[8] RFR (XXS): 8022395: java.util.zip.ZipException: Not in GZIP format in JT_JDK/test/java/util/zip/GZIP tests

[Christian Thalinger]

https://bugs.openjdk.java.net/browse/JDK-8022395
http://cr.openjdk.java.net/~twisti/8022395/webrev.00

8022395: java.util.zip.ZipException: Not in GZIP format in JT_JDK/test/java/util/zip/GZIP tests
Reviewed-by:

C1's instrinsic for java.util.zip.CRC32.update(int b) on x86 destroys the input value b but the register is not marked to be destroyed.  This can lead to a wrong value if CRC32.update is inlined.

The fix is to mark the LIRItem to be destroyed.  This will make C1 to insert a spill move.

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