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Loop fusion : ウィキペディア英語版
Loop fusion

In computer science, loop fusion (or loop jamming) is a compiler optimization and loop transformation which replaces multiple loops with a single one. It is possible when two loops iterate over the same range and do not reference each other's data.
Loop fusion does not always improve run-time speed. On some architectures, two loops may actually perform better than one loop because, for example, there is increased data locality within each loop. In these cases, a single loop may be transformed into two, which is called loop fission.
== Example in C ==


int i, a(), b();
for (i = 0; i < 100; i++)
a() = 1;
for (i = 0; i < 100; i++)
b() = 2;

is equivalent to:

int i, a(), b();
for (i = 0; i < 100; i++)




抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Loop fusion」の詳細全文を読む



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