tree 49e279dde6076c9785f82fe57e1181d2c2a74cca
parent e3edfd36b2aa7ff4e98fe541ef5666ef2e70d17e
author Alexander Markov <alexmarkov@google.com> 1558542876 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1558542876 +0000

[vm/compiler] Merge cid ranges when generating receiver check

This change adds merging of cid ranges into Cids::Create if there are
gaps with the same target function. Previously, this optimization was
performed only when calculating targets via CallTargets::CreateAndExpand.
However, Cids::Create is widely used to check receiver type if there is
only one targets (e.g. in CallSpecializer::AddReceiverCheck /
CallSpecializer::AddChecksForArgNr).

This optimization is needed to shrink huge code for CheckClass instructions
in Flutter RenderObject.layout() method in JIT mode.

Issue: https://github.com/dart-lang/sdk/issues/36428
Change-Id: I97051b4213066b252ac3238df55ab4ed5c98f412
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103402
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>