<div dir="ltr"><div>I also saw a case last week where the induction variable is <= imax(thing, 4) and it'd be nice to unroll those too.</div><div><br></div><div>--Jason<br></div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Nov 19, 2018 at 12:18 AM Timothy Arceri <<a href="mailto:tarceri@itsqueeze.com">tarceri@itsqueeze.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">This series add support for partial loop unrolling for loops with an<br>
unknown trip count. The new partial_unroll function allows the caller<br>
to specifiy how may times the loop should be unrolled and then the<br>
loop is inserted in the innermost continue branch of the unrolled loop.<br>
<br>
For now we only do partial unrolling for loops where we can guess the<br>
iteration count based on array access that uses an induction variable<br>
as its index (see patch 7).<br>
<br>
Patches 1-6 are tidy-ups/refactors.<br>
<br>
Patch 7 adds a method for guessing the trip count for the loop.<br>
<br>
Patch 8 adds partial unrolling support and also support for removing<br>
redundant load/stores from the remaining loop when considering if<br>
we would be accessing an array out bounds.<br>
<br>
<br>
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</blockquote></div>