[lworld] RFR: 8378167: [lworld] C2: "unused buffer allocation" in do_late_inline_helper [v2]

[Tobias Hartmann]

> When handling a scalarized return from an inlined method handle call in C2, we assert that we always make use of the buffer that we pre-allocated before the call. The assert is too strong because we could stop parsing in the callee due to an uncommon trap. I added a corresponding test that triggers this because we trap in the callee due to always throwing an exception.
> 
> Thanks,
> Tobias

Tobias Hartmann has updated the pull request incrementally with one additional commit since the last revision:

  V2

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/2177/files
  - new: https://git.openjdk.org/valhalla/pull/2177/files/98e48a79..c6edd01b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2177&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2177&range=00-01

  Stats: 51 lines in 3 files changed: 29 ins; 22 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/2177.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2177/head:pull/2177

PR: https://git.openjdk.org/valhalla/pull/2177