git: openjdk/jdk: 8300247: Harden C1 xchg on AArch64 and PPC

[Erik Österlund]

Changeset: 28545dcf
Author:    Erik Österlund <eosterlund at openjdk.org>
Date:      2023-01-26 14:35:25 +0000
URL:       https://git.openjdk.org/jdk/commit/28545dcf2b542efe3021a567a198b0794ecf7011

8300247: Harden C1 xchg on AArch64 and PPC

Co-authored-by: Martin Doerr <mdoerr at openjdk.org>
Reviewed-by: aph, rcastanedalo

! src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
! src/hotspot/cpu/ppc/c1_LIRAssembler_ppc.cpp
! src/hotspot/cpu/riscv/c1_LIRAssembler_riscv.cpp