[ruby-core:87227] [Ruby trunk Bug#14464] MJIT & MinGW / gcc 7.3.0 seemed ok as of 62337, fail or skip after

Issue #14464 has been updated by MSP-Greg (Greg L).

ruby -v changed from ruby 2.6.0dev (2018-02-11 trunk 62371) [x64-mingw32] to ruby 2.6.0dev (2018-05-23 trunk 63492) [x64-mingw32]

@k0kubun,

Just ran with 63492, all passed with 5 skips, partial log:

```
  1) Skipped:
TestJIT#test_compile_insn_getblockparamproxy [C:/Greg/GitHub/ruby/test/ruby/test_jit.rb:89]:
support this in mjit_compile

  2) Skipped:
TestJIT#test_compile_insn_opt_call_c_function [C:/Greg/GitHub/ruby/test/ruby/test_jit.rb:523]:
support this in opt_call_c_function (low priority)

  3) Skipped:
TestJIT#test_compile_insn_reput [C:/Greg/GitHub/ruby/test/ruby/test_jit.rb:246]:
write test

  4) Skipped:
TestJIT#test_compile_insn_tracecoverage [C:/Greg/GitHub/ruby/test/ruby/test_jit.rb:277]:
write test

  5) Skipped:
TestJIT#test_compile_insn_defineclass [C:/Greg/GitHub/ruby/test/ruby/test_jit.rb:281]:
support this in mjit_compile (low priority)

Finished tests in 226.166094s, 0.3228 tests/s, 1.9808 assertions/s.
73 tests, 448 assertions, 0 failures, 0 errors, 5 skips

ruby -v: ruby 2.6.0dev (2018-05-23 trunk 63492) [x64-mingw32]
```

Thanks for your work on this, Greg 

----------------------------------------
Bug #14464: MJIT & MinGW / gcc 7.3.0 seemed ok as of 62337, fail or skip after
https://bugs.ruby-lang.org/issues/14464#change-72216

* Author: MSP-Greg (Greg L)
* Status: Assigned
* Priority: Normal
* Assignee: k0kubun (Takashi Kokubun)
* Target version: 
* ruby -v: ruby 2.6.0dev (2018-05-23 trunk 63492) [x64-mingw32]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
First of all, a thank you to those working on MJIT.

At least three builds of ruby-loco MinGW passed the MJIT tests (62327, 62331, 62337), but after that, the tests have either failed or skipped.  First fail was at 62341.

The most recent build (2018-02-11 trunk 62371), skipped with no timeout error in `jit_supported?`  I haven't looked at patching `test_jit.rb` to see if I can get more info.

I don't know if this is a MinGW issue or a gcc 7.3.0 issue, but, given that it did work for a few builds, I would appreciate it if someone could look into it.  Anything I can help with, I'm happy to.

Thanks, Greg

---Files--------------------------------
TestJIT_info_62380.txt (33.4 KB)
MJIT-MinGW-63333.txt (28.7 KB)


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