hg: jdk/sandbox: 8231720: Some perf regressions after 8225653

[chris.hegarty at oracle.com]

Changeset: 1b76d17440a0
Author:    chagedorn
Date:      2019-10-10 10:27 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/1b76d17440a0

8231720: Some perf regressions after 8225653
Summary: Fixed emitting of unused assembly code in 8225653? which had a negative impact on performance in tight loops.
Reviewed-by: kvn, thartmann

! src/hotspot/cpu/x86/macroAssembler_x86.cpp