Power leakage constitutes an increasing fraction of the total power consumption in modern semiconductor technologies. Recent research efforts also indicate architecture, compiler, and software participations can help reduce the switching activities (also known as dynamic power) on microprocessors. This raises interests on the issues to employ architecture and compiler efforts to reduce leakage ...

Translation validation was introduced as a technique to formally verify the correctness of code generators that attempts to verify that program transformations preserve the semantics. In this work, we adopt this approach to formally verify that the clock semantics is preserved during the transformations of a synchronous data-flow compiler. We represent the clock semantics of a program and its t...

My current interests span programming languages, compilers and computer systems, with emphasis on program optimization. Contrary to accepted views, the area of program optimization is broad, multifaceted, almost interdisciplinary. Its spectrum extends from compiler optimization to the more experimental processor architecture and to the more formally treated program specialization. While my thes...

Performance tuning improves a compiler s performance by detecting errors and missed opportunities in its analysis optimization and code generation stages Normally a com piler s author tunes it by examining the generated code to nd suboptimal code sequences This paper describes a collection of tools called compiler auditors that assist a compiler writer by partially mechanizing the process of nd...

Much work has been done in verifying a compiler specification, both in hand-written and mechanical proofs. However, there is still a gap between a correct compiler specification and a correct compiler implementation. To fill this gap and obtain a correct compiler implementation, we take the approach of generating a compiler from its specification. We verified the correctness of a compiler speci...

This article describes the smart recompilation in a compiler for the XE programming language. XE is a data abstraction language that resembles Clu. The problem of smart recompilation consists of the detection of the program units that must be recompiled after a change to some program unit and the detection of compilation order for those program units. The recompilation algorithms of the XE comp...

We introduce program reconditioning, a method for allowing generation and differential testing to be used find miscompilation bugs, test-case reduction simplify bug-triggering programs, even when (a) the programming language of interest features undefined behaviour (UB) (b) no tools exist detect avoid this UB. present two based on our reconditioning idea: GLSLsmith OpenGL Shading Language (GLSL...

We present a Haskell library that makes it easy for compiler writers to implement program transformations based on dataflow analyses. The compiler writer must identify (a) a family of logical assertions on which the transformation will be based; (b) an approximate representation of such assertions, which must have a lattice structure such that every assertion can be increased at most finitely m...