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Unformatted text preview: uced the overhead of procedure calls and eliminated some of the critical “optimization blockers” that cause difficulties for optimizing compilers. As we seek to push the performance further, we must begin to consider optimizations that make more use of the means by which processors execute instructions and the capabilities of particular processors. Getting every last bit of performance requires a detailed analysis of the program as well as code generation tuned for the target processor. Nonetheless, we can apply some basic optimizations that will yield an overall performance improvement on a large class of processors. The detailed performance results we report here may not hold for other machines, but the general principles of operation and optimization apply to a wide variety of machines. To understand ways to improve performance, we require a simple operational model of how modern processors work. Due to the large number of transistors that can be integrated onto a single chip, mod...
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