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1. Add FullUnrollMaxCount option that works like MaxCount, but also limits the unroll count for fully unrolled loops. So if a loop has an iteration count over this, it won't fully unroll. 2. Add CLI options for MaxCount and the new option, so they can be tested (plus a test). 3. Make partial unrolling obey MaxCount. An example use-case (the out of tree one this is originally designed for) is a target’s TTI can analyze a loop and decide on a max unroll count separate from the size threshold, e.g. based on register pressure, then constrain LoopUnroll to not exceed that, regardless of the size of the unrolled loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265562 91177308-0d34-0410-b5e6-96231b3b80d8 |
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