tree a3b0a8d9ddcd9775224c2e403ecc1f7d0f906270
parent ad2f7ccc553fc01b95006c8bf0828cb0bc04b206
author David Neto <dneto@google.com> 1592269419 +0000
committer dan sinclair <dsinclair@google.com> 1592269419 +0000

[spirv-reader] Support ifbreak with other forward edge

Add a guard variable for flow control within that if-selection.

Also, the premerge blocks are always surrounded by an if-selection,
to ensure we cause reconvergence at the end of the original if-selection
construct, just like in the original SPIR-V.

Bug: tint:3
Change-Id: I614c6840e539bf9a338058beb5b6f70484e3320a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/23182
Reviewed-by: dan sinclair <dsinclair@google.com>