hg: jdk/sandbox: 8248870: AARCH64: I2L/L2I conversions can be skipped for masked positive values

[chris.hegarty at oracle.com]

Changeset: d0f55423e913
Author:    bulasevich
Date:      2020-07-24 08:21 -0400
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/d0f55423e913

8248870: AARCH64: I2L/L2I conversions can be skipped for masked positive values
Reviewed-by: aph

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/aarch64/aarch64_ad.m4
! test/micro/org/openjdk/bench/vm/compiler/SkipIntToLongCast.java