JDK-8160748: inconsistent types for ideal_reg

[Yasumasa Suenaga]

Hi all,

We've worked for JDK-8160353 to resolve narrowing conversion error at GCC 6.
------------
/home/ysuenaga/OpenJDK/hs/hotspot/src/share/vm/opto/type.cpp:101:1: error: narrowing conversion of '(uint)Node::NotAMachineReg' from 'uint {aka unsigned int}' to 'int' inside { } [-Werror=narrowing]
  };
  ^
/home/ysuenaga/OpenJDK/hs/hotspot/src/share/vm/opto/type.cpp:101:1: error: narrowing conversion of '(uint)Node::NotAMachineReg' from 'uint {aka unsigned int}' to 'int' inside { } [-Werror=narrowing]
/home/ysuenaga/OpenJDK/hs/hotspot/src/share/vm/opto/type.cpp:101:1: error: narrowing conversion of '(uint)Node::NotAMachineReg' from 'uint {aka unsigned int}' to 'int' inside { } [-Werror=narrowing]
cc1plus: all warnings being treated as errors
------------

Opcodes is defined as enum.
However, a part of code (e.g. NotAMachineReg) is defined as uint.

I think Opcodes related code should consist uint type.

   http://cr.openjdk.java.net/~ysuenaga/JDK-8160748/webrev.00/

I've uploaded webrev for this issue.
I fixed Opcodes type to uint at first, and fixed many errors with GCC 6.

I want to discuss about this.


Thanks,

Yasumasa