Basic block computing branch (1 résultats)

Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Please note that the content of this book primarily consists of articlesavailable from Wikipedia or other free sources online. In computing, abasic block is code that has one entry point (i.e., no code within it isthe destination of a jump instruction), one exit point and no jumpinstructions contained within it (i.e., a sequence of instructions whichare all executed if the first one in the sequence is executed). Thestart of a basic block may be jumped to from more than one location. Theend of a basic block may be a jump instruction or the statement beforethe destination of a jump instruction. Basic blocks are usually thebasic unit to which compiler optimizations are applied. Basic blocksform the vertices or nodes in a control flow graph. The code may besource code, assembly code or some other sequence of instructions. Moreformally, a sequence of instructions forms a basic block if theinstruction in each position dominates, or always executes before, allthose in later positions, and no other instruction executes between twoinstructions in the sequence. This definition is more general than theintuitive one in some ways. For example, it allows unconditional jumpsto labels not targeted by other jumps.…