This free book is an introductory level text for compiler design courses, that emphasizes problem solving skills. The concepts are clearly presented with sampler problems and diagrams to illustrate the concepts. The text also covers lex and yacc two comp
Introduction Introduction Optimized codeOptimized code Executes faster Executes faster efficient memory usage efficient memory usage yielding better performance. yielding better performance. Compilers can be designed to provide code optimization.Compilers can be designed to provide code optimization. Users should...
The purpose of this text To provide basic knowledge To help us understand the design pattern and module division methods in software engineering A compiler can be regarded as a special software. To give necessary tools and practical experience (In Summer Term) ▫A series of simple examples ▫...
Copy Propagation (cont…) To propagate a copy statement in the form s: x = y, we must: Determine all places where this definition of x is used. For each such use, u: s must be the only definition of x reaching u; and on every path from s to u, there are no assignments to y...
Matrix Addition (complete) #ifdef PARAGUIN ; #pragma paraguin begin_parallel // This barrier is here so that we can take a time stamp // Once we know all processes are ready to go. MPI_Barrier(MPI_COMM_WORLD); #pragma paraguin end_parallel #endif // Take a time stamp gettimeofday(...
Costly Operations : Reduction in Strength Dont call a power function if you can multiply –(x*x vs x^2) Dont multiply when you can shift –(x<<4 vs. 16*x) Optimization11 Reduction in Strength Some sequences of code can be replaced with simpler (or less expensive) sequences. x := ...
Unified Parallel C at LBNL/UCB Analysis for Coalescing Handles multiple loop nests For each array referenced in the loop: -Compute a bounding box (lo, up) of its index value -Handles multiple accesses to the same array (e.g., ar[i] and ar[i+1] get same (lo, up) pair) -Loop bou...