Abstract
“Super Monaco” is a shared-memory multiprocessor implementation of a flat concurrent logic programming language. The system evolved from the earlier Monaco project, and retains, by and large, the Monaco intermediate abstract machine. Over the past two years, the compiler and runtime system were modified, incorporating a number of new features improving robustness, flexibility, maintainability, and performance. The optimizing compiler, written in KL1, takes high-level programs and produces intermediate code for the Monaco abstract machine. An “assembler-assembler” converts a host machine description into a KL1 program which translates Monaco intermediate code into target assembly code. There are currently two intermediate code translators: one for SGI MIPS-based hosts, and another for Sequent 80386-based multiprocessors. This paper discusses the compiler design and our experience building it. A cost/benefit analysis of the compiler optimizations is given, with a comparison to similar systems.
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