Partial redundancy elimination is a code optimization with a long history of literature and implementation. In practice, its effectiveness depends on issues of naming and code shape. This paper shows that a combination of global reassociation and global value numbering can increase

three are forms of partial redundancy, in that in each case a node computes a value that is already available along at least one of the paths leading to that node. Therefore, an algorithm for partial redundancy elimination also serves to move invariants out of loops, even though the algorithm embodies

Partial redundancy elimination (PRE) techniques play an important role in optimizing compilers. Many optimizations, such as elimination of redundant expressions, communication optimizations, and load-reuse optimizations, employ PRE as an underlying technique for improving the efficiency of a

Partial redundancy elimination (PRE) is a key technology for modern compilers. However

Abstract. Partial redundancy elimination (PRE) is a program transformation that identifies and eliminates expressions that are redundant on at least one (but not necessarily all) execution paths. Global value numbering (GVN) is a program analysis and transformation that identifies operations

Partial redundancy elimination (PRE) is one of the most widespread optimizations in compilers. However, current PRE-techniques are inadequate to handle predicated code, i.e., programs where instructions are guarded by a 1-bit register that dynamically controls whether the e#ect of instruction

Partial redundancy elimination is a subtle optimization which performs common subexpression elimination and expression motion at the same time. In this paper, we use it as an example to promote and demonstrate the scalability of the technology of proof optimization. By this we mean automatic

efficient global optimization algorithms have been developed based on SSA. Among these optimizations are dead store elimination [Cytron et al. 1991], constant propagation [Wegman and Zadeck 1991], value numbering [Alpern et al. 1988; Rosen et al. 1988; Briggs et al. 1997], induction variable analysis

redundancy elimination is among the most powerful compiler optimizations: it performs loop-invariant code motion and common subexpression elimination. We present a type system with optimization component which performs partial redundancy elimination for multi-threaded programs. Key words:

their adequacy for applications, where code size is critical, too, like embedded systems or smart cards. In this article, we demonstrate this by means of partial redundancy elimination (PRE), one of the most powerful und widespread optimizations in contemporay compilers, which intuitively aims at avoiding