[LLVMbugs] [Bug 18146] New: "Invalid constantexpr cast!" assertion in the ThreadSanitizer pass

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18146

            Bug ID: 18146
           Summary: "Invalid constantexpr cast!" assertion in the
                    ThreadSanitizer pass
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Miscellaneous Instrumentation passes
          Assignee: unassignedbugs at nondot.org
          Reporter: glider at google.com
                CC: dvyukov at google.com, kcc at google.com,
                    llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11669
  --> http://llvm.org/bugs/attachment.cgi?id=11669&action=edit
repro

table.ii is the attached repro.

$ clang++   -pthread  -fPIC   -fsanitize=thread -fPIC  -O2    -c table.ii  -o
table.o 

clang-3.4:
/usr/local/google/home/dtoolsbot/slave/linux-chrome-tsan/build/llvm/lib/IR/Constants.cpp:1448:
static llvm::Constant* llvm::ConstantExpr::getCast(unsigned int,
llvm::Constant*, llvm::Type*): Assertion `CastInst::castIsValid(opc, C, Ty) &&
"Invalid constantexpr cast!"' failed.
0  clang-3.4       0x00000000016be332 llvm::sys::PrintStackTrace(_IO_FILE*) +
34
1  clang-3.4       0x00000000016bd719
2  libpthread.so.0 0x00007fead2529cb0
3  libc.so.6       0x00007fead197e425 gsignal + 53
4  libc.so.6       0x00007fead1981b8b abort + 379
5  libc.so.6       0x00007fead19770ee
6  libc.so.6       0x00007fead1977192
7  clang-3.4       0x00000000014f0db5 llvm::ConstantExpr::getCast(unsigned int,
llvm::Constant*, llvm::Type*) + 581
8  clang-3.4       0x0000000002381548
9  clang-3.4       0x0000000002383bfc
10 clang-3.4       0x000000000159932f
llvm::FPPassManager::runOnFunction(llvm::Function&) + 607
11 clang-3.4       0x000000000159939b
llvm::FPPassManager::runOnModule(llvm::Module&) + 43
12 clang-3.4       0x0000000001598eef
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 927
13 clang-3.4       0x00000000016e454e
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions
const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::Module*,
clang::BackendAction, llvm::raw_ostream*) + 3582
14 clang-3.4       0x00000000016e18cd
15 clang-3.4       0x00000000019fda64 clang::ParseAST(clang::Sema&, bool, bool)
+ 372
16 clang-3.4       0x000000000191c9aa clang::FrontendAction::Execute() + 282
17 clang-3.4       0x00000000018fff30
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 352
18 clang-3.4       0x00000000016c269d
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1693
19 clang-3.4       0x0000000000754ed0 cc1_main(char const**, char const**, char
const*, void*) + 1232
20 clang-3.4       0x0000000000734b29 main + 665
21 libc.so.6       0x00007fead196976d __libc_start_main + 237
22 clang-3.4       0x00000000007520e5
Stack dump:
0.    Program arguments:
/usr/local/google/home/dtoolsbot/slave/linux-chrome-tsan/build/clang_build/bin/clang-3.4
-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name
table.ii -mrelocation-model pic -pic-level 2 -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64
-momit-leaf-frame-pointer -coverage-file
/usr/local/google/home/dtoolsbot/table.o -resource-dir
/usr/local/google/home/dtoolsbot/slave/linux-chrome-tsan/build/clang_build/bin/../lib/clang/3.5
-O2 -fdeprecated-macro -fdebug-compilation-dir /usr/local/google/home/dtoolsbot
-ferror-limit 19 -fmessage-length 134 -fsanitize=thread -pthread -mstackrealign
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -o table.o -x
c++-cpp-output table.ii 
1.    <eof> parser at end of file
2.    Per-module optimization passes
3.    Running pass 'Function Pass Manager' on module 'table.ii'.
4.    Running pass 'ThreadSanitizer' on function '@_ZThn32_N8Builder3D1Ev'
clang-3.4: error: unable to execute command: Aborted (core dumped)
clang-3.4: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.5 (196488)
Target: x86_64-unknown-linux-gnu
Thread model: posix

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