Pointer-Integer Round Trip Remover

March 11, 2025 · View on GitHub

is an out-of-tree LLVM pass that collapses instances of pointer-integer round-trips into a single GEP (get element pointer) instruction.

Warning

This optimization cannot always be done. Certain strict semantics such as pointer provenance make this kind of thing illegal. However, we can get this translation to verify with physical pointers.

Building & Running

To build the pass:

export $LLVM_DIR=<path/to/llvm/19>

cmake .
make

To run:

$LLVM_DIR/bin/opt -load-pass-plugin libPtrIntRoundTripRemover.so --passes="ptr-int-round-trip-remover" -disable-output inputs/simple.ll