项目作者： goyalankit
项目描述 ：
LLVM optimization passes (DCE, LICM), compilers and stuff
高级语言： C++
项目地址: git://github.com/goyalankit/compilers-and-llvm.git
Compilers and LLVM
- basic-compiler-notes contains course notes from first few lectures from coursera’s course on compilers
- vectorization contains notes on vectorization.
mem-tracing this has been moved to its own repository. ignore this dir.
spring-2014-compilers/assignment1:
- Module pass to print source code line number as comments in LLVM IR using
AssemblyAnnotationWriter class.
spring-2014-compilers/assignment2:
- Function Info pass: that prints function name, argument size, number of call sites, number of basic blocks, number of instructions for a given function.
- LocalOpts Pass: is an transform optimization pass (changes IR). It applies optimizations such as constant folding, strength reduction and algebraic identity.
spring-2014-compilers/assignment3:
- dataflow.h: implements a dataflow framework with virtual methods that can be implemented to forward (reaching definitions) and backward (liveness) analysis.
- Live: pass uses dataflow framework to print live variables above each instruction in IR (SSA form)
- Reach: pass uses dataflow framework to print reaching variables above each instruction in IR (SSA form)
spring-2014-compilers/assignment4:
- DCE: pass performs dead code elimination. It uses dataflow frameword developed in the previous assignment.
- licm: pass that performs loop invariant code motion. It also uses above dataflow framework.
Lessons:
It would be better to implement dataflow framework using function pointers for meet and transfer functions, otherwise you can only use them once if implemented using virtual methods.
