> C2 will now remove the slow call to > `ValueObjectMethods::isSubstitutable(Alt)` whenever it's able to determine > the layout of one of the operands. It will then emit code to directly compare > the fields. > > This patch also contains an intrinsic for `_getFieldMap` that will be used by > the new core-libs implementation of the substitutability check > ([JDK-8370450](https://bugs.openjdk.org/browse/JDK-8370450)) that's used by > the interpreter / C1 and as a slow path in C2. > > When browsing code, I marked a few rough edges in unrelated code for > follow-up cleanups with the corresponding bug numbers. > > Testing: tier1-tier6 + valhalla-comp-stress > > Thanks, > Tobias
Tobias Hartmann has updated the pull request incrementally with one additional commit since the last revision: Adjustments according to review comments ------------- Changes: - all: https://git.openjdk.org/valhalla/pull/1823/files - new: https://git.openjdk.org/valhalla/pull/1823/files/4f8556c7..35757d7f Webrevs: - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1823&range=02 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1823&range=01-02 Stats: 37 lines in 3 files changed: 3 ins; 0 del; 34 mod Patch: https://git.openjdk.org/valhalla/pull/1823.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1823/head:pull/1823 PR: https://git.openjdk.org/valhalla/pull/1823
