Also replace any null flag entries left in the parameter names array to
zero Smi values, so that after truncation, no null checks are needed for
retrieved flag entries.
Now that all appropriate places truncate the parameter names array after
setting any required bits, dynamic closure call dispatchers can simply
check for any post-name flag entries to detect missing required named
parameters if no named arguments were passed.
Without the added truncate calls, then
vm/dart/minimal_kernel_bytecode_test fails when dynamic closure call
dispatchers use that shortcut as seen on patchset 1 of CL 160725.
Bug: https://github.com/dart-lang/sdk/issues/40813
Change-Id: I25abd23ad3ce42b03ec5ca29b4e067c162826066
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/160860
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Tess Strickland
6349882b7a