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...llocLinearScan.cpp should be the best place to start learning LLVM from. linearscan gives the best results among LLVM's allocators so it also should be the first allocator to compete with :) If you think about better register allocator I'd suggest you to look at http://citeseer.ist.psu.edu/kong98precise.html and find a paper of Sid-Ahmed-Ali Touati named "Register Saturation in Instruction Level Parallelism". These works propose faster and better algorithms than graph coloring, at least as I understand it. Best regards, Anton. -------------- next part -------------- An HTML attachment w...

Toward a better register allocator, I'm attempting to understand the dataflow information available to the allocator. What's the difference between LiveInterval information and LiveVariable information? If a LiveInterval is based on a linear ordering of the machine instructions, isn't it rather conservative in nature? Let's say I have a typical diamond CFG: A

...d be the best place to start learning LLVM from. > linearscan gives the best results among LLVM's allocators so it also should > be the first allocator to compete with :) > > If you think about better register allocator I'd suggest you to look at > http://citeseer.ist.psu.edu/kong98precise.html and find a paper of > Sid-Ahmed-Ali Touati named "Register Saturation in Instruction Level > Parallelism". These works propose faster and better algorithms than graph > coloring, at least as I understand it. > > Best regards, > Anton. >