If the array size is greater than a threshold.
This is a work around for FXC stalling when initializing large arrays
with a single zero-init assignment.
Bug: tint:936
Fixed: tint:943
Fixed: tint:942
Change-Id: Ie93c8f373874b8d6d020d041fa48b38fb1352f71
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/56775
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Ben Clayton