Re: Compiler Loop Unswitching

Tim Frink <plfriko@xxxxxxxx> wrote:

Could you explain what you mean with "first compare"? Maybe you could
provide a small code example?

The comparison on the first iteration of the loop. For example, in:

for (i = 0; i < 10; i++)

You know that i will be 0 and thus < 10 on the first iteration of the
loop, so there's no need to actually test the condition before executing
the loop body.

-Larry Jones

I like Mom to be impressed when I fulfill the least of my obligations.
-- Calvin
.

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