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Posted to commits@tvm.apache.org by "jchia (via GitHub)" <gi...@apache.org> on 2024/03/12 13:02:36 UTC
[I] [Docs] What versions of LLVM exactly to use? [tvm]
jchia opened a new issue, #16708:
URL: https://github.com/apache/tvm/issues/16708
### Install from Source
The page at https://tvm.apache.org/docs/install/from_source.html says this about LLVM:
> We highly recommend to build with LLVM to enable all the features.
### Additions/Changes Requested
But I cannot figure out which versions of LLVM are acceptable. On Ubuntu 20.04, I have clang-12 and llvm-12-dev installed from the official Ubuntu focal-updates repo, as well as clang-19 and libpolly-19-dev installed from `http://apt.llvm.org/focal/ llvm-toolchain-focal main`.
In my config.cmake, I tried setting `USE_LLVM` to `/usr/lib/llvm-12/bin/llvm-config` and `/usr/lib/llvm-19/bin/llvm-config`. Neither worked.
With 12:
```
/home/jchia/gh/tvm/src/target/llvm/llvm_module.cc:502:38: error: ‘x86’ is not a namespace-name
502 | using namespace llvm::sys::detail::x86;
```
With 19:
```
FAILED: CMakeFiles/tvm_objs.dir/src/target/llvm/llvm_instance.cc.o
ccache /usr/bin/c++ -DDMLC_USE_FOPEN64=0 -DDMLC_USE_LOGGING_LIBRARY="<tvm/runtime/logging.h>" -DNDEBUG -DNDEBUG=1 -DTVM_GRAPH_EXECUTOR_TENSORRT -DTVM_INDEX_DEFAULT_I64=1 -DTVM_KALLOC_ALIGNMENT=64 -DTVM_LLVM_VERSION=190 -DTVM_THREADPOOL_USE_OPENMP=0 -DTVM_USE_LIBBACKTRACE=1 -DUSE_FALLBACK_STL_MAP=0 -DUSE_MICRO_STANDALONE_RUNTIME=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -DDMLC_ENABLE_RTTI=0 -I/home/jchia/gh/tvm/include -I/home/jchia/gh/tvm/build/libbacktrace/include -I/home/jchia/gh/tvm/3rdparty/libcrc/include -isystem /home/jchia/gh/tvm/3rdparty/dlpack/include -isystem /home/jchia/gh/tvm/3rdparty/dmlc-core/include -isystem /home/jchia/gh/tvm/3rdparty/rang/include -isystem /home/jchia/gh/tvm/3rdparty/compiler-rt -isystem /home/jchia/gh/tvm/3rdparty/picojson -isystem /home/jchia/gh/tvm/build/crt_config -isystem /usr/local/cuda/include -isystem /usr/lib/llvm-19/include -std=c++17 -faligned-new -O2 -Wall -fPIC -fno-rtti -MD -MT CMakeFiles/t
vm_objs.dir/src/target/llvm/llvm_instance.cc.o -MF CMakeFiles/tvm_objs.dir/src/target/llvm/llvm_instance.cc.o.d -o CMakeFiles/tvm_objs.dir/src/target/llvm/llvm_instance.cc.o -c /home/jchia/gh/tvm/src/target/llvm/llvm_instance.cc
/home/jchia/gh/tvm/src/target/llvm/llvm_instance.cc:45:10: fatal error: llvm/Support/Host.h: No such file or directory
45 | #include <llvm/Support/Host.h>
```
Could you clarify:
- Which versions of LLVM can be used.
- Why exactly LLVM is good/necessary, namely which features are affected if LLVM is not used.
- Whether this part is referring to the `USE_LLVM` in the config.cmake or something else. E.g. do we need to do something about and `CMAKE_C_COMPILER` or `CMAKE_CXX_COMPILER` to point them to clang?
### Triage
* needs-triage
* docs
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "cbalint13 (via GitHub)" <gi...@apache.org>.
cbalint13 commented on issue #16708:
URL: https://github.com/apache/tvm/issues/16708#issuecomment-2645947133
Starting with PR https://github.com/apache/tvm/pull/17631 , LLVM should compile on {10,11,12,13,14,15,16,17,18,19,20} .
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "tqchen (via GitHub)" <gi...@apache.org>.
tqchen closed issue #16708: [Docs] What versions of LLVM exactly to use?
URL: https://github.com/apache/tvm/issues/16708
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "tqchen (via GitHub)" <gi...@apache.org>.
tqchen commented on issue #16708:
URL: https://github.com/apache/tvm/issues/16708#issuecomment-2645736928
we close the issue due to the staleness, the latest llvm18 should work
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "chensterliu (via GitHub)" <gi...@apache.org>.
chensterliu commented on issue #16708:
URL: https://github.com/apache/tvm/issues/16708#issuecomment-2455233466
I met the same error for combination of (TVM v0.15.0, llvm-18). Upgrade tvm and compile TVM v0.18.0 with llvm-18 works fine for me.
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "tqchen (via GitHub)" <gi...@apache.org>.
tqchen closed issue #16708: [Docs] What versions of LLVM exactly to use?
URL: https://github.com/apache/tvm/issues/16708
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "jchia (via GitHub)" <gi...@apache.org>.
jchia commented on issue #16708:
URL: https://github.com/apache/tvm/issues/16708#issuecomment-1991678210
From the llvm github repo, it appears that llvm-17 has `llvm/Support/Host.h` but llvm-18 and llvm-19 do not.
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Re: [I] [Docs] What versions of LLVM exactly to use? [tvm]
Posted by "jchia (via GitHub)" <gi...@apache.org>.
jchia commented on issue #16708:
URL: https://github.com/apache/tvm/issues/16708#issuecomment-2644497909
This is not even a feature request. There is nothing to "not plan". The issue is just a request for clarification about which LLVM versions exactly are needed.
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