Ali-Reza Adl-Tabatabai, Michal Cierniak, Guei-Yuan Lueh, Vishesh M. Parikh, J. Stichnoth
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引用次数: 206
摘要
“即时”(JIT) Java编译器在程序执行期间从Java字节码指令生成本机代码。因此，在Java JIT编译器中，编译速度比在传统编译器中更为重要，这就要求优化算法是轻量级和有效的。我们介绍了一个用于Intel架构的Java JIT编译器的结构，描述了JIT编译器优化的轻量级实现(例如，消除公共子表达式、寄存器分配和消除数组边界检查)，并评估了优化的性能优势和权衡。这个JIT编译器已经随Intel的VTune for Java产品的2.5版一起发布了。
Fast, effective code generation in a just-in-time Java compiler
A "Just-In-Time" (JIT) Java compiler produces native code from Java byte code instructions during program execution. As such, compilation speed is more important in a Java JIT compiler than in a traditional compiler, requiring optimization algorithms to be lightweight and effective. We present the structure of a Java JIT compiler for the Intel Architecture, describe the lightweight implementation of JIT compiler optimizations (e.g., common subexpression elimination, register allocation, and elimination of array bounds checking), and evaluate the performance benefits and tradeoffs of the optimizations. This JIT compiler has been shipped with version 2.5 of Intel's VTune for Java product.
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