Tracing the Meta-Level: PyPy's Tracing JIT Compiler

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Applying a Tracing JIT to an Interpreter Applying Hints ◮ green variables: should be considered as part of the program counter by the jit ◮ red variables: not important for the program counter ◮ jit_merge_point: put at the beginning of the bytecode dispatch loop ◮ can_enter_jit: marks the backward jump
Applying a Tracing JIT to an Interpreter Applying Hints Example def interpret ( bytecode , a ): regs = [0] * 256 pc = 0 while True : tlrjitdriver . jit_merge_point () opcode = ord ( bytecode [ pc ]) pc += 1 if opcode == JUMP_IF_A : target = ord ( bytecode [ pc ]) pc += 1 if a: if target < pc : tlrjitdriver . can_enter_jit () pc = target elif opcode == MOV_A_R : ... # rest unmodified
Page 1 and 2: Tracing the Meta-Level: PyPy's Trac
Page 3 and 4: Introduction What We want to do ◮
Page 5 and 6: The PyPy project Advantages for wri
Page 7 and 8: Tracing JIT compilers ◮ initially
Page 9 and 10: Tracing JIT compilers What should b
Page 11 and 12: Tracing JIT compilers Tracing JIT P
Page 13 and 14: Applying a Tracing JIT to an Interp
Page 19: Applying a Tracing JIT to an Interp
Page 23 and 24: Improving the Result II ◮ if oper
Page 25 and 26: Implementation issues II ◮ on fai
Page 27 and 28: Evaluation PyPy ◮ PyPy with JIT i
Page 29 and 30: Related Work Piumarta and Riccardi
Page 31 and 32: Related Work Partial Evaluation ◮
Page 33 and 34: Related Work Dynamic Partial Evalua

Tracing the Meta-Level: PyPy's Tracing JIT Compiler

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