run.txt

Build Enzyme:
CC=clang CXX=clang++ cmake .. -DCMAKE_BUILD_TYPE=Debug -DLLVM_DIR=/usr/lib/llvm-13
cmake .. -DLLVM_DIR=/usr/lib/llvm-13

Compile test:
clang-13 -Xclang -load -Xclang /home/leila/Enzyme/enzyme/buildglit/Enzyme/ClangEnzyme-13.so -O2 -flegacy-pass-manager test001.c

/*
  We can generate LLVM from this code by calling clang as follows. 
  Note that clang should be the path to whatever clang you built Enzyme against.

    clang test001.c -S -emit-llvm -o input.ll -O2 -fno-vectorize -fno-slp-vectorize -fno-unroll-loops

  where
    -S -emit-llvm   -> we want to emit LLVM bitcode rather than an executable
    -o input.ll     -> we want the output to be in a file input.ll
    -O2 -ffast-math -> runs optimizations (with fast-math) before we run Enzyme’s AD process
    -fno-vectorize -fno-slp-vectorize -fno-unroll-loops ->
         we don’t want to run vectorization or loop unrolling. 
         It is better for performance to only run these scheduling optimizations after AD.
  Perfoming AD Enzyme:
    opt input.ll -load=/path/to/Enzyme/enzyme/build/Enzyme/LLVMEnzyme-<VERSION>.so -enzyme -o output.ll -S
    
*/

/*

clang test001.c -S -emit-llvm -o input1.ll -O2 -fno-vectorize -fno-slp-vectorize -fno-unroll-loops

opt input1.ll -load=/home/leila/Enzyme/enzyme/build13/Enzyme/ClangEnzyme-13.so -enzyme -o output1.ll -S

opt output1.ll -O2 -o output_opt1.ll -S

clang output_opt1.ll -o a1.exe

./a1.exe

*/

Just a C code:
clang -O2 foo.c