llvm_tuto

This repo has samples with LLVM/Clang.

It was adopted LLVM 6.0 and the follow packages:

• git
• build-essential
• llvm-6.0-dev
• clang-6.0
• graphviz
• nano

FirstExample

• ex1

  • Install LLVM/Clang
  • Building with Clang
  • Using opt

• ex2

  • Using Common Subexpression Elimination (CSE) from opt

• ex3

  • Using llvm tools: llvm-dis; lli; and llc

FirstPass

• pass_ex
  • Building llvm pass as shared library
  • Running llvm pass with opt
  • Pass to count opcodes per functions using runOnFunction(Function &F)

LoopPass

• pass_countblkloop
  • Building llvm pass as shared library
  • Running llvm pass with opt
  • Pass to count the number of Basic Blocks (BBs) inside each loop using getAnalysis().getLoopInfo()

Parse

• bin_pass
  • Building llvm pass as a binary tool using function main
  • Parse the input LLVM IR file into a module
  • Create a pass manager and fill it with the passes we want to run

utils

• Other llvm passes not classified