RFR: 8230486: G1BarrierSetAssembler::g1_write_barrier_post unnecessarily pushes/pops new_val in x86 code

Mon May 17 13:32:01 UTC 2021

Removes the unnecessary push/pop instruction.

Test: hotspot_gc

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Commit messages:
 - push

Changes: https://git.openjdk.java.net/jdk/pull/4063/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4063&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8230486
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4063.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4063/head:pull/4063

PR: https://git.openjdk.java.net/jdk/pull/4063