Use r18 as allocatable register on Linux only. A bootstrap works now (it has been crashing before due to r18 being allocated): $ ./windows-aarch64-server-fastdebug/bin/java.exe -XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler -XX:+BootstrapJVMCI -version Bootstrapping JVMCI................................. in 17990 ms (compiled 3330 methods) openjdk version "16-internal" 2021-03-16 OpenJDK Runtime Environment (fastdebug build 16-internal+0-adhoc.NORTHAMERICAbeurba.openjdk-jdk) OpenJDK 64-Bit Server VM (fastdebug build 16-internal+0-adhoc.NORTHAMERICAbeurba.openjdk-jdk, mixed mode)
Jtreg tests `test/hotspot/jtreg/compiler/jvmci` are passing as well. ------------- Commit messages: - 8254827: JVMCI: Enable it for Windows+AArch64 Changes: https://git.openjdk.java.net/jdk/pull/685/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=685&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8254827 Stats: 15 lines in 3 files changed: 8 ins; 0 del; 7 mod Patch: https://git.openjdk.java.net/jdk/pull/685.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/685/head:pull/685 PR: https://git.openjdk.java.net/jdk/pull/685
