tree 1e23110646b185ef8a69bdf96a057c9d70cf165b
parent e272eaf30f35389e626d91f64a832d1195c379b9
author dan sinclair <dsinclair@chromium.org> 1669764587 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1669764587 +0000

[ir] Convert instruction to a pointer

This CL updates the instruction class to be a `Castable` and allocated
from an Arena. Uses are updated to store the const pointer.

Bug: tint:1718
Change-Id: Ie0b8353cb0c6fe6e2ba6e01bcd45871891aef903
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/112045
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>