[LLVMbugs] [Bug 8191] New: Passing -ftrapv causes clang to crash

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8191

           Summary: Passing -ftrapv causes clang to crash
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: anacrolix at gmail.com
                CC: llvmbugs at cs.uiuc.edu


ExpandIntegerResult #0: 0xbf71568: i64,i1 = smulo 0xbf7e5e8, 0xbf7ae08
[ORD=159] [ID=0] dbg:cpfs.c:355:5

Do not know how to expand the result of this operator!
UNREACHABLE executed at LegalizeIntegerTypes.cpp:947!
0  clang     0x09bd75a3
1  clang     0x09bd7330
2            0xb7831400 __kernel_sigreturn + 0
3  libc.so.6 0xb758fa82 abort + 386
4  clang     0x09bac264 llvm::SmallVector<char, 64u>::~SmallVector() + 0
5  clang     0x096aa934
6  clang     0x0965ea98
7  clang     0x09662b88 llvm::SelectionDAG::LegalizeTypes() + 68
8  clang     0x096192b0 llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 1022
9  clang     0x09618a79
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::Instruction
const>, llvm::ilist_iterator<llvm::Instruction const>, bool&) + 219
10 clang     0x0961aa5c
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 1712
11 clang     0x096181b4
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 600
12 clang     0x09754521
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 87
13 clang     0x09b071d5 llvm::FPPassManager::runOnFunction(llvm::Function&) +
313
14 clang     0x09b0738f llvm::FPPassManager::runOnModule(llvm::Module&) + 109
15 clang     0x09b0767a llvm::MPPassManager::runOnModule(llvm::Module&) + 400
16 clang     0x09b07b30 llvm::PassManagerImpl::run(llvm::Module&) + 122
17 clang     0x09b08021 llvm::PassManager::run(llvm::Module&) + 39
18 clang     0x08ba2ee8
19 clang     0x08ba2f73 clang::EmitBackendOutput(clang::Diagnostic&,
clang::CodeGenOptions const&, clang::TargetOptions const&, llvm::Module*,
clang::BackendAction, llvm::raw_ostream*) + 70
20 clang     0x08b9f1d5
21 clang     0x08cf2fd3 clang::ParseAST(clang::Sema&, bool) + 599
22 clang     0x08a85a56 clang::ASTFrontendAction::ExecuteAction() + 254
23 clang     0x08b9ffe9 clang::CodeGenAction::ExecuteAction() + 913
24 clang     0x08a856aa clang::FrontendAction::Execute() + 316
25 clang     0x08a712ac
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 780
26 clang     0x08a2562a
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 787
27 clang     0x08a1931f cc1_main(char const**, char const**, char const*,
void*) + 976
28 clang     0x08a21791 main + 521
29 libc.so.6 0xb7578bd6 __libc_start_main + 230
30 clang     0x08a18a21
Stack dump:
0.    Program arguments: /home/matt/bin/clang -cc1 -triple i386-pc-linux-gnu -S
-disable-free -main-file-name cpfs.c -mrelocation-model static
-mdisable-fp-elim -mconstructor-aliases -target-cpu pentium4
-target-linker-version 2.20.1 -g -resource-dir /home/matt/lib/clang/2.9 -D
_GNU_SOURCE -D _FILE_OFFSET_BITS=64 -D CPFS_SIMD_ALIGNED -D CPFS_USE_SSSE3 -D
FUSE_USE_VERSION=28 -O0 -Wshadow -Wextra -Wmissing-format-attribute -Wall
-Wfloat-equal -Werror-implicit-function-declaration -Werror=return-type
-std=gnu99 -ferror-limit 19 -fmessage-length 80 -ftrapv -fgnu-runtime
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-Sip4s5.s -x c cpfs.c 
1.    <eof> parser at end of file
2.    Code generation
3.    Running pass 'Function Pass Manager' on module 'cpfs.c'.
4.    Running pass 'X86 DAG->DAG Instruction Selection' on function
'@cpfs_load'
clang: error: clang frontend command failed due to signal 6 (use -v to see
invocation)

The line of code it mentions:
assert(geo->bitmap_length * geo->bitmap_density >= geo->data_length);

which becomes

((geo->bitmap_length * geo->bitmap_density >= geo->data_length) ? (void) (0) :
__assert_fail ("geo->bitmap_length * geo->bitmap_density >= geo->data_length",
"cpfs.c", 355, __PRETTY_FUNCTION__));

All 3 variables are of type int64_t.

I can provide any and all other details as required.

-- 
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.