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Compiler Jump Threading

posted by martyb on Monday November 02 2015, @04:31AM   Printer-friendly
from the next-up:-jump-jiving dept.

Phoenix666 writes:

The "jump threading" compiler optimization (aka -fthread-jump) turns conditional into unconditional branches on certain paths at the expense of code size. For hardware with branch prediction, speculative execution, and prefetching, this can greatly improve performance. However, there is no scientific publication or documentation at all. The Wikipedia article is very short and incomplete.

The linked article has an illustrated treatment of common code structures and how these optimizations work.

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  • (Score: 2) by Wootery on Monday November 02 2015, @03:27PM

    by Wootery (2341) on Monday November 02 2015, @03:27PM (#257528)

    Did you miss the word compiler?

    We're talking about the code generated by a C compiler, not C programming patterns. The harm of GOTO doesn't apply here.

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