RFR(S): 8213419: C2 may hang in MulLNode::Ideal()/MulINode::Ideal() with gcc 8.2.1

[Roland Westrelin]

> Nevertheless, I agree with the decision to make everything unsigned.
> It's really to only correct way to do arithmetic in C++ on jints.  I
> wonder if we could redefine a jint type correctly, which is to say it
> had the same behaviour as Java. It'd need overloads for all the
> arithmetic operations.

Thanks for looking at this, Andrew.

Vladimir, are you still ok with the latest webrev?

http://cr.openjdk.java.net/~roland/8213419/webrev.01/

Roland.