tree bea2e956a601f53a388d1263c1938a95532d928a
parent 02cf91129de9237ec0dd58430b3fb6c2b971b5b0
author James Price <jrprice@google.com> 1716997099 +0000
committer James Price <jrprice@google.com> 1716997099 +0000

[spirv] Do not add exit phi for loop initializer

When a loop with an empty initializer block has results, we were
treating the initializer as an implicit exit block and adding OpPhi
operands for it. The only implicit exit blocks we have are on `if`
instructions, so restrict the implicit exit block logic to those.

Change-Id: If0beaba4816f683fd58ec82d832a12c59f07e347
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/190462
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>