Compiler Support for Advanced Computer Architectures

编译器对高级计算机体系结构的支持编译器对模型微处理器的速度的惊人进步是必不可少的。为了加速程序，编译器和微处理器都识别并隐藏潜在的执行瓶颈。尽管设计良好的存储系统，在最快的位置放置和保存所需的数据是有问题的。本提案将研究一些基于编译器的技术，这些技术可以识别和隐藏或消除各种执行瓶颈：(1)当遇到内存延迟时，可以调用预测预期数据值的技术。这允许在内存延迟期间基于预测值进行计算。在存储延迟期间同时处理多个可能结果值的技术将被研究。这些技术提高了预测的准确性，有效地利用了微型计算机的计算资源。现代微处理器的设计扩展了寄存器（本地存储器）的大小和功能。该方案将改进以前的分配结果，以处理扩展寄存器集。将产生更快、更有效的用户程序。(3)编译器通过识别程序中固定（不变）的计算来提高程序性能。该建议将扩展编译器以处理跨越有限值范围的几乎不变的计算。可以利用未充分利用的计算资源来预测和预先计算这些值。

Compiler Support for Advanced Computer ArchitecturesCompilers are essential to the spectacular advances in the speed of model microprocessors. To acccelerate programs, both compilers and microprocessors identify, and then hide, potential execution bottlenecks. Despite well-designed memory systems, placing and keeping needed data in the fastest locations is problematic. This proposal will investigate a number of compiler-based techniques that identify and hide or eliminate a variety of execution bottlenecks: (1) When memory delays are encountered, techniques that predict expected data values can be invoked. This allows computation based on predicted values during memory delays. Techniques that simultaneously handle of number of possible result values during memory delays will be studied. These techniques enhance the accuracy of predictions, utilizing effectively the computational resources of microcomputers.(2) Modern microprocessor designs extend the size and capabilities of registers (local memory). This proposal will enhance previous allocation results to handle extended register sets. Faster and more effective user programs will result.(3) Compilers improve program performance by identifying computations that are fixed (invariant) within a program. This proposal will extend compilers to handle nearly-invariant computations that span a limited range of values. Underutilized computational resources can be employed to anticipate and precompute such values.