tree 09070f271d637dbfad547cece0129493aebb28fc
parent a7207e9dcc0b3573dced10a463d8585289273c8d
author James Price <jrprice@google.com> 1685124105 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1685124105 +0000

[ir][spirv-writer] Implement loop instructions

We have to invent a header block and use that as the target for the
back-edge, and also make sure we always emit the continuing block with
a back-edge even when it is unreachable.

Bug: tint:1906
Change-Id: I1e66f5e7a54a01fbd7ac74865fa25d179a7ef5f5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/134561
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>