[jdk16] RFR: 8258989: JVM is failed to inline in jdk.internal.vm.vector.VectorSupport::convert

[Wang Huang]

$java --add-modules=jdk.incubator.vector -Xcomp -XX:CompileCommand=compileonly,TestCast16BTo2D::* -XX:+UnlockDiagnosticVMOptions -XX:+PrintIntrinsics TestCast16BTo2D
before fixing:
  ** not supported: arity=1 op=cast/5 vlen2=2 etype1=byte ismask=0
                                    @ 3 jdk.internal.util.Preconditions::checkIndex (18 bytes) (intrinsic)
                                      @ 101 java.lang.Object::getClass (0 bytes) (intrinsic)
                                      @ 109 java.lang.Object::getClass (0 bytes) (intrinsic)
                                    @ 3 jdk.internal.util.Preconditions::checkIndex (18 bytes) (intrinsic)
                                    @ 31 jdk.internal.vm.vector.VectorSupport::load (38 bytes) (intrinsic)
                                      @ 128 jdk.internal.vm.vector.VectorSupport::convert (39 bytes) failed to inline (intrinsic)
                                @ 42 jdk.internal.vm.vector.VectorSupport::store (38 bytes) (intrinsic)
Expect:
                                    @ 3 jdk.internal.util.Preconditions::checkIndex (18 bytes) (intrinsic)
                                      @ 101 java.lang.Object::getClass (0 bytes) (intrinsic)
                                      @ 109 java.lang.Object::getClass (0 bytes) (intrinsic)
                                    @ 3 jdk.internal.util.Preconditions::checkIndex (18 bytes) (intrinsic)
                                    @ 31 jdk.internal.vm.vector.VectorSupport::load (38 bytes) (intrinsic)
                                      @ 128 jdk.internal.vm.vector.VectorSupport::convert (39 bytes) (intrinsic)
                                @ 42 jdk.internal.vm.vector.VectorSupport::store (38 bytes) (intrinsic)

-------------

Commit messages:
 - 8258989: JVM is failed to inline in jdk.internal.vm.vector.VectorSupport::convert

Changes: https://git.openjdk.java.net/jdk16/pull/74/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16&pr=74&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258989
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk16/pull/74.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16 pull/74/head:pull/74

PR: https://git.openjdk.java.net/jdk16/pull/74