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:

https://github.com/benchmark-driver/misc/blob/52f05781f65467baf895bf6ba79d172c9b0826fd/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

1 files changed, 3 insertions, 2 deletions

diff --git a/test/ruby/test_jit.rb b/test/ruby/test_jit.rb
index 0079741a04..50bfcefac7 100644
--- a/test/ruby/test_jit.rb
+++ b/test/ruby/test_jit.rb
@@ -10,6 +10,7 @@ class TestJIT < Test::Unit::TestCase
   include JITSupport
 
   IGNORABLE_PATTERNS = [
+    /\AJIT recompile: .+\n\z/,
     /\ASuccessful MJIT finish\n\z/,
   ]
 
@@ -529,7 +530,7 @@ class TestJIT < Test::Unit::TestCase
     end;
 
     # send call -> optimized call (send JIT) -> optimized call
-    assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: '122', success_count: 1, min_calls: 2)
+    assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: '122', success_count: 2, min_calls: 2)
     begin;
       obj = Object.new
       def obj.[](h)
@@ -704,7 +705,7 @@ class TestJIT < Test::Unit::TestCase
   end
 
   def test_inlined_undefined_ivar
-    assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: "bbb", success_count: 2, min_calls: 3)
+    assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: "bbb", success_count: 3, min_calls: 3)
     begin;
       class Foo
         def initialize