pike.git/ src/ interpret_functions.h

2012-07-22

2012-07-22 14:38:33 by Jonas Walldén <jonasw@roxen.com>

• c0d34d35015aeedf6bdb81f71bc3e1fc24e2b693 (11 lines) (+7/-4) ^{[ Show | Annotate ]}
  Branch: 7.9

Help compiler remove redundant memory accesses in hot locations. (There are
many more like these in interpret_functions.h but a lot is shadowed by
machine-code implementation.) Gives approx. 1-2% improvement on my benchmarks.

497:   });      OPCODE1(F_CLEAR_4_LOCAL, "clear 4 local", 0, { +  struct svalue *locals = Pike_fp->locals;    int e; -  free_mixed_svalues(Pike_fp->locals + arg1, 4); +  free_mixed_svalues(locals + arg1, 4);    for(e = 0; e < 4; e++)    { -  SET_SVAL(Pike_fp->locals[arg1+e], PIKE_T_INT, NUMBER_NUMBER, integer, 0); +  SET_SVAL(locals[arg1+e], PIKE_T_INT, NUMBER_NUMBER, integer, 0);    }   });   
1920:   });      OPCODE2(F_LOCAL_ARROW, "local->x", I_UPDATE_SP, { +  struct pike_frame *fp = Pike_fp;    LOCAL_VAR(struct svalue tmp);    SET_SVAL(tmp, PIKE_T_STRING, 1, string, -  Pike_fp->context->prog->strings[arg1]); +  fp->context->prog->strings[arg1]);    mark_free_svalue (Pike_sp++); -  index_no_free(Pike_sp-1,Pike_fp->locals+arg2, &tmp); +  index_no_free(Pike_sp-1,fp->locals+arg2, &tmp);    print_return_value();   });