[llvm-bugs] [Bug 33204] void {anonymous}::NewGVN::verifyIterationSettled(llvm::Function&): Assertion `BeforeCC->isEquivalentTo(AfterCC) && "Value number changed after main loop completed!"' failed

Mon Sep 4 02:08:44 PDT 2017

https://bugs.llvm.org/show_bug.cgi?id=33204

Stephan Bergmann <stephan.bergmann.secondary at googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |---
             Status|RESOLVED                    |REOPENED

--- Comment #12 from Stephan Bergmann <stephan.bergmann.secondary at googlemail.com> ---
This assertion started to hit again with recent trunk (I'm on r312468):

* In the meantime, I've seen LibreOffice built successfully with -enable-newgvn
with some Clang trunk after r311829.

* This issue's original reproducer (attachment 18528 plus
<http://people.redhat.com/sbergman/CoinOslFactorization3-43aa00.cpp>) still
succeeds with r312468.

* What fails now with r312468 is building CoinPackedMatrix.cpp (from building
CoinMP as part of LibreOffice) with -enable-newgvn:

> clang-6.0: /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Transforms/Scalar/NewGVN.cpp:3123: void {anonymous}::NewGVN::verifyIterationSettled(llvm::Function&): Assertion `BeforeCC->isEquivalentTo(AfterCC) && "Value number changed after main loop completed!"' failed.
> #0 0x00000000020306ea llvm::sys::PrintStackTrace(llvm::raw_ostream&) /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Support/Unix/Signals.inc:402:0
> #1 0x000000000202e61e llvm::sys::RunSignalHandlers() /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Support/Signals.cpp:50:0
> #2 0x000000000202e76c SignalHandler(int) /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Support/Unix/Signals.inc:252:0
> #3 0x00007fc6757c45b0 __restore_rt (/lib64/libpthread.so.0+0x115b0)
> #4 0x00007fc67432c8df __GI_raise /usr/src/debug/glibc-2.24-61-g605e6f9/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
> #5 0x00007fc67432e4da __GI_abort /usr/src/debug/glibc-2.24-61-g605e6f9/stdlib/abort.c:91:0
> #6 0x00007fc674324d67 __assert_fail_base /usr/src/debug/glibc-2.24-61-g605e6f9/assert/assert.c:92:0
> #7 0x00007fc674324e12 (/lib64/libc.so.6+0x2de12)
> #8 0x0000000001f44dc4 verifyIterationSettled /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Transforms/Scalar/NewGVN.cpp:3122:0
> #9 0x0000000001f44dc4 (anonymous namespace)::NewGVN::runGVN() /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Transforms/Scalar/NewGVN.cpp:3293:0
> #10 0x0000000001f46167 (anonymous namespace)::NewGVNLegacyPass::runOnFunction(llvm::Function&) [clone .part.1455] /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Transforms/Scalar/NewGVN.cpp:4032:0
> #11 0x0000000001baae7b llvm::FPPassManager::runOnFunction(llvm::Function&) /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/IR/LegacyPassManager.cpp:1514:0
> #12 0x000000000165e8cb RunPassOnSCC /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
> #13 0x000000000165e8cb RunAllPassesOnSCC /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
> #14 0x000000000165e8cb (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
> #15 0x0000000001babaa1 runOnModule /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/IR/LegacyPassManager.cpp:1591:0
> #16 0x0000000001babaa1 llvm::legacy::PassManagerImpl::run(llvm::Module&) /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/lib/IR/LegacyPassManager.cpp:1694:0
> #17 0x00000000021d26af llvm::PrettyStackTraceString::~PrettyStackTraceString() /data/sbergman/github.com/llvm-project/llvm-project-20170507/llvm/include/llvm/Support/PrettyStackTrace.h:52:0
> #18 0x00000000021d26af EmitAssembly /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/CodeGen/BackendUtil.cpp:788:0
> #19 0x00000000021d26af 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> >) /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/CodeGen/BackendUtil.cpp:1145:0
> #20 0x00000000029b8158 std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >::~unique_ptr() /usr/include/c++/6.4.1/bits/unique_ptr.h:238:0
> #21 0x00000000029b8158 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/CodeGen/CodeGenAction.cpp:261:0
> #22 0x0000000002b8ab98 std::enable_if<std::__and_<std::is_move_constructible<bool>, std::is_move_assignable<bool> >::value, void>::type std::swap<bool>(bool&, bool&) /usr/include/c++/6.4.1/bits/move.h:192:0
> #23 0x0000000002b8ab98 clang::ParseAST(clang::Sema&, bool, bool) /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/Parse/ParseAST.cpp:161:0
> #24 0x00000000029b7469 clang::CodeGenAction::ExecuteAction() /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/CodeGen/CodeGenAction.cpp:993:0
> #25 0x0000000002569db6 clang::FrontendAction::Execute() /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/Frontend/FrontendAction.cpp:902:0
> #26 0x0000000002538186 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/Frontend/CompilerInstance.cpp:987:0
> #27 0x00000000025f88a2 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
> #28 0x0000000000af3fe8 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/tools/driver/cc1_main.cpp:221:0
> #29 0x0000000000a71ca9 ExecuteCC1Tool /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/tools/driver/driver.cpp:302:0
> #30 0x0000000000a71ca9 main /data/sbergman/github.com/llvm-project/llvm-project-20170507/clang/tools/driver/driver.cpp:381:0
> #31 0x00007fc674317401 __libc_start_main /usr/src/debug/glibc-2.24-61-g605e6f9/csu/../csu/libc-start.c:323:0
> #32 0x0000000000af095a _start (/data/sbergman/llvm/inst/bin/clang-6.0+0xaf095a)
> Stack dump:
> 0.	Program arguments: /data/sbergman/llvm/inst/bin/clang-6.0 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name CoinPackedMatrix.cpp -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -coverage-notes-file /data/sbergman/lo-etc/core/workdir/UnpackedTarball/coinmp/CoinUtils/src/.libs/CoinPackedMatrix.gcno -resource-dir /data/sbergman/llvm/inst/lib/clang/6.0.0 -dependency-file .deps/CoinPackedMatrix.Tpo -sys-header-deps -MP -MT CoinPackedMatrix.lo -D HAVE_CONFIG_H -I . -I . -D NDEBUG -D COINUTILS_BUILD -D PIC -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/6.4.1/../../../../include/c++/6.4.1 -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/6.4.1/../../../../include/c++/6.4.1/x86_64-redhat-linux -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/6.4.1/../../../../include/c++/6.4.1/backward -internal-isystem /usr/local/include -internal-isystem /data/sbergman/llvm/inst/lib/clang/6.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wparentheses -Wreturn-type -Wcast-qual -Wall -Wpointer-arith -Wwrite-strings -Wconversion -Wno-unknown-pragmas -Wno-long-long -pedantic-errors -fdeprecated-macro -fdebug-compilation-dir /data/sbergman/lo-etc/core/workdir/UnpackedTarball/coinmp/CoinUtils/src -ferror-limit 19 -fmessage-length 0 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fsized-deallocation -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -enable-newgvn -o .libs/CoinPackedMatrix.o -x c++ CoinPackedMatrix.cpp 
> 1.	<eof> parser at end of file
> 2.	Per-module optimization passes
> 3.	Running pass 'CallGraph Pass Manager' on module 'CoinPackedMatrix.cpp'.
> 4.	Running pass 'Global Value Numbering' on function '@_ZL22CoinTestSortedIndexSetiPKiiPKc'
> clang-6.0: error: unable to execute command: Aborted (core dumped)
> clang-6.0: error: clang frontend command failed due to signal (use -v to see invocation)
> clang version 6.0.0 
> Target: x86_64-unknown-linux-gnu
> Thread model: posix
> InstalledDir: /data/sbergman/llvm/inst/bin

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