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2010 May 14
3
[LLVMdev] selection dag speedups / llc speedups
...mple, simply switching on "-fast-isel" (roughly 17% drop in code quality for some of my benchmarks) or "-regalloc=local/fast" (roughly 2x slower for some of my benchmarks) is, unfortunately, not an acceptable option. I noticed that a semi-recent commit added the "STATISTIC(NumDAGIselRetries,"Number of times dag isel has to try another path");" as well as a sorting change in DAGISelEmitter.cpp. This suggests to me that there is work being done. Are there other similar efforts, but perhaps aiming for bigger gains, that I should be aware of? From the other end, are there...