This patch fixes heuristic in loop array prefetching to use "round-to-nearest" instead of "floor", which is what _all_ other similar heuristics in the pass are doing.
This subtle change allows a critical loop in 429.mcf to get prefetches without making the pass too aggressive, which causes regressions on other benchmarks. Bootstrapped and regtested on x86_64-linux-gnu and aarch64-linux-gnu. -- Maxim Kuvyrkov www.linaro.org
0003-Fix-prefetch-heuristic-calculation.patch
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