tree c04b124ceadb726a45a2651e73f87f6118a6a085
parent 47ff6be30cde208e723b1def242b16ef6e7d0a56
author dan sinclair <dsinclair@chromium.org> 1749526507 -0700
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1749526507 -0700

[ir] When raising to a program handle unreachable as function terminator.

If an unreachable is the terminator of a function, and the function is
non-void, we swap the terminator out for a `return` of the function
return types zero value. This works around an issue where WGSL requires
a terminator, but does not have the behaviour analysis to determine if
the end of function is actually reachable or not.

Bug: 42250952
Change-Id: I5ef07147632d3ac54fdcc911cc844b959861626b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/246075
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: James Price <jrprice@google.com>