# laf-intel instrumentation

## Usage

By default the passes will not run when you compile programs using 
afl-clang-fast. Hence, you can use AFL as usual.
To enable the passes you must set environment variables before you
compile the target project.

The following options exist:

`export AFL_LLVM_LAF_SPLIT_SWITCHES=1`

Enables the split-switches pass.

`export AFL_LLVM_LAF_TRANSFORM_COMPARES=1`

Enables the transform-compares pass (strcmp, memcmp, strncmp, strcasecmp, strncasecmp).

`export AFL_LLVM_LAF_SPLIT_COMPARES=1`

Enables the split-compares pass.
By default it will split all compares with a bit width <= 64 bits.
You can change this behaviour by setting `export AFL_LLVM_LAF_SPLIT_COMPARES_BITW=<bit_width>`.