LibJS: Emit bytecode for function declaration instantiation

[kalenikaliaksandr]

By doing that all instructions required for instantiation are emitted once in compilation and then reused for subsequent calls, instead of running generic instantiation process for each call.

[kalenikaliaksandr]

Benchmark results are mostly not affected by this change, but it moves us closer to some more useful Call optimizations by fixing following things:

• Default parameters are no longer need separate executables which means we are closer to having 1:1 relationship between executables and execution contexts.
• Getting rid of VM::binding_initialization() removes some execute_ast_node() calls (leftover from AST interpreter)

Suite       Test                                   Speedup  Old (Mean ± Range)        New (Mean ± Range)
----------  -----------------------------------  ---------  ------------------------  ------------------------
Kraken      ai-astar.js                              1.014  1.875 ± 1.870 … 1.880     1.850 ± 1.810 … 1.890
Kraken      audio-beat-detection.js                  0.975  1.350 ± 1.340 … 1.360     1.385 ± 1.380 … 1.390
Kraken      audio-dft.js                             1.037  1.115 ± 1.100 … 1.130     1.075 ± 1.060 … 1.090
Kraken      audio-fft.js                             1.004  1.235 ± 1.230 … 1.240     1.230 ± 1.230 … 1.230
Kraken      audio-oscillator.js                      0.979  1.370 ± 1.330 … 1.410     1.400 ± 1.390 … 1.410
Kraken      imaging-darkroom.js                      0.941  1.820 ± 1.820 … 1.820     1.935 ± 1.740 … 2.130
Kraken      imaging-desaturate.js                    0.991  1.700 ± 1.700 … 1.700     1.715 ± 1.710 … 1.720
Kraken      imaging-gaussian-blur.js                 1.051  8.045 ± 7.820 … 8.270     7.655 ± 7.460 … 7.850
Kraken      json-parse-financial.js                  1      0.115 ± 0.110 … 0.120     0.115 ± 0.110 … 0.120
Kraken      json-stringify-tinderbox.js              1.02   0.255 ± 0.250 … 0.260     0.250 ± 0.250 … 0.250
Kraken      stanford-crypto-aes.js                   0.983  0.585 ± 0.580 … 0.590     0.595 ± 0.590 … 0.600
Kraken      stanford-crypto-ccm.js                   1.021  0.480 ± 0.480 … 0.480     0.470 ± 0.470 … 0.470
Kraken      stanford-crypto-pbkdf2.js                1.016  0.935 ± 0.930 … 0.940     0.920 ± 0.900 … 0.940
Kraken      stanford-crypto-sha256-iterative.js      1      0.380 ± 0.380 … 0.380     0.380 ± 0.380 … 0.380
Octane      box2d.js                                 0.858  2.145 ± 2.140 … 2.150     2.500 ± 2.490 … 2.510
Octane      code-load.js                             1.016  2.175 ± 2.170 … 2.180     2.140 ± 2.140 … 2.140
Octane      crypto.js                                0.988  6.120 ± 6.020 … 6.220     6.195 ± 6.130 … 6.260
Octane      deltablue.js                             0.995  2.020 ± 2.010 … 2.030     2.030 ± 2.030 … 2.030
Octane      earley-boyer.js                          1.063  15.645 ± 15.510 … 15.780  14.715 ± 14.690 … 14.740
Octane      gbemu.js                                 1.002  2.540 ± 2.540 … 2.540     2.535 ± 2.510 … 2.560
Octane      mandreel.js                              1.019  11.840 ± 11.840 … 11.840  11.620 ± 11.480 … 11.760
Octane      navier-stokes.js                         0.99   3.115 ± 3.090 … 3.140     3.145 ± 3.060 … 3.230
Octane      pdfjs.js                                 1.008  2.580 ± 2.580 … 2.580     2.560 ± 2.550 … 2.570
Octane      raytrace.js                              1.093  6.115 ± 6.100 … 6.130     5.595 ± 5.540 … 5.650
Octane      regexp.js                                0.999  18.485 ± 18.400 … 18.570  18.505 ± 18.400 … 18.610
Octane      richards.js                              1      2.010 ± 2.010 … 2.010     2.010 ± 2.010 … 2.010
Octane      splay.js                                 1.004  2.680 ± 2.670 … 2.690     2.670 ± 2.660 … 2.680
Octane      typescript.js                            1.031  31.195 ± 31.140 … 31.250  30.245 ± 30.190 … 30.300
Octane      zlib.js                                  1.012  85.765 ± 85.590 … 85.940  84.710 ± 84.580 … 84.840
Kraken      Total                                    1.014  21.260                    20.975
Octane      Total                                    1.017  194.430                   191.175
All Suites  Total                                    1.017  215.690                   212.150