Proceedings of the ACM SIGPLAN 1997 conference on Programming language design and implementation
Scalable cross-module optimization
PLDI '98 Proceedings of the ACM SIGPLAN 1998 conference on Programming language design and implementation
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Compiler optimizations play a key role in unlocking the performance of the PA-8000, an innovative dynamically-scheduled machine which is the first implementation of the 64-bit PA 2.0 member of the HP PA-RISC architecture family. This wide superscalar, long out-of-order machine provides significant execution bandwidth and automatically hides latency at runtime; however, despite its ample hardware resources, many of the optimizing transformations which proved effective for the PA-8000 served to augment its ability to exploit the available bandwidth and to hide latency. While legacy codes benefit from the PA-8000's sophisticated hardware, recompilation of old binaries can be vital to realizing the full potential of the PA-8000, given the impact of new compilers in achieving peak performance for this machine.