Intel Assembler optimization
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by Søren Haagerup
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Published on 2010-05-01T14:30:54Z
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I'm currently trying to optimize the code emitted from a home-made compiler, for a home-made language.
I've tried out Intel VTune to see where the bottlenecks are: http://www.imada.sdu.dk/~sorenh07/misc/vtune-assembly-optimization.png
I find it very impressive that a "subl"-instruction is responsible for over 38% of the clockticks in a program running for 30-90 seconds! Can anybody give an explanation why?
The "optimization report" feature in VTune apparently doesn't exist for programs not compiled with icc. Does there exist a program which suggests optimization for assembler code? (that is, not code coming from a high-level language).
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