HELP! * GREY=local LOCAL HTML version of Foils prepared Jan 12 1997

Foil 6 Register and Stack Allocation

From Optimizing Java Java for CSE Meeting -- Dec 16 1996. by Zoran Budimlic * See also color IMAGE
Java doesn't have registers
local variables are not the same:
  • first 4 (R0-R3) have shorter manipulating instructions
  • first 64 can fit into the register set on UltraJavaTM
operand stack should be used to shorten the bytecode sequence
  • solved in code generation for p-code

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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