RFR(XS): 8202425: [s390] C2: Wrong unsigned comparison with 0

[Aleksey Shipilev]

On 04/30/2018 04:18 PM, Doerr, Martin wrote:
> compU_reg_imm0. It's used for unsigned comparison with 0, but it's implemented as signed
> comparison.

I am curious. Why do we care about signness when comparing to zero?

> http://cr.openjdk.java.net/~mdoerr/8202425_s390_cmpU0/webrev.00/

Looks good.

-Aleksey

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