7d3ecd2bbc
Make the Dart register allocator spill what is needed instead of spilling all volatile registers. TEST=tsan Bug: https://github.com/dart-lang/sdk/issues/61352 Change-Id: Ic50937e305698565a14469181b1e5f408104c656 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/445964 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>