[PATCH] D25963: [LoopUnroll] Implement profile-based loop peeling

[Gerolf Hoflehner via llvm-commits]

Gerolf added a reviewer: anemet.
Gerolf added inline comments.


================
Comment at: lib/Transforms/Utils/LoopUnrollPeel.cpp:47
+    cl::desc("Force a peel count regardless of profiling information."));
+
+// Check whether we are capable of peeling this loop.
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Please add an option to turn it off by default.


================
Comment at: lib/Transforms/Utils/LoopUnrollPeel.cpp:125
+                            ValueToValueMapTy &LVMap, LoopInfo *LI) {
+
+  BasicBlock *Header = L->getHeader();
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Could this be implemented as
- distribute k: N-k (assuming trip count N)
- complete unroll first k iterations?


https://reviews.llvm.org/D25963