Optimal Shuffle Code with Permutation Instructions

@article{Buchwald2015OptimalSC,
  title={Optimal Shuffle Code with Permutation Instructions},
  author={Sebastian Buchwald and Manuel Mohr and Ignaz Rutter},
  journal={ArXiv},
  year={2015},
  volume={abs/1504.07073}
}
During compilation of a program, register allocation is the task of mapping program variables to machine registers. During register allocation, the compiler may introduce shuffle code, consisting of copy and swap operations, that transfers data between the registers. Three common sources of shuffle code are conflicting register mappings at joins in the control flow of the program, e.g, due to if-statements or loops; the calling convention for procedures, which often dictates that input… 
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e k be the edges of the cycle K. First, observe that G − e i is a tree for i = 1, . . . , k. Hence, we can compute each table T G−ei

  • e k be the edges of the cycle K. First, observe that G − e i is a tree for i = 1, . . . , k. Hence, we can compute each table T G−ei