Invoke refactoring

[chfast]

Depends on #602.

[codecov]

Codecov Report

Merging #564 (d43e3af) into optimize_call_result_push (90bd063) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@                    Coverage Diff                     @@
##           optimize_call_result_push     #564   +/-   ##
==========================================================
  Coverage                      99.27%   99.28%           
==========================================================
  Files                             86       86           
  Lines                          13219    13218    -1     
==========================================================
  Hits                           13123    13123           
+ Misses                            96       95    -1     

Flag	Coverage Δ
rust	98.67% <ø> (+0.09%)	⬆️
spectests	89.97% <100.00%> (-0.01%)	⬇️
unittests	99.21% <100.00%> (-0.01%)	⬇️
unittests-32	99.31% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lib/fizzy/execute.cpp	99.29% <100.00%> (-0.01%)	⬇️
bindings/rust/src/lib.rs	98.95% <0.00%> (+0.09%)	⬆️

[axic]

Rebased on top of #602. Can be benchmarked too.

[axic]

@chfast maybe this with #602 would be measurable saving? It removes the passing of func_type.

[chfast]

@chfast maybe this with #602 would be measurable saving? It removes the passing of func_type.

Yes. This was main goal.

[axic]

Rebased. If we want to keep the assertion from #602, then need the last commit, which likely negates all the benefits.