tree ac42f24868d37b686cde1c0eb2beba58c62c3fae
parent 3a9e206d78c0282b86a0b5459eee6ca24afe6151
author dan sinclair <dsinclair@chromium.org> 1749158403 -0700
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1749158403 -0700

[ir_to_program] Cleanup IRToProgram.

This Cl simplifies the binding tracking to just store the `ir_expr`,
`ast_expr` or `name` we care about and drops the use of the `variant`
and visitor code. The `SCOPED_NESTING` is removed in favour of the more
commonly used `TINT_SCOPED_ASSIGNMENT`.

Bug: 422532802
Change-Id: I6b3aa199276c26069f229b4fa6f17352859ec280
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/245614
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: James Price <jrprice@google.com>