RFR: 8211100: hotspot C1 issue with comparing long numbers on x86 32-bit

[Dmitry Cherepanov]

Hello,

Please review a patch that resolves issue in x86 32bit builds. It slightly adjusts the fix for JDK-8201447 (C1 does backedge profiling incorrectly) by creating a copy of the left operand and using it for incrementing backedge counter.

JBS issue: https://bugs.openjdk.java.net/browse/JDK-8211100
webrev: http://cr.openjdk.java.net/~dcherepanov/8211100/webrev.00/

Thanks,

Dmitry