LLVM 3.3 crash on OSX: /bin/sh: line 1: 84249 Floating point exception: 8

[timotheecour]

cd path/to/ldc
git pull
git submodule update --init
mkdir build2
cd build2
ccmake ..
cmake ..
make -j8

[ 51%] Generating std/metastrings.o
[ 51%] /bin/sh: line 1: 84249 Floating point exception: 8 /Users/timothee/shortcuts/git_clone/D/ldc/build2/bin/ldc2 --output-o -c -I/Users/timothee/shortcuts/git_clone/D/ldc/runtime/druntime/src -I/Users/timothee/shortcuts/git_clone/D/ldc/runtime/druntime/src/gc /Users/timothee/shortcuts/git_clone/D/ldc/runtime/phobos/std/file.d -of/Users/timothee/shortcuts/git_clone/D/ldc/build2/runtime/std/file.o -w -d -O3 -release -I/Users/timothee/shortcuts/git_clone/D/ldc/runtime/phobos
make[2]: *** [runtime/std/file.o] Error 136
make[2]: *** Waiting for unfinished jobs....

[timotheecour]

ping ?
this is a real blocker

[timotheecour]

i also tried building ldc using the latest llvm git master :

[ 30%] Generating src/core/thread-debug.o
Assertion failed: (Ty && "Trying to add a type that doesn't exist?"), function addType, file llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp, line 779.
0 ldc2 0x000000010afa8b23 llvm::sys::PrintStackTrace(sFILE) + 51
1 ldc2 0x000000010afa8e8e PrintStackTraceSignalHandler(void) + 30
2 ldc2 0x000000010afa90c0 SignalHandler(int) + 320
3 libsystem_c.dylib 0x00007fff98b4594a sigtramp + 26
4 libsystem_c.dylib 0x00007ff000000000 sigtramp + 1733011152
5 ldc2 0x000000010afa89ef raise + 31
6 ldc2 0x000000010afa8a20 abort + 16
7 ldc2 0x000000010afa8aed assert_rtn + 189
8 ldc2 0x000000010a455f75 llvm::CompileUnit::addType(llvm::DIE, llvm::DIType, unsigned short) + 125
9 ldc2 0x000000010a456573 llvm::CompileUnit::createMemberDIE(llvm::DIDerivedType) + 355
10 ldc2 0x000000010a4552c8 llvm::CompileUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType) + 2574
11 ldc2 0x000000010a45460f llvm::CompileUnit::getOrCreateTypeDIE(llvm::MDNode const) + 475
12 ldc2 0x000000010a455ff2 llvm::CompileUnit::addType(llvm::DIE, llvm::DIType, unsigned short) + 250
13 ldc2 0x000000010a4598b7 llvm::CompileUnit::createGlobalVariableDIE(llvm::MDNode const) + 957
14 ldc2 0x000000010a472a9d llvm::DwarfDebug::beginModule() + 887
15 ldc2 0x000000010a477904 llvm::DwarfDebug::DwarfDebug(llvm::AsmPrinter_, llvm::Module_) + 2270
16 ldc2 0x000000010a4285b9 llvm::AsmPrinter::doInitialization(llvm::Module&) + 1237
17 ldc2 0x000000010aee3efe llvm::FPPassManager::doInitialization(llvm::Module&) + 86
18 ldc2 0x000000010aee7173 llvm::FunctionPassManagerImpl::doInitialization(llvm::Module&) + 301
19 ldc2 0x000000010aee315d llvm::FunctionPassManager::doInitialization() + 59
20 ldc2 0x0000000109578e29 codegenModule(llvm::TargetMachine&, llvm::Module&, llvm::raw_fd_ostream&, llvm::TargetMachine::CodeGenFileType) + 681
21 ldc2 0x0000000109577ace writeModule(llvm::Module_, std::string) + 3470
22 ldc2 0x00000001095879bb main + 16779
23 libdyld.dylib 0x00007fff912ce7e1 start + 0
24 libdyld.dylib 0x000000000000000b start + 1859328042
/bin/sh: line 1: 75813 Illegal instruction: 4 ldc/build5/bin/ldc2 --output-o -c -ldc/runtime/druntime/src -Ildc/runtime/druntime/src/gcldc/runtime/druntime/src/core/thread.d -ofldc/build5/runtime/src/core/thread-debug.o -w -d -g -disable-invariants
make[2]: *_* [runtime/src/core/thread-debug.o] Error 132
make[1]: *** [runtime/CMakeFiles/druntime-ldc-debug.dir/all] Error 2

[timotheecour]

update: ok it compiles and runs with llvm 3.2, not 3.3

[timotheecour]

reopening because it should be made to work on 3.3

[redstar]

I am working on the LLVM 3.4 issue. They introduced new functionality and extended the checks on debug info which leads to this crash.
I am not sure if can do anything about the OSX problem because I don't have an OSX box.

[timotheecour]

please don't neglect OSX users :) !

[dnadlinger]

@timotheecour: On OS X, LDC will never run on LLVM 3.3, because of a regression the LLVM team deliberately chose to leave unfixed: http://llvm.org/bugs/show_bug.cgi?id=15972

Of course, once it became obvious that this also affects Clang (I guess I should have spelt that out explicitly), they fixed it, but…

[dnadlinger]

Also added that piece of information to the "Building from source" page. Do you think it makes sense to add checks for known bad versions to CMake?

[timotheecour]

yes, until it's fixed. Took me some time to figure out it was because I was using 3.3 instead of 3.2.

Also, seems like they DID fix it in that thread you mentioned, so can LDC run

• on 3.3?
• on 3.4?

[dnadlinger]

Nope, the fix was done after the 3.3 release (Clang also shipped with the regression, and it turns out that people have thread-local statics in C++ templates too…). I don't know a reason why LLVM trunk shouldn't work in theory, but then again, API changes are pretty frequent, and there still seems be an issue concerning debug info (https://travis-ci.org/ldc-developers/ldc/jobs/10686173).

[dnadlinger]

Also, regarding "until it's fixed": As far as I am aware, there are are no point releases of LLVM, so this is never going to get fixed in LLVM 3.3.

[redstar]

There is ongoing work to prepare a LLVM 3.3.1 release. But I don't know if this particular problem is fixed in this release.