tree e8e11e7fcbbd66e045a21bbc4794488f299adfce
parent 71c9a7ab29dac9defe1a7a9ed52cb86d7b34152f
author James Price <jrprice@google.com> 1715267273 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1715267273 +0000

[ir] Add ReferencedModuleVars helper

This is a stateful helper that returns (and caches) the module-scope
variables that are transitively referenced by a function. Some work is
done on creation to determine which variables are directly referenced
by which blocks. The remaining work is done when the references for a
function are actually requested.

Update the ZeroInitializeWorkgroupMemory transform to use this helper.

Change-Id: I522d6521a61a94bf255ca9d9ff3d7d5998a2b69e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/169222
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>