IR Diff Visualizer

A small C++ tool for side-by-side visual diffs of IR (MLIR / LLVM-IR / Triton-IR style).

Given two IR files, it:

• Splits them into sections (functions detected via func @..., func ..., llvm.func ...)
• Computes a line-level diff for each section using an LCS-based algorithm
• Renders a dark-themed HTML report with a two-column view: “Old” vs “New”
• Highlights:
  • unchanged lines
  • deleted lines
  • inserted lines
  • replaced lines

Building and Running

Requires a C++17-capable compiler and CMake.

git clone https://github.com/samarthnarang/ir-diff.git
cd ir-diff
mkdir build && cd build
cmake ..
cmake --build .
./ir-diff_cli <old_file.ir> <new_file.ir>  <output_report.html>

Example Usage (with sample files)

# Simple case, default output name to ir_diff.html
./ir-diff_cli ../samples/old.mlir ../samples/new.mlir
# Custom output name
./ir-diff_cli ../samples/old.mlir ../samples/new.mlir ../samples/diff.html

Screenshot