7,482 papers · page 311 of 375
Compilers for new machines with 64-bit addresses must generate code that works when the memory used by the program is large. Procedures and global variables are accessed indirectly via global address tables, and calling conventions include code to establish the addressability of …
Determining the relative execution frequency of program regions is essential for many important optimization techniques, including register allocation, function inlining, and instruction scheduling. Estimates derived from profiling with sample inputs are generally regarded as the…
Optimizing compilers (particularly parallel compilers) are constrained by their ability to predict performance consequences of the transformations they apply. Many factors, such as unknowns in control structures, dynamic behavior of programs, and complexity of the underlying hard…
Advanced processor and machine architectures need optimizing compilers to be efficiently programmed in high level languages. Therefore the need for source level debuggers that can handle optimized programs is rising. One difficulty in debugging optimized code arises from the prob…
In this paper we present techniques to find subsets of nodes of a flowgraph that satisfy the following property: A test set that exercises all nodes in a subset exercises all nodes in the flowgraph. Analogous techniques to find subsets of edges are also proposed. These techniques…
We present a simple and powerful type inference method for dynamically typed languages where no type information is supplied by the user. Type inference is reduced to the problem of solvability of a system of type inclusion constraints over a type language that includes function …
Narrowing is the operational principle of languages that integrate functional and logic programming. We propose a notion of a needed narrowing step that, for inductively sequential rewrite systems, extends the Huet and Le´vy notion of a needed reduction step. We define a strategy…
We propose a general definition of higher-order process calculi, generalizing CHOCS [Tho89] and related calculi, and investigate its basic properties. We give sufficient conditions under which a calculus is finitely-branching and effective. We show that a suitable notion of highe…
We develop a compositional proof-system for the partial correctness of concurrent constraint programs. Soundness and (relative) completeness of the system are proved with respect to a denotational semantics based on the notion of strongest postcondition. The strongest postconditi…
This paper discusses call forwarding, a simple interprocedural optimization technique for dynamically typed languages. The basic idea behind the optimization is straightforward: find an ordering for the “entry actions” of a procedure, and generate multiple entry points for the pr…
Using the simple tree attributions described in this paper, attribute values can themselves be trees, enabling attribution to be used for tree transformations. Unlike higher-order attribute grammars, simple tree attributions have the property of descriptional composition, which a…
Modern computer architectures increasingly depend on mechanisms that estimate future control flow decisions to increase performance. Mechanisms such as speculative execution and prefetching are becoming standard architectural mechanisms that rely on control flow prediction to pre…
The standard formulation of bounded quantification, system F≤, is difficult to work with and lacks important syntactic properties, such as decidability. More tractable variants have been studied, but those studied so far either exclude significant classes of useful programs or la…
This paper develops a semantic framework for concurrent languages with value passing. An operation analogous to substitution in the λ-calculus is given, and a semantics is given for a value-passing version of Milner's Calculus of Communicating Systems (CCS). An operational equiva…
Abstract interpretation [7] is a systematic methodology to design static program analysis which has been studied extensively in the logic programming community, because of the potential for optimizations in logic programming compilers and the sophistication of the analyses which …
Heap allocation with copying garbage collection is believed to have poor memory subsystem performance. We conducted a study of the memory subsystem performance of heap allocation for memory subsystems found on many machines. We found that many machines support heap allocation poo…
We describe and prove the correctness of a new concurrent mark-and-sweep garbage collection algorithm. This algorithm derives from the classical on-the-fly algorithm from Dijkstra et al. [9]. A distinguishing feature of our algorithm is that it supports multiprocessor environment…
The notion that a definition of a variable is dead is used by optimizing compilers to delete code whose execution is useless. We extend the notion of deadness to that of partial deadness, and define a transformation, the revival transformation, which eliminates useless executions…
We show that any monad whose unit and extension operations are expressible as purely functional terms can be embedded in a call-by-value language with “composable continuations”. As part of the development, we extend Meyer and Wand's characterization of the relationship between c…
Formal calculi of record structures have recently been a focus of active research. However, scarcely anyone has studied formally the dual notion—i.e., argument-passing to functions by keywords, and its harmonization with currying. We have. Recently, we introduced the label-select…