> Hi, > > Flat accesses prevent scalar replacement because they are mismatched > accesses. It is also generally not possible to look through them, because the > payload may contain an oop in the form of raw bits. As a result, this PR adds > `LoadFlatNode` and `StoreFlatNode`, which act as high-level abstractions for > atomic accesses on flat fields. When it is determined that there is no racing > access on the flat field (e.g. because the holder object does not escape), > these flat access nodes can be expanded into multiple accesses to each > flattened fields, otherwise, they will be expanded into a sequence of > inferring a payload and accessing memory with that payload. > > I also fix an issue with deoptimization reallocation where we miss assigning > the null marker of elements in a nullable flat array. > > Please take a look and leave your reviews, thanks a lot.
Quan Anh Mai has updated the pull request incrementally with one additional commit since the last revision: Remove flat accesses from sfn_worklist ------------- Changes: - all: https://git.openjdk.org/valhalla/pull/1518/files - new: https://git.openjdk.org/valhalla/pull/1518/files/7c51d242..81654d3b Webrevs: - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1518&range=05 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1518&range=04-05 Stats: 4 lines in 2 files changed: 1 ins; 0 del; 3 mod Patch: https://git.openjdk.org/valhalla/pull/1518.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1518/head:pull/1518 PR: https://git.openjdk.org/valhalla/pull/1518
