[PATCH] Estimate DCE effect in heuristic for estimating complete-unroll optimization effects.

[Michael Zolotukhin]

Now to DCE part:)
So, you basically suggest adding all instructions to the 'dead' set and then remove from it instructions that have uses? Is this the idea? If so, I guess we'll end up with what we have now, but on the removal phase - when you remove instruction operands from the set, you also need to remove their operand, and their operands etc. - that's effectively the same linked list traversal as we have now.

There is a high chance that I misunderstood your suggestion here, so please correct me!


http://reviews.llvm.org/D8817

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