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ruby--ruby/tool/ruby_vm
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k0kubun 9b6b4674d7 Recompile JIT-ed code without optimization 
based on inline cache when JIT cancel happens by that.

This feature was in the original MJIT implementation by Vladimir, but on
merging MJIT to Ruby it was removed for simplification. This commit adds
the functionality again for the following benchmark:

52f05781f6/concurrent-map/bench.rb
(shown float is duration seconds. shorter is better)

* Before
```
$ INHERIT=0 ruby -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) [x86_64-linux]
--
1.6507579649914987

$ INHERIT=0 ruby -v --jit bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) +JIT [x86_64-linux]
--
1.5091587850474752

$ INHERIT=1 ruby -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) [x86_64-linux]
--
1.6124781150138006

$ INHERIT=1 ruby --jit -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) +JIT [x86_64-linux]
--
1.7495657080435194 # <-- this
```

* After
```
$ INHERIT=0 ruby -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) [x86_64-linux]
last_commit=Recompile JIT-ed code without optimization
--
1.653559010999743

$ INHERIT=0 ruby --jit -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) +JIT [x86_64-linux]
last_commit=Recompile JIT-ed code without optimization
--
1.4738391840364784

$ INHERIT=1 ruby -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) [x86_64-linux]
last_commit=Recompile JIT-ed code without optimization
--
1.645227018976584

$ INHERIT=1 ruby --jit -v bench.rb
ruby 2.7.0dev (2019-04-13 trunk 67523) +JIT [x86_64-linux]
last_commit=Recompile JIT-ed code without optimization
--
1.523708809982054 # <-- this
```

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-14 04:52:02 +00:00
..
controllers delete emacs mode lines [ci skip] 2018-12-27 06:12:09 +00:00
helpers vm.inc now in C99 2019-01-25 14:09:10 +00:00
loaders delete emacs mode lines [ci skip] 2018-12-27 06:12:09 +00:00
models vm.inc now in C99 2019-01-25 14:09:10 +00:00
scripts delete emacs mode lines [ci skip] 2018-12-27 06:12:09 +00:00
tests new insns.def format (2nd try) 2018-01-12 08:38:07 +00:00
views Recompile JIT-ed code without optimization 2019-04-14 04:52:02 +00:00