[llvm-dev] Conflicts with custom passes

Kihong Heo via llvm-dev llvm-dev at lists.llvm.org
Fri Jun 28 16:21:13 PDT 2019

You are right. Thanks!
I fixed that one as well as some other issues.
I built LLVM-8 with Debug + no-rtti. But it now has the following error:

Stack dump:
0.      Program arguments: clang-8 -cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -disable-free -main-file-name time-1.7.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -coverage-notes-file /home/khheo/project/parametric-symexe/test/toy1/time-1.7.gcno -resource-dir /home/khheo/project/llvm-8/build/lib/clang/8.0.1 -internal-isystem /usr/local/include -internal-isystem /home/khheo/project/llvm-8/build/lib/clang/8.0.1/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O0 -fdebug-compilation-dir /home/khheo/project/parametric-symexe/test/toy1 -ferror-limit 19 -fmessage-length 364 -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -load ../../trace-extractor/build/TracePass.so -o time-1.7.ll -x c /home/khheo/project/all/time-1.7.c -faddrsig
1.      <eof> parser at end of file
2.      Per-module optimization passes
3.      Running pass 'Unnamed pass: implement Pass::getPassName()' on module '/home/khheo/project/all/time-1.7.c'.

What does "Running pass 'Unnamed pass: implement Pass::getPassName()' on module” mean?

- Kihong

> On Jun 28, 2019, at 4:48 PM, Tim Northover <t.p.northover at gmail.com> wrote:
> On Fri, 28 Jun 2019 at 21:18, Kihong Heo <kihong.heo at gmail.com> wrote:
>> When I search for this issue on Google, it seems to be relevant to “RTTI”.
> Yep, that's a typeinfo symbol.
>> But as I know LLVM is built by default -fno-rtti. I also explicitly turned off it. Here is my cmake command:
>> $ cmake -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_RTTI=OFF -DLLVM_ENABLE_PROJECTS=clang -G "Unix Makefiles"  ../llvm
>> Any thought?
> My best guess is that your pass was built *with* RTTI (i.e. no
> -fno-rtti) but LLVM without. A quick fix would be to switch to
> -DLLVM_ENABLE_RTTI=ON, but longer term you may want to look into your
> pass's build system.
> Cheers.
> tim.

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