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llvm-hs / homebrew-llvm

LLVM formulae for the Homebrew package manager
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`Constant::signExtend` crash LLVM-13 on M1 Monterey #22

Open ganler opened 2 years ago

ganler commented 2 years ago

I am developing a new pass using LLVM-13 from Homebrew and I got a strange bug that whenever I call Constant::signExtend the pass crashes with opt invoked. However, when I use Linux x64 (also LLVM-14) it is not an issue. I did not find any recent commit on LLVM's Constant::signExtend so I guess it is either related to Homebrew or M1?

To reproduce this bug:

git clone git@github.com:ganler/mini-kint.git
mkdir -p mini-kint/build
cd mini-kint/build
export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
cmake .. -DLLVM_DIR=/opt/homebrew/opt/llvm/lib/cmake/llvm -DCMAKE_CXX_COMPILER=$(which clang++) -DCMAKE_C_COMPILER=$(which clang) -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DCMAKE_BUILD_TYPE=Debug

make -j8

Create a file a.c

#include <stdint.h>

size_t __mkint_ann_malloc_array_nc(uint8_t n, uint8_t size) { return n * size; }
clang -O0 -Xclang -disable-O0-optnone -emit-llvm -S a.c
opt -load-pass-plugin=mkint/MiniKintPass.dylib -passes=mkint-pass -S a.ll
# crash
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