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<base href="https://bugs.llvm.org/">
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash in SROA pass for initializing non-first base class from variadic function template"
href="https://bugs.llvm.org/show_bug.cgi?id=39732">39732</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Crash in SROA pass for initializing non-first base class from variadic function template
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>max.langhof@gmx.de
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Minimal code (<a href="https://godbolt.org/z/R6TQQ8">https://godbolt.org/z/R6TQQ8</a>):
#include <memory>
struct A {
std::unique_ptr<int> x;
};
struct B {
std::unique_ptr<int> y;
};
struct AB : A, B
{};
void foo() {
AB ab{ nullptr, std::make_unique<int>(1) };
}
Condensed, most interesting cases:
<a href="https://godbolt.org/z/R1WNy3">https://godbolt.org/z/R1WNy3</a>
Lots of test cases:
<a href="https://godbolt.org/z/dTpb4">https://godbolt.org/z/dTpb4</a>-
This crash exists in all clang versions (that are new enough to compile the
above), see godbolt links.
##############
Stack trace:
0. Program arguments:
/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8 -cc1 -triple
x86_64-unknown-linux-gnu -S -disable-free -disable-llvm-verifier
-discard-value-names -main-file-name example.cpp -mrelocation-model static
-mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases
-munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info
-debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb
-momit-leaf-frame-pointer -coverage-notes-file
/tmp/compiler-explorer-compiler1181020-55-j6o6z1.avoz/output.gcno -resource-dir
/opt/compiler-explorer/clang-trunk-20181111/lib/clang/8.0.0 -internal-isystem
/opt/compiler-explorer/gcc-8.2.0/lib/gcc/x86_64-linux-gnu/8.2.0/../../../../include/c++/8.2.0
-internal-isystem
/opt/compiler-explorer/gcc-8.2.0/lib/gcc/x86_64-linux-gnu/8.2.0/../../../../include/c++/8.2.0/x86_64-linux-gnu
-internal-isystem
/opt/compiler-explorer/gcc-8.2.0/lib/gcc/x86_64-linux-gnu/8.2.0/../../../../include/c++/8.2.0/backward
-internal-isystem /usr/local/include -internal-isystem
/opt/compiler-explorer/clang-trunk-20181111/lib/clang/8.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O1
-std=c++17 -fdeprecated-macro -fdebug-compilation-dir
/tmp/compiler-explorer-compiler1181020-55-j6o6z1.avoz -ferror-limit 19
-fmessage-length 0 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -mllvm --x86-asm-syntax=intel -o
/tmp/compiler-explorer-compiler1181020-55-j6o6z1.avoz/output.s -x c++ <source>
-faddrsig
1. <eof> parser at end of file
2. Per-function optimization
3. Running pass 'SROA' on function '@_Z3foov'
#0 0x000055f18ccfdcfa llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2362cfa)
#1 0x000055f18ccfc264 llvm::sys::RunSignalHandlers()
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2361264)
#2 0x000055f18ccfc3a2 SignalHandler(int)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x23613a2)
#3 0x00007effde8ed890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x000055f18c69f8f0 llvm::BasicBlock::getModule() const
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x1d048f0)
#5 0x000055f18cc0fd0e
llvm::sroa::AllocaSlices::SliceBuilder::visitStoreInst(llvm::StoreInst&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2274d0e)
#6 0x000055f18cc15753 llvm::sroa::AllocaSlices::AllocaSlices(llvm::DataLayout
const&, llvm::AllocaInst&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x227a753)
#7 0x000055f18cc204db llvm::SROA::runOnAlloca(llvm::AllocaInst&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x22854db)
#8 0x000055f18cc22231 llvm::SROA::runImpl(llvm::Function&,
llvm::DominatorTree&, llvm::AssumptionCache&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2287231)
#9 0x000055f18cc23dbc
llvm::sroa::SROALegacyPass::runOnFunction(llvm::Function&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2288dbc)
#10 0x000055f18c74aa09 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x1dafa09)
#11 0x000055f18c74ab1c
llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x1dafb1c)
#12 0x000055f18c74ae02 llvm::legacy::FunctionPassManager::run(llvm::Function&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x1dafe02)
#13 0x000055f18cf0356b (anonymous
namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x256856b)
#14 0x000055f18cf05cfe 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> >)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x256acfe)
#15 0x000055f18d821eaf
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2e86eaf)
#16 0x000055f18df9b2b9 clang::ParseAST(clang::Sema&, bool, bool)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x36002b9)
#17 0x000055f18d820da7 clang::CodeGenAction::ExecuteAction()
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2e85da7)
#18 0x000055f18d3810c6 clang::FrontendAction::Execute()
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x29e60c6)
#19 0x000055f18d345a2c
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x29aaa2c)
#20 0x000055f18d43d76b
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x2aa276b)
#21 0x000055f18b441668 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0xaa6668)
#22 0x000055f18b395b09 main
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0x9fab09)
#23 0x00007effdd7a6b97 __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b97)
#24 0x000055f18b43e90a _start
(/opt/compiler-explorer/clang-trunk-20181111/bin/clang-8+0xaa390a)</pre>
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</p>
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