Publication

Common Subexpression Elimination in Dotty

Martin Odersky
2015
Reports

Abstract

Common subexpression elimination is a well-known compiler optimisa- tion that improves running time of compiled applications by avoiding the repetition of the same computation. Although it has been implemented on a low level such as bytecode, it misses multiple opportunities that are available on high level, such as optimizing lazy vals. We developed and implemented the transformation for Scala in a new mini-phase in the Dotty Compiler.

Official source

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Martin Odersky
2015
Reports

Abstract

Official source

Related concepts (32)

Scala (programming language)

Scala (ˈskɑːlə ) is a strong statically typed high-level general-purpose programming language that supports both object-oriented programming and functional programming. Designed to be concise, many of Scala's design decisions are aimed to address criticisms of Java. Scala source code can be compiled to Java bytecode and run on a Java virtual machine (JVM). Scala can also be compiled to JavaScript to run in a browser, or directly to a native executable.

High-level programming language

In computer science, a high-level programming language is a programming language with strong abstraction from the details of the computer. In contrast to low-level programming languages, it may use natural language elements, be easier to use, or may automate (or even hide entirely) significant areas of computing systems (e.g. memory management), making the process of developing a program simpler and more understandable than when using a lower-level language. The amount of abstraction provided defines how "high-level" a programming language is.

Bytecode

Bytecode (also called portable code or p-code) is a form of instruction set designed for efficient execution by a software interpreter. Unlike human-readable source code, bytecodes are compact numeric codes, constants, and references (normally numeric addresses) that encode the result of compiler parsing and performing semantic analysis of things like type, scope, and nesting depths of program objects. The name bytecode stems from instruction sets that have one-byte opcodes followed by optional parameters.

Related publications (7)

Common Subexpression Elimination in Dotty

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Logic Synthesis Foundations for Efficient Secure Computation: From Garbled Circuits to Fully Homomorphic Encryption

Verifying Resource Bounds of Programs with Lazy Evaluation and Memoization

Instant Pickles: Generating Object-Oriented Pickler Combinators for Fast and Extensible Serialization