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Simon Peyton Jones authored
This patch is the result of a long series of nofib-based experiments to improve GHC's inlining heuristics. In the end, I'm not sure how worthwhile it all was: I only got a 1% decrease in code size 1% decrease in allocation and I don't trust the runtime statistics enough to quote. Still, in doing all this I tidied up the code quite a bit, and I understand it much better now, so I'm going to commit it. The main changes are in CoreUnfold, which has lots of new comments. Other changes: - litSize moves from Literal to CoreUnfold - interestingArg moves from SimplUtils to CoreUnfold - the default unfolding threshold (in StaticFlags) reduces from 8 to 6 (since the size calculation has changed a bit)
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