This video explores the ongoing development and improvements in HotSpot C2's auto vectoriser. After a brief introduction to the SuperWord algorithm, the presenter delves into significant enhancements already achieved and outlines plans for future ad…

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HotSpot's C2 compiler auto-vectorization capabilities are being enhanced through improvements to the SuperWord algorithm. Key developments include better dependency graph management, advanced aliasing analysis for safe memory operations, improved cost modeling for vectorization profitability, and strategies to prevent performance regressions from memory access issues. Future goals include if-conversion, efficient scan operations, more robust algorithms, and support for larger loop bodies.

Auto-Vectorization in HotSpot #JVMLS – Inside.java