GitHub - arsenm/llvm-reduce-tutorial: Demo for using llvm-reduce at EuroLLVM 2025

Branches Tags

Name		Name	Last commit message	Last commit date
Latest commit History 33 Commits
opt-bisect-miscompile-example		opt-bisect-miscompile-example
reduce-llvm-reduce-introducing-unreachable-blocks		reduce-llvm-reduce-introducing-unreachable-blocks
slides		slides
.gitignore		.gitignore
CMakeLists.txt		CMakeLists.txt
README		README
buggy_clang.in		buggy_clang.in
buggy_opt.in		buggy_opt.in
buggy_plugin.cpp		buggy_plugin.cpp
interestingness-O2.sh.in		interestingness-O2.sh.in
interestingness-cleanup-passes.sh.in		interestingness-cleanup-passes.sh.in
interestingness-hang.sh.in		interestingness-hang.sh.in
interestingness-multi-crash-filtered-error-msg-filecheck.sh.in		interestingness-multi-crash-filtered-error-msg-filecheck.sh.in
interestingness-multi-crash-filtered-error-msg.sh.in		interestingness-multi-crash-filtered-error-msg.sh.in
interestingness-multi-crash.sh.in		interestingness-multi-crash.sh.in
interestingness.sh.in		interestingness.sh.in
reduce-pipeline-example.sh.in		reduce-pipeline-example.sh.in

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$ mkdir build; cd build
$ cmake .. -G Ninja -DCMAKE_PREFIX_PATH=/path/to/llvm-project/build -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_PROJECT_SRC=/path/to/llvm-project


When using opt -passes, pass parameter syntax is accepted:

opt --load-pass-plugin=/path/to/plugin -passes='buggy<crash-on-vector>' input.bc

As a clang pass plugin, set BUGGY_PLUGIN_OPTS to the list of pass
parameters. The pass runs as part of the vectorizer pipeline


Some example scripts will be emitted to the build directory