && E->getOperand(1)->getType() == I->getOperand(1)->getType())' failed.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</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>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>helloqirun@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I have two test cases here. The stack traces seem to be identical.
Case1: It crashes the current trunk version at "-O2" and above with "-mllvm
-enable-newgvn".
Case2: It crashes the current trunk version at "-O2" only with "-mllvm
-enable-newgvn".
$ clang-trunk -v
clang version 5.0.0 (trunk 302216)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/6.1.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/3.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.1.1
Found candidate GCC installation:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0
Found candidate GCC installation:
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/5.3.0
Selected GCC installation: /usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
$ clang-trunk -mllvm -enable-newgvn -O3 case1.c
case1.c:9:12: warning: address of function 'fn1' will always evaluate to 'true'
[-Wpointer-bool-conversion]
b |= fn1 && *c;
^~~ ~~
case1.c:9:12: note: prefix with the address-of operator to silence this warning
b |= fn1 && *c;
^
&
clang-5.0: /home/absozero/trunk/llvm/lib/Transforms/Scalar/NewGVN.cpp:866:
const llvm::GVNExpression::Expression *(anonymous
namespace)::NewGVN::createExpression(llvm::Instruction *): Assertion
`(E->getOperand(0)->getType() == I->getOperand(0)->getType() &&
E->getOperand(1)->getType() == I->getOperand(1)->getType())' failed.
#0 0x0000000001c82174 PrintStackTraceSignalHandler(void*)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1c82174)
#1 0x0000000001c824a6 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1c824a6)
#2 0x00007f5b21509330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#3 0x00007f5b20086c37 gsignal
/build/eglibc-oGUzwX/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#4 0x00007f5b2008a028 abort
/build/eglibc-oGUzwX/eglibc-2.19/stdlib/abort.c:91:0
#5 0x00007f5b2007fbf6 __assert_fail_base
/build/eglibc-oGUzwX/eglibc-2.19/assert/assert.c:92:0
#6 0x00007f5b2007fca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#7 0x0000000001b8934d (anonymous
namespace)::NewGVN::createExpression(llvm::Instruction*)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1b8934d)
#8 0x0000000001b79c03 (anonymous
namespace)::NewGVN::iterateTouchedInstructions()
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1b79c03)
#9 0x0000000001b73616 (anonymous namespace)::NewGVN::runGVN()
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1b73616)
#10 0x0000000001b70fa5 NewGVNLegacyPass::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1b70fa5)
#11 0x0000000001825a3f llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1825a3f)
#12 0x000000000266a796 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x266a796)
#13 0x0000000001826195 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1826195)
#14 0x0000000001e082cb clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout
const&, llvm::Module*, clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1e082cb)
#15 0x00000000024fad47
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x24fad47)
#16 0x00000000029577e6 clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x29577e6)
#17 0x00000000021d8658 clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x21d8658)
#18 0x000000000218b9f1
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x218b9f1)
#19 0x000000000225a94d
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x225a94d)
#20 0x0000000000839ebc cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-5.0+0x839ebc)
#21 0x0000000000837e55 main
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x837e55)
#22 0x00007f5b20071f45 __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:321:0
#23 0x0000000000835009 _start
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x835009)
Stack dump:
0. Program arguments: /home/absozero/trunk/root-clang/bin/clang-5.0 -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name
case1.c -mrelocation-model static -mthread-model posix -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu x86-64 -momit-leaf-frame-pointer -dwarf-column-info
-debugger-tuning=gdb -resource-dir
/home/absozero/trunk/root-clang/lib/clang/5.0.0 -internal-isystem
/usr/local/include -internal-isystem
/home/absozero/trunk/root-clang/lib/clang/5.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O3
-fdebug-compilation-dir /home/absozero/projects/reduction/crash -ferror-limit
19 -fmessage-length 172 -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -enable-newgvn -o
/tmp/case1-8738de.o -x c case1.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'case1.c'.
4. Running pass 'Global Value Numbering' on function '@fn1'
clang-5.0: error: unable to execute command: Aborted (core dumped)
clang-5.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 5.0.0 (trunk 302216)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-5.0: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and
associated run script.
clang-5.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-5.0: note: diagnostic msg: /tmp/case1-567b52.c
clang-5.0: note: diagnostic msg: /tmp/case1-567b52.sh
clang-5.0: note: diagnostic msg:
********************
$ cat case1.c
char a;
void fn1() {
long b;
if (0)
for (; b;) {
long *c = &b, *d = &b;
l1:
*d = a;
b |= fn1 && *c;
}
goto l1;
}
$ cat case2.c
int a, b;
void fn1() {
long c;
for (; b;)
for (; c;) {
long *d = &c, *e = &c;
l1:
*e = 8;
c |= a && *d;
}
goto l1;
}</pre>
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